2011 Wind Technologies Market Report

2011 WIND

TECHNOLOGIES

MARKET REPORT

AUGUST 2012

NOTICE

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2011 Wind Technologies Market Report

Primary authors

Ryan Wiser, Lawrence Berkeley National Laboratory

Mark Bolinger, Lawrence Berkeley National Laboratory

With contributions from

Galen Barbose, Naïm Darghouth, Ben Hoen, Andrew Mills (Berkeley Lab)

Kevin Porter, Michael Buckley, Sari Fink (Exeter Associates)

Frank Oteri, Suzanne Tegen (National Renewable Energy Laboratory)

Table of Contents

Acknowledgments ......................................................................................................................... i

List of Acronyms ........................................................................................................................... ii

Executive Summary .................................................................................................................... iii

1. Introduction ............................................................................................................................... 1

2. Installation Trends ................................................................................................................... 3

3. Industry Trends ...................................................................................................................... 14

4. Cost Trends ............................................................................................................................ 32

5. Performance Trends .............................................................................................................. 41

6. Wind Power Price Trends ..................................................................................................... 48

7. Policy and Market Drivers .................................................................................................... 57

8. Future Outlook ........................................................................................................................ 69

Appendix: Sources of Data Presented in this Report .......................................................... 72

References .................................................................................................................................. 76

Acknowledgments

For their support of this ongoing report series, the authors thank the entire U.S. Department of Energy (DOE) Wind

& Water Power Program team, and in particular Patrick Gilman and Mark Higgins. For reviewing elements of this

report or providing key input, we also acknowledge: J. Charles Smith (Utility Variable-Generation Integration

Group); Erik Ela, Eric Lantz, and KC Hallett (National Renewable Energy Laboratory, NREL); Michael Goggin,

Liz Salerno, and Emily Williams (American Wind Energy Association); Thomas Carr (Western Governors’

Association); Ed DeMeo (Renewable Energy Consulting Services, Inc.); Patrick Gilman, Cash Fitzpatrick, and Liz

Hartman (DOE); Alice Orrell (Pacific Northwest National Laboratory, PNNL); Jim Walker (enXco); Matt McCabe

(Clear Wind); Andrew David (US International Trade Commission); Charlie Bloch and Bruce Hamilton (Navigant

Consulting); Steve Clemmer (Union of Concerned Scientists); Chris Namovicz (Energy Information

Administration); and David Drescher (Exelon Generation). Thanks to the American Wind Energy Association for

the use of their database of wind power projects. We also thank Amy Grace (Bloomberg New Energy Finance) for

the use of Bloomberg NEF’s graphic on domestic wind turbine nacelle assembly capacity; Charlie Bloch and Bruce

Hamilton (Navigant Consulting) for assistance with the section on offshore wind; Donna Heimiller and Billy

Roberts (NREL) for assistance with the wind project and wind manufacturing maps; and Kathleen O’Dell (NREL)

for assistance with layout, formatting, and production. Berkeley Lab’s contributions to this report were funded by

the Wind & Water Power Program, Office of Energy Efficiency and Renewable Energy of the U.S. Department of

Energy under Contract No. DE-AC02-05CH11231. The authors are solely responsible for any omissions or errors

contained herein.

2011 Wind Technologies Market Report

List of Acronyms

AWEA American Wind Energy Association

BPA Bonneville Power Administration

CAISO California Independent System Operator

CCGT combined cycle gas turbine

COD commercial operation date

CREZ competitive renewable energy zone

DOE U.S. Department of Energy

EIA Energy Information Administration

ERCOT Electric Reliability Council of Texas

FERC Federal Energy Regulatory Commission

GE General Electric Corporation

GW gigawatt

IOU investor-owned utility

IPP independent power producer

ISO independent system operator

ISO-NE New England Independent System Operator

ITC investment tax credit

kW kilowatt

kWh kilowatt-hour

MISO Midwest Independent System Operator

MW megawatt

MWh megawatt-hour

NERC North American Electric Reliability Corporation

NREL National Renewable Energy Laboratory

NYISO New York Independent System Operator

OEM original equipment manufacturer

O&M operations and maintenance

PJM PJM Interconnection

POU publicly owned utility

PPA power purchase agreement

PTC Production Tax Credit

PUC public utility commission

REC renewable energy certificate

RFI request for information

RPS renewables portfolio standard

RTO regional transmission organization

SPP Southwest Power Pool

WAPA Western Area Power Administration

2011 Wind Technologies Market Report

iii

Executive Summary

The U.S. wind power industry is facing uncertain times. With 2011 capacity additions having

risen from 2010 levels and with a further sizable increase expected in 2012, there are – on the

surface – grounds for optimism. Key factors driving growth in 2011 included continued state

and federal incentives for wind energy, recent improvements in the cost and performance of

wind power technology, and the need to meet an end-of-year construction start deadline in order

to qualify for the Section 1603 Treasury grant program. At the same time, the currently-slated

expiration of key federal tax incentives for wind energy at the end of 2012 – in concert with

continued low natural gas prices and modest electricity demand growth – threatens to

dramatically slow new builds in 2013.

Key findings from this year’s “Wind Technologies Market Report” include:

• Wind Power Additions Increased in 2011, with Roughly 6.8 GW of New Capacity

Added in the United States and $14 Billion Invested. Wind power installations in 2011

were 31% higher than in 2010, but still well below the levels seen in 2008 and 2009.

Cumulative wind power capacity grew by 16% in 2011, bringing the total to nearly 47 GW.

• Wind Power Comprised 32% of U.S. Electric Generating Capacity Additions in 2011.

This is up from 25% in 2010, but below its historic peak of 42-43% in 2008 and 2009. In

2011, for the sixth time in the past seven years, wind power was the second-largest new

resource (behind natural gas) added to the U.S. electrical grid in terms of gross capacity.

• The United States Remained the Second Largest Market in Annual and Cumulative

Wind Power Capacity Additions, but Was Well Behind the Market Leaders in Wind

Energy Penetration. After leading the world in annual wind power capacity additions from

2005 through 2008, the U.S. has now – for three years – been second to China, comprising

roughly 16% of global installed capacity in 2011, up slightly from 13% in 2010, but down

substantially from 26-30% from 2007 through 2009. In terms of cumulative capacity, the

U.S. also remained the second leading market, with nearly 20% of total global wind power

capacity. A number of countries are beginning to achieve relatively high levels of wind

energy penetration in their electricity grids: end-of-2011 wind power capacity is estimated to

supply the equivalent of roughly 29% of Denmark’s electricity demand, 19% of Portugal’s,

19% of Spain’s, 18% of Ireland’s, and 11% of Germany’s. In the United States, the

cumulative wind power capacity installed at the end of 2011 is estimated, in an average year,

to equate to roughly 3.3% of the nation’s electricity demand.

• California Added More New Wind Power Capacity than Any Other State, While Six

States Are Estimated to Exceed 10% Wind Energy Penetration. With 921 MW added,

California led the 29 other states in which new large-scale wind turbines were installed in

2011, ending Texas’ six-year reign (Texas fell to ninth place in 2011). Other states with

more than 500 MW added in 2011 included Illinois, Iowa, Minnesota, Oklahoma, and

Colorado. On a cumulative basis, Texas remained the clear leader. Notably, the wind power

capacity installed in South Dakota and Iowa as of the end of 2011 is estimated, in an average

year, to supply approximately 22% and 20%, respectively, of all in-state electricity

generation. Four other states are also estimated to exceed 10% penetration by this metric:

Minnesota, North Dakota, Colorado, and Oregon.

2011 Wind Technologies Market Report

• No Offshore Turbines Have Been Commissioned in the United States, but Offshore

Project and Policy Developments Continued in 2011. At the end of 2011, global offshore

wind power capacity stood at roughly 4,000 MW, with the vast majority located in Europe.

To date, no offshore projects have been installed in the United States. Nonetheless,

significant strides have been made recently in the federal arena, through both the Department

of the Interior's responsibilities with regard to regulatory approvals and the Department of

Energy's investments in offshore wind R&D. Interest exists in developing offshore wind

energy in several parts of the country – e.g., Navigant finds that ten projects totaling 3,800

MW are somewhat more advanced in the development process. Of these, two have signed

power purchase agreements (a third offshore wind PPA was recently canceled).

• Data from Interconnection Queues Demonstrate that an Enormous Amount of Wind

Power Capacity Is Under Consideration. At the end of 2011, there were 219 GW of wind

power capacity within the transmission interconnection queues administered by independent

system operators, regional transmission organizations, and utilities reviewed for this report.

This wind power capacity represented 45% of all generating capacity within these queues at

that time, and was 1.5 times as much capacity as the next-largest resource (natural gas). Of

note, however, is that the absolute amount of wind and coal power capacity in the sampled

interconnection queues has declined in recent years, whereas natural gas and solar capacity

has increased. Most (96%) of the wind power capacity is planned for the Midwest, PJM

Interconnection, Texas, Mountain, Northwest, Southwest Power Pool, and California regions.

Projects currently in interconnection queues are often very early in the development process,

so much of this capacity is unlikely to be built as planned; nonetheless, these data

demonstrate the continued high level of developer interest in wind power.

• Despite the Ongoing Proliferation of New Entrants, the “Big Three” Turbine Suppliers

Have Gained U.S. Market Share Since 2009. GE and Vestas both secured roughly 29% of

U.S. market share (by capacity installed) in 2011, followed by Siemens (18%), Suzlon and

Mitsubishi (both at 5%), Nordex and Clipper (both at 4%), REpower (3%), and Gamesa

(2%). There has been a notable increase in the number of wind turbine manufacturers serving

the U.S. market – those installing more than 1 MW has increased from just 5 in 2005 to 20

manufacturers in 2011. Recently, however, there is evidence of gains in the aggregate

market share of the three leading manufacturers: GE, Vestas, and Siemens. On a worldwide

basis, Chinese turbine manufacturers continue to occupy positions of prominence: four of

the top ten, and seven of the top 15, leading global suppliers of wind turbines in 2011 hail

from China. To date, that growth has been based almost entirely on sales to the Chinese

market. However, 2011 installations by Chinese and South Korean manufacturers in the U.S.

include those from Sany Electric (10 MW), Samsung (5 MW), Goldwind (4.5 MW), Hyundai

(3.3 MW), Sinovel (1.5 MW), and Unison (1.5 MW).

• Domestic Wind Turbine and Component Manufacturing Capacity Has Increased, but

Uncertainty in Future Demand Has Put the Wind Turbine Supply Chain Under Severe

Pressure. Eight of the ten wind turbine manufacturers with the largest share of the U.S.

market in 2011 had one or more manufacturing facilities in the United States at the end of

2011. In contrast, in 2004 there was only one active utility-scale wind turbine manufacturer

assembling nacelles in the United States (GE). In addition, a number of new wind turbine

and component manufacturing facilities were either announced or opened in 2011, by both

foreign and domestic firms. The American Wind Energy Association (AWEA) estimates

that the entire wind energy sector directly and indirectly employed 75,000 full-time workers

2011 Wind Technologies Market Report

in the United States at the end of 2011 – equal to the jobs reported in 2010 but fewer than in

2008 and 2009. Though domestic manufacturing capabilities have grown, uncertain

prospects after 2012 – due primarily to the scheduled expiration of federal incentives – are

pressuring the wind industry’s domestic supply chain as margins drop and concerns about

manufacturing overcapacity deepen, potentially setting the stage for significant layoffs. The

growth in U.S. wind turbine manufacturing capability and the drop in wind power plant

installations since 2009 led to an estimated over-capacity of U.S. turbine nacelle assembly

capability of more than 5 GW in 2011, in comparison to 4 GW of under-capacity in 2009.

Over-capacity relative to U.S. turbine demand is anticipated to be even more severe in 2013

and 2014. As a result of this over-supply, coupled with increasing competition, including

from new entrants from China and Korea, a wide range of turbine manufacturers have

reported weakened financial results, with companies throughout the U.S. wind industry’s

supply chain announcing cuts to their U.S. workforce.

• A Growing Percentage of the Equipment Used in U.S. Wind Power Projects Has Been

Sourced Domestically in Recent Years. U.S. trade data show that the United States

remained a large importer of wind power equipment in 2011, but that growth in installed

wind power capacity has outpaced the growth in imports in recent years. As a result, a

growing percentage of the equipment used in wind power projects is being sourced

domestically. When presented as a fraction of total equipment-related wind turbine costs,

domestic content is estimated to have increased significantly from 35% in 2005-2006 to 67%

in 2011. Exports of wind-powered generating sets from the United States have also

increased, rising from $15 million in 2007 to $149 million in 2011.

• The Average Nameplate Capacity, Hub Height, and Rotor Diameter of Installed Wind

Turbines Increased. The average nameplate capacity of wind turbines installed in the

United States in 2011 increased to 1.97 MW, up from 1.80 MW in 2010 and the largest

single-year increase in more than six years. Since 1998-99, average turbine nameplate

capacity has increased by 174%. Average hub heights and rotor diameters have also scaled

with time, to 81 and 89 meters, respectively, in 2011. Since 1998-99, the average turbine

hub height has increased by 45%, while the average rotor diameter has increased by 86%. In

large part, these increases have been driven by new turbines designed to serve lower-wind-

speed sites. Industry expectations as well as new turbine announcements (mostly

surrounding additional low-wind-speed turbines) suggest that significant further scaling,

especially in average rotor diameter, is anticipated in the near term.

• Project Finance Was a Mixed Bag in 2011, as Debt Terms Deteriorated While Tax

Equity Held Steady. After steady improvement in both the debt and tax equity markets

throughout 2010, progress faltered somewhat in 2011 on the debt side as the latest

Greek/European debt crisis drove a new round of retrenchment. At the same time, new

banking regulations took hold, driving considerably shorter bank loan tenors (institutional

lenders, meanwhile, continued to offer significantly longer products). In contrast to the

weakened debt market, the market for tax equity improved somewhat in 2011, with pricing

remaining fairly stable and a handful of new or returning investors entering the market. As

the number of grandfathered Section 1603 grant deals begins to taper off in 2012, however,

attrition in tax equity investors is possible, as some have indicated no interest in PTC deals.

• IPPs Remain the Dominant Owners of Wind Projects, But Utility Ownership Increased

Significantly in 2011, Largely On the Back of One Utility. Independent power producers

(IPPs) own 73% of all new wind power capacity installed in the United States in 2011, and

2011 Wind Technologies Market Report

82% of the cumulative installed capacity. Utility ownership jumped to nearly 25% in 2011

(as MidAmerican Energy alone added nearly 600 MW in Iowa), up from 15% in the two

previous years, and reached 17% on a cumulative basis.

• Long-Term Contracted Sales to Utilities Remained the Most Common Off-Take

Arrangement, but Scarcity of Power Purchase Agreements and Looming PTC

Expiration Drove Continued Merchant Development. Electric utilities continued to be

the dominant purchasers (i.e., off-takers) of wind power in 2011, either owning (25%) or

buying (51%) power from 76% of the new capacity installed last year. Merchant/quasi-

merchant projects were less prevalent in 2011 than they have been in recent years,

accounting for 21% of all new capacity. With power purchase agreements (PPAs) in

relatively short supply in comparison to wind developer interest, wholesale power prices at

low levels, and a scheduled PTC expiration looming, it is likely that many of the

merchant/quasi-merchant projects built in 2011 are merchant by necessity rather than by

choice – i.e., building projects on a merchant basis may, in some cases, simply have been the

most expedient way to ensure the deployment of committed turbines in advance of the

scheduled expiration of important federal incentives. Some of these projects are, therefore,

likely still seeking long-term PPAs. On a cumulative basis, utilities own (17%) or buy (50%)

power from 66% of all wind power capacity in the United States, with merchant/quasi-

merchant projects accounting for 24% and power marketers 10%.

• With Increased Competition among Manufacturers, Wind Turbine Prices Continued to

Decline in 2011. After hitting a low of roughly $700/kW from 2000 to 2002, average wind

turbine prices increased by approximately $800/kW (>100%) through 2008, rising to an

average of more than $1,500/kW. Wind turbine prices have since dropped substantially,

despite continued technological advancements that have yielded increases in hub heights and

especially rotor diameters. A number of turbine transactions announced in 2011 had pricing

in the $1,150-$1,350/kW range and price quotes for recent transactions are reportedly in the

range of $900-$1,270/kW, depending on the technology. These price reductions, coupled

with improved turbine technology and more-favorable terms for turbine purchasers, should,

over time, exert downward pressure on total project costs and wind power prices.

• Though Slow to Reflect Declining Wind Turbine Prices, Reported Installed Project

Costs Finally Turned the Corner in 2011. Among a large sample of wind power projects

installed in 2011, the capacity-weighted average installed project cost stood at nearly

$2,100/kW, down almost $100/kW from the reported average cost in both 2009 and 2010.

Moreover, a preliminary estimate of the average installed cost among a relatively small

sample of projects that either have been or will be built in 2012 suggests that average

installed costs may decline further in 2012, continuing to follow lower turbine prices.

• Installed Costs Differ By Project Size, Turbine Size, and Region. Installed project costs

are found to exhibit some weak economies of scale, at least at the lower end of the project

and turbine size range. Texas is found to be the lowest-cost region, while California and

New England were the highest-cost regions.

• Newer Projects Appear to Show Improvements in Operations and Maintenance Costs.

Despite limited data availability, it appears that projects installed more recently have, on

average, incurred lower O&M costs than older projects in their first several years of

operation, and that O&M costs increase as projects age.

• Sample-Wide Wind Project Capacity Factors Have Generally Improved Over Time.

Boosted primarily by taller towers and larger rotor diameters (relative to nameplate capacity),

2011 Wind Technologies Market Report

vii

average sample-wide wind power project capacity factors have, in general, gradually

increased over time, from 25% in 1999 (for projects installed through 1998) to a high of

nearly 34% in 2008 (for projects installed through 2007). In 2009 and 2010, however,

sample-wide capacity factors dropped to around 30%, before 2011 brought a resurgence back

to 33% (for projects installed through 2010). The drop in 2009 and 2010 was likely due to a

combination of lackluster wind speeds throughout much of the U.S. in both 2009 and 2010 as

well as wind power curtailment (particularly severe in 2009).

• Some Stagnation in Wind Project Capacity Factor Improvement Is Evident Among

Projects Built from 2006 through 2010, Due in Part to a Build Out of Projects in

Progressively Weaker Wind Resource Areas. Focusing only on capacity factors in 2011

parsed by project vintage reveals that average capacity factors have been largely stagnant

among projects built from 2006 through 2010 (though the maximum capacity factor attained

by any individual project in 2011 increased noticeably among projects built in 2009 and

2010, and the fact that rotor scaling continued for projects built in 2011 suggests that further

increases in capacity factors are likely in 2012, all else equal). Three main drivers appear to

be behind this stagnation: the average hub height of wind power projects has only increased

by a few meters since 2006 (after growing rapidly in earlier years), the average rotor swept

area relative to turbine nameplate capacity (i.e., the inverse of “specific power”) also held

steady during much of this period (though increased considerably in both 2010 and 2011),

while the average quality of the wind resource among those projects built in each year has

deteriorated significantly since 2008. This final trend of building projects in progressively

less-energetic wind resource sites may be driven by the proliferation of low wind speed

turbine designs (see above), siting challenges (including transmission constraints), and even

policy design (the value of the Section 1603 cash grant does not depend on how energetic a

given site is).

• Regional Variations in Capacity Factor Reflect the Strength of the Wind Resource.

Based on a sub-sample of wind power projects built from 2004 through 2010, capacity-

weighted average capacity factors were the highest in the Heartland (37%) and Mountain

(36%) regions in 2011, and lowest in the East (25%) and in New England (28%). Not

surprisingly, these regional rankings are roughly consistent with the relative quality of the

wind resource in each region.

• Unlike Turbine Prices and Installed Project Costs, Cumulative, Sample-Wide Wind

Power Prices Continued to Move Higher in 2011. After having declined through 2005,

sample-wide average wind power prices have risen steadily, such that in 2011, the

cumulative sample of 271 projects totaling 20,189 MW built from 1998 through 2011 had an

average power sales price of $54/MWh. This general temporal trend of falling and then

rising prices is consistent with – but lags, due to the cumulative nature of the sample – the

turbine price and installed project cost trends (at least through 2008 and 2010, respectively)

described earlier.

• Binning Wind Power Sales Prices by Project Vintage Also Fails to Show a Price

Reversal. The capacity-weighted average 2011 sales price, based on projects in the sample

built in 2011, was roughly $74/MWh – essentially unchanged from the average among

projects built in 2010 (the spread of individual project prices is also similar among projects

built in 2010 and 2011), and more than twice the average of $32/MWh among projects built

during the low point in 2002 and 2003. Although the similarity in pricing among 2010 and

2011 projects may actually portend a peak (with lower prices likely among 2012 projects),

2011 Wind Technologies Market Report

viii

the fact that neither calendar year prices (among a cumulative sample) nor 2011 prices

(binned by project vintage) show any sort of price reversal is nevertheless surprising,

particularly given the degree to which turbine prices have dropped since 2008, along with

growing evidence of aggressive pricing in wind PPAs.

• Binning Wind Power Sales Prices by PPA Execution Date Shows Steeply Falling Prices.

An abnormally long lag between when PPAs were signed and when projects were built

appears to be largely responsible for the stubborn lack of a price reversal in 2011 when

viewed by calendar year or project vintage. Only two projects within the sample that were

built in 2011 actually signed PPAs in 2011. All other 2011 projects in the sample signed

PPAs in 2010, 2009, or even back as far as 2008 – i.e., at the height of the market for

turbines – thereby locking in prices that ended up being above market in 2011. Binning by

PPA signing date reveals that the average price peaked in 2009 and then progressively fell in

both 2010 and 2011. Among a sample of “full term” wind project PPAs signed in 2011, the

capacity-weighted average levelized PPA price is $35/MWh, down from $59/MWh for PPAs

signed in 2010 and $72/MWh for PPAs signed in 2009.

• Wind Power PPA Prices Vary Widely By Region. Texas, the Heartland, and the Mountain

regions appear to be among the lowest-price regions, on average, while California is, by far,

the highest price region. California also accounts for nearly one quarter of the 2011 project

sample, thereby disproportionately inflating the capacity-weighted average price in 2011 (as

it also did in 2010, when it made up almost 20% of the sample).

• Low Wholesale Electricity Prices Continued to Challenge the Relative Economics of

Wind Power. Average wind power prices compared favorably to wholesale electricity

prices from 2003 through 2008. Starting in 2009, however, increasing wind power prices,

combined with a sharp drop in wholesale electricity prices (driven by lower natural gas

prices), pushed wind energy to the top of (and in 2011 above) the wholesale power price

range. Although low wholesale electricity prices are, in part, attributable to the recession-

induced drop in energy demand, the ongoing development of significant shale gas deposits

has also resulted in reduced expectations for gas price increases going forward. While

comparing wind and wholesale electricity prices in this manner is not appropriate if one’s

goal is to fully account for the costs and benefits of wind energy relative to its competition,

these developments may nonetheless put the near-term comparative economic position of

wind energy at some risk absent further reductions in the price of wind power and absent

supportive policies for wind energy. That said, levelized PPA prices in the $30-$40/MWh

range (currently achievable, with the PTC, in many parts of the interior U.S.) are fully

competitive with the range of wholesale power prices seen in 2011.

• Uncertainty Reigns in Federal Incentives for Wind Energy Beyond 2012. The Recovery

Act enabled wind power projects placed in service prior to the end of 2012 to elect a 30%

investment tax credit (ITC) in lieu of the production tax credit (PTC). More importantly,

given the relative scarcity of tax equity in the immediate wake of the financial crisis, the

Recovery Act also enabled wind power projects to elect a 30% cash grant from the Treasury

in lieu of federal tax credits. More than 60% of the new wind capacity installed in 2011

elected the cash grant. However, in order to qualify for the grant, wind power projects must

have been under construction by the end of 2011, must apply for a grant by October 1, 2012,

and must be placed in service by the end of 2012. With the PTC, ITC, and bonus

depreciation all also currently scheduled to expire at the end of 2012, the wind energy sector

is currently facing serious federal policy uncertainty looking to 2013 and beyond.

2011 Wind Technologies Market Report

• State Policies Play a Role in Directing the Location and Amount of Wind Power

Development, but Current Policies Cannot Support Continued Growth at the Levels

Seen in the Recent Past. From 1999 through 2011, 65% of the wind power capacity built in

the United States was located in states with renewables portfolio standards (RPS); in 2011,

this proportion was 78%. As of July 2012, mandatory RPS programs existed in 29 states and

Washington D.C., and a number of states strengthened previously established programs in

2011. However, existing RPS programs are projected to drive average annual renewable

energy additions of roughly 4-5 GW/year (not all of which will be wind) between 2012 and

2020, which is less than the amount of wind capacity added in recent years and demonstrates

the limitations of relying exclusively on state RPS programs to drive future deployment.

• Despite Progress on Overcoming Transmission Barriers, Constraints Remain.

Transmission development has continued to gain traction during recent years, with about

2,300 circuit miles of new transmission additions under construction near the end of 2011,

and with an additional 17,800 circuit miles planned through 2015. The wind industry has

identified near-term transmission projects that – if all were completed – could carry almost

45 GW of wind power capacity. In July 2011, the Federal Energy Regulatory Commission

(FERC) issued an order that requires public utility transmission providers to improve

transmission planning processes and to determine a cost allocation methodology for new

transmission facilities. States, grid operators, utilities, regional organizations, and the

Department of Energy also continue to take proactive steps to encourage transmission

investment. Finally, construction and development progress was made in 2011 on a number

of transmission projects designed, in part, to support wind power. Nonetheless, siting,

planning, and cost allocation issues remain key barriers to transmission investment, and wind

curtailment continues to be a problem in some areas.

• Integrating Wind Energy into Power Systems Is Manageable, but Not Free of Costs,

and System Operators Are Implementing Methods to Accommodate Increased

Penetration. Recent studies show that wind energy integration costs are below $12/MWh –

and often below $5/MWh – for wind power capacity penetrations of up to or even exceeding

40% of the peak load of the system in which the wind power is delivered. The increase in

balancing reserves with increased wind power penetration is projected, in most cases, to be

below 15% of the nameplate capacity of wind power, and typically considerably less than

this figure, particularly in studies that use intra-hour scheduling. Moreover, a number of

strategies that can help to ease the integration of increasing amounts of wind energy –

including the use of larger balancing areas, the use of wind forecasts, and intra-hour

scheduling – are being implemented by grid operators across the United States.

With federal tax incentives for wind energy currently slated to expire at the end of 2012, new

capacity additions in 2012 are anticipated to exceed 2011 levels and perhaps even the highs in

2009 as developers rush to commission projects. At the same time, despite the improved cost,

performance, and price of wind energy, policy uncertainty – in concert with continued low

natural gas prices, modest electricity demand growth, and the aforementioned slack in existing

state policies – threatens to dramatically slow new builds in 2013 and beyond. Forecasts for

2013 and beyond therefore span a particularly wide range, depending in large measure on

assumptions about the possible extension of federal incentives.

2011 Wind Technologies Market Report

1. Introduction

The U.S. wind power industry is facing uncertain times. With 2011 capacity additions having

risen from 2010 levels and with a further sizable increase expected in 2012, there are – on the

surface – grounds for optimism. At the same time, the currently-slated expiration of key federal

tax incentives for wind energy at the end of 2012 – in concert with continued low natural gas

prices and modest electricity demand growth – threatens to dramatically slow new builds in

2013, despite recent improvements in the cost and performance of wind power technology. In

combination with growing global competition within the sector, these trends have already

negatively impacted the U.S. wind power industry’s supply chain.

The wind power sector is dynamic, making it difficult to keep up with evolving trends in the

marketplace. This annual report – now in its sixth year – meets the need for timely, objective

information on the industry and its progress by providing a detailed overview of developments

and trends in the United States wind power market, with a particular focus on 2011. As with

previous editions, this report begins with an overview of key installation-related trends: trends in

wind power capacity growth; how that growth compares to other countries and generation

sources; the amount and percentage of wind energy in individual states; the status of offshore

wind power development; and the quantity of proposed wind power capacity in various

interconnection queues in the United States. Next, the report covers an array of wind power

industry trends, including: developments in turbine manufacturer market share; manufacturing

and supply-chain investments; wind turbine and component imports into and exports from the

United States; wind turbine size, hub height, and rotor diameter; project financing developments;

and trends among wind power project owners and power purchasers. The report then turns to a

discussion of wind power cost, performance, and pricing trends. In so doing, it describes trends

in wind turbine transaction prices, installed project costs, operations and maintenance expenses,

and project performance. It also reviews the prices paid for wind power in the United States, and

how those prices compare to short-term wholesale electricity prices. Next, the report examines

policy and market factors impacting the domestic wind power market, including federal and state

policy drivers, transmission issues, and grid integration. Finally, the report concludes with a

preview of possible near-term market developments.

This sixth edition of the annual report updates data presented in previous editions, while

highlighting key trends and important new developments from 2011. New to this edition is a

summary of trends in the wind resource conditions in which wind power projects have been

sited, as well as differences in how wind power sales prices are reported – including new data on

full-term power purchase agreement (PPA) prices levelized over the full contract term. The

report concentrates on larger-scale wind turbines, defined here as individual turbines that exceed

100 kW in size.

The U.S. wind power sector is multifaceted, however, and also includes

smaller, customer-sited wind turbines used to power residences, farms, and businesses. Data on

these latter applications are not the focus of this report, though a brief discussion on Small Wind

This 100 kW threshold between ‘small’ and ‘large’ wind turbines is applied starting with 2011 projects (to better

match AWEA’s historical methodology), and is justified by the fact that the U.S. tax code makes a similar

distinction. In years prior to 2011, however, different cut-offs are used to (a) better match AWEA’s reported

capacity numbers and (b) to ensure that older utility-scale wind power projects in California are not excluded from

the sample.

2011 Wind Technologies Market Report

Turbines is provided on page 4. Because this report has an historical focus and all wind power

projects installed in the U.S. have been land-based, its treatment of trends in the offshore wind

power sector is limited to a brief summary of recent developments. A companion report funded

by the U.S. Department of Energy that focuses exclusively on offshore wind energy will be

published later this year.

Much of the data included in this report were compiled by Berkeley Lab, and come from a

variety of sources, including the American Wind Energy Association (AWEA), the Energy

Information Administration (EIA), and the Federal Energy Regulatory Commission (FERC).

The Appendix provides a summary of the many data sources used in the report, and a list of

specific references follows the Appendix. Data on wind power capacity additions in the United

States are based largely on information provided by AWEA, though minor methodological

differences may yield slightly different numbers from AWEA (2012a) in some cases. In other

cases, the data shown here represent only a sample of actual wind power projects installed in the

United States; furthermore, the data vary in quality. As such, emphasis should be placed on

overall trends, rather than on individual data points. Finally, each section of this document

primarily focuses on historical market information, with an emphasis on 2011; with some limited

exceptions (including the final section of the report), the report does not seek to forecast future

trends.

2011 Wind Technologies Market Report

2. Installation Trends

Wind Power Additions Increased in 2011, with Roughly 6.8 GW of New

Capacity Added in the United States and $14 Billion Invested

The U.S. wind power market grew more rapidly in 2011 than in 2010, with 6,816 MW of new

capacity added, bringing the cumulative total to nearly 47,000 MW (Figure 1).

This growth

translates into $14.3 billion (real 2011 dollars) invested in wind power project installation in

2011, for a cumulative investment total of $95 billion since the beginning of the 1980s.

Wind

power installations in 2011 were 31% higher than in 2010, but still well below the levels seen in

2008 and 2009. Cumulative wind power capacity grew by 16% in 2011.

Source: AWEA project database

Figure 1. Annual and Cumulative Growth in U.S. Wind Power Capacity

Key factors driving growth in 2011 included: continued state and federal incentives for wind

energy, recent improvements in the cost and performance of wind power technology, and the

need to meet an end-of-year construction start deadline in order to qualify for the Section 1603

Treasury grant program. With the Section 1603 grant and other federal tax incentives for wind

energy scheduled to expire at the end of 2012, new capacity additions in 2012 are anticipated to

substantially exceed 2011 levels as developers rush to commission projects. At the same time,

this scheduled expiration – in concert with continued low natural gas prices, modest electricity

demand growth, and existing state policies that are not sufficient to support continued capacity

additions at the levels witnessed in recent years – threatens to dramatically slow new builds in

2013 and beyond.

When reporting annual wind power capacity additions, this report focuses on gross capacity additions of large

wind turbines. The net increase in capacity each year can be somewhat lower, reflecting turbine decommissioning.

These investment figures are based on an extrapolation of the average project-level capital costs reported later in

this report, and do not include investments in manufacturing facilities, research & development expenditures, or

operations and maintenance (O&M) costs.

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

Annual US Capacity (left scale)

Cumulative US Capacity (right scale)

Cumulative Capacity (GW)

Annual Capacity (GW)

2011 Wind Technologies Market Report

Wind Power Comprised 32% of U.S. Electric Generating Capacity Additions

in 2011

Wind power has represented one of the largest new sources of electric capacity additions in the

United States in recent years. In 2011, wind power was again (for the sixth time in seven years)

the second-largest new resource added to the U.S. electrical grid in terms of gross capacity

additions, behind the 10,500 MW of new natural gas capacity.

New wind power projects

Data presented here are based on gross capacity additions, not considering retirements.

Small Wind Turbines

Small wind turbines can provide power directly to homes, farms, schools, businesses, and industrial facilities,

offsetting the need to purchase some portion of the host’s electricity from the grid; such wind turbines can also

provide power to off-grid sites. Wind turbines used in these applications are often much smaller – generally

ranging in size from a few hundred watts to 100 kW – than the larger-scale turbines that are the primary focus of

this report.

The table below summarizes sales of small wind turbines, 100 kW and less in size, into the U.S. market from

2005 through 2011. Roughly 19 MW of small wind turbines were sold in the U.S. in 2011, most of which came

from turbines manufactured by U.S. companies. These installation figures represent a 26% decline in annual

sales – in capacity terms – relative to 2010, yielding a cumulative installed capacity of small wind turbines in the

United States of 198 MW by the end of 2011 (AWEA 2012b).

Within this market segment, there has been a general trend towards larger, grid-tied systems. Sales of turbines

<1 kW in size (often used off-grid) were flat or even declined from 2006-11, averaging roughly 2-3 MW per

year. Sales of 1-10 kW turbines (often used in the grid-tied residential market), on the other hand, grew from

less than 2 MW in 2006 to more than 8 MW in 2010, before dropping to approximately 6 MW in 2011. Sales of

11-100 kW turbines (often used in the grid-tied commercial / light industrial / government market) grew from

around 3 MW in 2006 to more than 15 MW in 2010, before dropping to roughly 12 MW in 2011 (AWEA

2012b).

Year

Annual Sales of Small Wind Turbines (≤ 100 kW) into the United States

Number of Turbines

Capacity Additions

Sales Revenue

2005

4,324

3.3 MW

$11 million

2006

8,330

8.6 MW

$36 million

2007

9,102

9.7 MW

$43 million

2008

10,386

17.4 MW

$74 million

2009

9,820

20.4 MW

$91 million

2010

7,811

25.6 MW

$139 million

2011

7,303

19.0 MW

$115 million

Source: AWEA (2012b)

Sales in this sector have historically been driven – at least in part – by a variety of state incentive programs. In

addition, wind turbines equal to or under 100 kW in size are eligible for an uncapped 30% federal investment tax

credit (in place through 2016). The Section 1603 Treasury Grant Program and programs administered by the

USDA have also played a role in the recent growth of the sector. The decline in U.S. sales in 2011 is attributed

by AWEA (2012b) in part to inconsistent state incentives, with several states suspending or defunding their

small wind incentive programs in 2011, as well as the poor state of the U.S. economy.

2011 Wind Technologies Market Report

contributed roughly 32% of the new nameplate capacity added to the U.S. electrical grid in 2011,

compared to 25% in 2010, 42% in 2009, 43% in 2008, 34% in 2007, 18% in 2006, 12% in 2005,

and less than 4% from 2000 through 2004 (Figure 2).

10%

20%

30%

40%

50%

100

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

Total Annual Capacity Additions (GW)

Wind

Gas

Coal

Other Renewable

Other Non-Renewable

Wind (% of Total)

Wind Capacity Additions

(% of Total Annual Capacity Additions)

Source: EIA, Ventyx, AWEA, IREC, SEIA/GTM, Berkeley Lab

Figure 2. Relative Contribution of Generation Types in Annual Capacity Additions

EIA’s (2012) reference-case forecast projects that total U.S. electricity supply will need to

increase at an average pace of roughly 35 TWh (0.8%) per year from 2011 to 2035 in order to

meet demand growth. On an energy basis, the annual amount of electricity expected to be

generated by the new wind power capacity added in 2011 represents roughly 54% of this average

annual projected growth in supply. By extension, if wind power additions continued through

2035 at the same pace as in 2011, then roughly 54% of the nation’s projected increase in

electricity generation from 2011 through 2035 would be met with wind electricity. Although

future growth trends are hard to predict, it is clear that a significant portion of the country’s new

generation needs is already being met by wind energy.

The United States Remained the Second Largest Market in Annual and

Cumulative Wind Power Capacity Additions, but Was Well Behind the

Market Leaders in Wind Energy Penetration

On a worldwide basis, a record of roughly 42,000 MW of wind power capacity was added in

2011, up 6% from the additions experienced in 2010 and bringing the cumulative total to

241,000 MW (BTM 2012; Table 1).

In terms of cumulative capacity, the United States ended

Yearly and cumulative installed wind power capacity in the United States are from the present report, while global

wind power capacity comes from BTM (2012), but updated with the U.S. data presented here. Some disagreement

exists among these data sources and others, e.g., Windpower Monthly, the Global Wind Energy Council, and

AWEA.

2011 Wind Technologies Market Report

the year with almost 20% of total global wind power capacity, but is now a distant second to

China by this metric (Table 1).

Over the past 10 years, cumulative wind power capacity has

grown by an average of 27% per year in the United States, somewhat higher than the 25%

growth rate globally. Annual growth in cumulative capacity was down in 2011, however, at 16%

for the U.S. and 21% globally.

After leading the world in annual wind power capacity additions from 2005 through 2008, the

U.S. has now – for three years – been second to China (Table 1), representing roughly 16% of

global installed capacity in 2011, up slightly from 13% in 2010, but down substantially from

26% in 2009, 30% in 2008, and 27% in 2007. China now dominates global wind power

rankings, with an approximate 42% share of the global market for new wind power additions in

2011. India, Germany, and the U.K. rounded out the top five countries in 2011 for annual

capacity additions.

Table 1. International Rankings of Wind Power Capacity

Annual Capacity

(2011, MW)

Cumulative Capacity

(end of 2011, MW)

China 17,631 China 62,412

U.S. 6,816 U.S. 46,916

India 3,300 Germany 29,248

Germany 2,007 Spain 21,350

U.K. 1,293 India 16,266

Canada 1,267 U.K. 7,155

Spain 1,050 France 6,836

Italy 950 Italy 6,733

France 875 Canada 5,278

Sweden 763 Portugal 4,214

Rest of World

5,766

Rest of World

34,453

TOTAL 41,718 TOTAL 240,861

Source: BTM Consult; AWEA project database for U.S. capacity

A number of countries are beginning to achieve relatively high levels of wind energy penetration

in their electricity grids. Figure 3 presents data on end-of-2011 (and end-of-2006/07/08/09/10)

installed wind power capacity, translated into projected annual electricity supply based on

assumed country-specific capacity factors, and divided by projected 2012 (and actual or

projected 2007/08/09/10/11) electricity consumption. Using this approximation for the

contribution of wind power to electricity consumption, and focusing only on the 20 countries

with the greatest cumulative installed wind power capacity, end-of-2011 installed wind power is

estimated to supply the equivalent of roughly 29% of Denmark’s electricity demand, 19% of

Portugal’s, 19% of Spain’s, 18% of Ireland’s, and 11% of Germany’s. In the United States, the

cumulative wind power capacity installed at the end of 2011 is estimated, in an average year, to

equate to roughly 3.3% of the nation’s electricity demand (up from 2.9% at the end of 2010, and

Wind power additions and cumulative capacity in China are from BTM (2012), and include a considerable amount

of capacity that was installed but that had not yet begun to deliver electricity by the end of 2011, due to a lack of

coordination between wind developers and transmission providers, and the lengthier time that it takes to build

transmission and interconnection facilities. All of the U.S. capacity reported here, on the other hand, was capable of

electricity delivery.

2011 Wind Technologies Market Report

just 0.9% at the end of 2006).

On a global basis, wind energy’s contribution at the end of 2011

is estimated to be 2.9%.

Source: Berkeley Lab estimates based on data from BTM Consult, EIA, and elsewhere

Figure 3. Approximate Wind Energy Penetration in the Twenty Countries with the

Greatest Installed Wind Power Capacity

California Added More New Wind Power Capacity than Any Other State,

While Six States Are Estimated to Exceed 10% Wind Energy Penetration

New large-scale

wind turbines were installed in 30 states in 2011. With 921 MW installed,

California added the most new wind capacity in 2011, ending Texas’ six-year reign (Texas fell to

ninth place in 2011, with 297 MW). As shown in Figure 4 and Table 2, other leading states in

terms of new capacity (each with more than 500 MW) included Illinois, Iowa, Minnesota,

Oklahoma, and Colorado. Nineteen states added more than 100 MW each in 2011.

On a cumulative basis, Texas remained the clear leader among states, with 10,394 MW installed

at the end of 2011 – more than 6,000 MW more than the next-highest state (Iowa, with 4,322

MW). In fact, Texas has more installed wind power capacity than all but five countries

(including the U.S.) worldwide. States following (distantly) Texas in cumulative installed

capacity include Iowa, California, Illinois, Minnesota, Washington, Oregon, and Oklahoma – all

with more than 2,000 MW. Twenty-nine states had more than 100 MW of wind capacity

installed as of the end of 2011, with twenty of these topping 500 MW, eight topping 2,000 MW,

In terms of actual 2011 deliveries, EIA reports that wind energy represented 2.9% of net electricity generation and

3.2% of national electricity consumption in the United States. These figures are below the 3.3% figure provided

above in part because 3.3% is a projection based on end-of-year 2011 wind power capacity.

“Large-scale” turbines are defined consistently with the rest of this report – i.e., turbines over 100 kW.

10%

12%

14%

16%

18%

20%

22%

24%

26%

28%

30%

Denmark

Portugal

Spain

Ireland

Germany

Greece

Sweden

Netherlands

Italy

India

Poland

U.S.

France

China

Turkey

Australia

Canada

Brazil

Japan

TOTAL

Approximate Wind Penetration, end of 2011

Approximate Wind Penetration, end of 2010

Approximate Wind Penetration, end of 2009

Approximate Wind Penetration, end of 2008

Approximate Wind Penetration, end of 2007

Approximate Wind Penetration, end of 2006

Estimated Wind Generation as a

Proportion of Electricity Consumption

2011 Wind Technologies Market Report

and one (Texas) topping 10,000 MW. Although all wind power projects in the United States to

date have been installed on land, offshore development activities continued in 2011, as discussed

in the next section.

Note: Numbers within states represent cumulative installed wind capacity and, in parentheses, annual additions in 2011.

Figure 4. Location of Wind Power Development in the United States

Some states are beginning to realize relatively high levels of wind energy penetration. The right

half of Table 2 lists the top 20 states based on both actual wind electricity generation in 2011 as

well as estimated wind electricity generation from end-of-2011 wind power capacity, both

divided by total in-state electricity generation in 2011.

Using either method, the same four

upper Midwest states – North and South Dakota, Minnesota, and Iowa – lead the list (though in a

slightly different order). Most notably, the wind power capacity installed in South Dakota and

Iowa as of the end of 2011 is estimated, in an average year, to supply approximately 22% and

Wind energy penetration can either be expressed as a percentage of in-state load or in-state generation. In-state

generation is used here, primarily because wind energy (like other energy resources) is often sold across state lines,

which tends to distort penetration levels expressed as a percentage of in-state load. The actual penetration of wind

electricity generation in 2011 is based exclusively on preliminary EIA data for 2011, and matches what AWEA

provides in its U.S. Wind Industry Annual Market Report (AWEA 2012a). For the estimated penetration – which

captures the full, rather than partial, impact of new wind power capacity added in 2011 – end-of-2011 wind power

capacity is translated into estimated annual wind generation based on estimated state-specific capacity factors that

derive from the project performance data reported later in this report. The resulting state-specific wind electricity

generation estimates are then divided by preliminary EIA data on total in-state electricity generation in 2011.

2011 Wind Technologies Market Report

20%, respectively, of all in-state electricity generation. Four other states are also estimated to

exceed 10% penetration by this metric: Minnesota (14.9%), North Dakota (14.1%), Colorado

(10.7%), and Oregon (10.5%).

Table 2. United States Wind Power Rankings: The Top 20 States

Capacity (MW)

Percentage of In-State Generation

Annual (2011)

Cumulative (end of 2011)

Actual (2011)*

Estimated (end of 2011)**

California

921

Texas

10,394

South Dakota

22.3%

South Dakota

22.1%

Illinois

692

Iowa

4,322

Iowa

18.8%

Iowa

20.0%

Iowa

647

California

3,917

North Dakota

14.7%

Minnesota

14.9%

Minnesota

542

Illinois

2,742

Minnesota

12.7%

North Dakota

14.1%

Oklahoma

525

Minnesota

2,718

Wyoming

10.1%

Colorado

10.7%

Colorado

506

Washington

2,573

Colorado

9.2%

Oregon

10.5%

Oregon

409

Oregon

2,513

Kansas

8.2%

Idaho

9.7%

Washington

367

Oklahoma

2,007

Idaho

8.2%

Kansas

9.2%

Texas

297

Colorado

1,805

Oregon

8.2%

Oklahoma

9.1%

Idaho

265

North Dakota

1,445

Oklahoma

7.1%

Wyoming

8.8%

Michigan

213

Wyoming

1,412

Texas

6.9%

Texas

7.3%

Kansas

200

New York

1,403

New Mexico

5.4%

Maine

6.5%

Wisconsin

162

Indiana

1,340

Washington

5.3%

New Mexico

5.8%

West Virginia

134

Kansas

1,274

Maine

4.5%

Washington

5.5%

Maine

131

Pennsylvania

789

Montana

4.2%

California

4.7%

New York

129

South Dakota

784

California

4.0%

Montana

3.8%

Nebraska

125

New Mexico

750

Illinois

3.1%

Illinois

3.7%

Utah

102

Wisconsin

631

Hawaii

3.1%

Hawaii

3.7%

Ohio

102

Idaho

618

Nebraska

2.9%

Indiana

3.0%

South Dakota

West Virginia

564

Indiana

2.7%

Nebraska

2.9%

Rest of U.S.

274

Rest of U.S.

2,915

Rest of U.S.

0.4%

Rest of U.S.

0.5%

TOTAL

6,816

TOTAL

46,916

TOTAL

2.9%

TOTAL

3.2%

* Based on 2011 wind and total generation by state from EIA’s Electric Power Monthly.

** Based on a projection of wind electricity generation from end-of-2011 wind power capacity, divided by total in-state electricity

generation in 2011.

Source: AWEA project database, EIA, Berkeley Lab estimates

No Offshore Turbines Have Been Commissioned in the United States, but

Offshore Project and Policy Developments Continued in 2011

At the end of 2011, global offshore wind power capacity stood at roughly 4,000 MW (BTM

2012), with the vast majority of 2011 additions and cumulative capacity located in Europe. Just

470 MW of new offshore wind power capacity was commissioned in 2011, a two-thirds decrease

from 2010, though BTM (2012) reports that more than 1,500 MW are likely to be installed in

2012.

A companion report funded by the U.S. Department of Energy that focuses exclusively on offshore wind energy

will be published later this year, and will provide a detailed summary of the status of the offshore wind sector in the

United States.

2011 Wind Technologies Market Report

To date, no offshore projects have been installed in the United States, and the emergence of a

U.S. offshore wind power market faces both challenges and opportunities. Perhaps most

importantly, the projected near-term costs of offshore wind energy remain high. Additionally,

planning, siting, and permitting can be challenging, as demonstrated in the long history of the

Cape Wind project. At the same time, interest in developing offshore wind energy exists in

several parts of the country. Driving this interest is the proximity of offshore wind resources to

population centers, the potential for local economic development benefits, advances in

technology, and superior capacity factors (and, in some instances, peak load coincidence)

compared to the finite set of developable land-based wind power projects available in some

regions. Moreover, significant strides relating to offshore wind energy have been made recently

in the federal arena, both through the Department of the Interior's responsibilities with regards to

regulatory approvals and the Department of Energy's investments in offshore R&D.

Figure 5. Proposed Offshore Wind Power Projects in a Relatively Advanced State of

Development

Figure 5 identifies ten proposed offshore wind power projects in the United States that have been

identified by Navigant Consulting as being more-advanced in development process: generally,

this includes projects that have signed power purchase agreements, those with a partnership with

a potential power offtaker, those that are pursuing detailed surveying/permitting efforts, and

2011 Wind Technologies Market Report

those that are expecting to install demonstration or pilot-phase turbines in the relatively near

future. In total, these proposed projects equal 3,800 MW, and are primarily located in the

Northeast and Mid-Atlantic, though proposed projects also exist in the Great Lakes and Gulf of

Mexico. It is not certain which of these projects will ultimately come to fruition, while many

other proposed projects not listed in Figure 5 are in earlier planning phases.

Of the projects identified in Figure 5, two have signed power purchase agreements (PPAs): Cape

Wind (Massachusetts) and Deepwater Wind (Rhode Island). The nation's first offshore wind

PPA, for NRG Bluewater’s project off the coast of Delaware, was canceled by the developer in

2011.

Data from Interconnection Queues Demonstrate that an Enormous Amount

of Wind Power Capacity Is Under Consideration

One testament to the continued interest in land-based wind energy is the amount of wind power

capacity currently working its way through the major transmission interconnection queues across

the country. Figure 6 provides this information for wind power and other resources aggregated

across 41 different interconnection queues administered by independent system operators (ISOs),

regional transmission organizations (RTOs), and utilities.

These data should be interpreted

with caution: though placing a project in the interconnection queue is a necessary step in project

development, being in the queue does not guarantee that a project will actually get built. In fact,

projects currently in interconnection queues are often very early in the development process. As

a result, efforts have been and are being taken by the Federal Energy Regulatory Commission

(FERC), ISOs, RTOs, and utilities to reduce the number of speculative projects that have – in

recent years – clogged these queues. One consequence of those efforts, as well as perhaps the

uncertain magnitude of the future wind market in the U.S. given the impending scheduled

expiration of federal tax incentives, is that the total amount of wind power capacity in the

nation's interconnection queues has declined in recent years.

The queues surveyed include PJM Interconnection (PJM), Midwest Independent System Operator (MISO), New

York ISO (NYISO), ISO-New England (ISO-NE), California ISO (CAISO), Electric Reliability Council of Texas

(ERCOT), Southwest Power Pool (SPP), Western Area Power Administration (WAPA), Bonneville Power

Administration (BPA), and 32 other individual utilities. To provide a sense of sample size and coverage, the ISOs,

RTOs, and utilities whose queues are included here have an aggregated peak demand of almost 70% of the U.S.

total. Figures 6 and 7 only include projects that were active in the queue at the end of 2011 but that had not yet been

built; suspended projects are not included.

2011 Wind Technologies Market Report

Source: Exeter Associates review of interconnection queues

Figure 6. Nameplate Resource Capacity in 41 Selected Interconnection Queues

Even with this important caveat, the amount of capacity in the nation’s interconnection queues

still provides at least some indication of the amount of wind power development that is in the

planning phase. At the end of 2011, even after reforms by a number of ISOs, RTOs, and utilities

to reduce the number of projects in their queues, there were 219 GW of wind power capacity

within the interconnection queues reviewed for this report – almost five times the installed wind

power capacity in the United States.

This 219 GW represented 45% of all generating capacity

within these selected queues at that time, and was 1.5 times as much capacity as the next-largest

resource, natural gas. In 2011, 40 GW of gross wind power capacity entered the interconnection

queues, compared to 54 GW of natural gas and 25 GW of solar; relatively little nuclear and coal

capacity entered these queues in 2011. Of note, however, is that the absolute amount of wind

and coal power in the sampled interconnection queues (considering gross additions and project

drop-outs) has declined in recent years, whereas natural gas and solar capacity has increased.

Much of this wind power capacity is planned for the Midwest, PJM Interconnection, Texas,

Mountain, Northwest, Southwest Power Pool, and California regions: wind power projects in the

interconnection queues in these regions at the end of 2011 accounted for 96% of the aggregate

219 GW of wind power in the selected queues (Figure 7). Smaller amounts of wind power

capacity were represented in the interconnection queues of the New York ISO (2.6%), ISO-New

England (1.4%), and the Southeast (0.3%).

As a rough benchmark, 300 GW of wind power capacity is the approximate amount of capacity required to reach

20% wind energy penetration in the United States in 2030, as estimated in DOE (2008).

100

150

200

250

Wind Natural Gas Solar Nuclear Coal Other

Nameplate Capacity (GW)

Entered queue in 2011 Total in queue at end of 2011

2011 Wind Technologies Market Report

Source: Exeter Associates review of interconnection queues

Figure 7. Wind Power Capacity in 41 Selected Interconnection Queues

As a measure of the near-term development pipeline, Ventyx (2012) estimates that – as of mid-

June 2012 – approximately 40 GW of wind power capacity was either under construction or in

site preparation (11 GW of the 40 GW total), in-development and permitted (14 GW of the 40

GW), or in-development with pending permit and/or regulatory applications (the remaining 15

GW of the 40 GW total). This total is similar to the 38 GW that was in the development pipeline

as of last year at approximately the same time (April 2011), indicating, potentially, that the

development pipeline remains robust despite political uncertainty at the federal level. AWEA

(2012c), meanwhile, reports 1,695 MW of wind power capacity installed in the first quarter of

2012, with another 8,900 MW under construction as of the end of March 2012.

MISO /

Midwest

PJM ERCOT Mountain Northwest SPP California

ISO

New York

ISO

ISO-New

England

Southeast

Nameplate Wind Power Capacity (GW)

Entered queue in 2011 Total in queue at end of 2011

2011 Wind Technologies Market Report

3. Industry Trends

Despite the Ongoing Proliferation of New Entrants, the “Big Three” Turbine

Suppliers Have Gained U.S. Market Share Since 2009

New U.S. wind projects built in 2011 deployed 2,006 MW of GE Wind turbines, compared to

1,969 MW of Vestas turbines, representing a roughly 29% market share for each manufacturer.

Following GE Wind and Vestas were Siemens (with an 18% market share), Suzlon and

Mitsubishi (both at 5%), Nordex and Clipper (both at 4%), REpower (3%),

and Gamesa (2%).

Other utility-scale (>100 kW) wind turbines installed in the U.S. in 2011 (and that fall into the

“Other” category in Figure 8) were manufactured by Alstom (43 MW), Sany Electric (10 MW),

Vensys (6 MW), Samsung (5 MW), Goldwind (4.5 MW), Hyundai (3.3 MW), Kenersys (2.5

MW), Northern Power Systems (2.3 MW), Sinovel (1.5 MW), Unison (1.5 MW), Nordic

Windpower (1 MW), PowerWind (0.9 MW), and Aeronautica (0.75 MW). This list of turbine

suppliers is increasingly global in nature, with manufacturers no longer hailing just from the

United States, Europe, Japan, and India, but now also from China and South Korea.

Source: AWEA project database

Figure 8. Annual U.S. Market Share of Wind Manufacturers by MW, 2005-2011

Figure 8 and Table 3 depict a notable increase in the number of wind turbine manufacturers

serving the U.S. market since 2005, when just five manufacturers (compared to twenty in 2011)

installed more than 1 MW, and just four manufacturers captured 99% of the market (compared to

the ten it took to reach 99% in 2011). Despite steady growth in the number of turbine

manufacturers serving the U.S. market over time, however, the “big three” turbine suppliers –

GE Wind, Vestas, and Siemens – have, in aggregate, actually gained market share since

2008/2009 (from 66% in both 2008 and 2009 up to 76% in 2011), reversing some of their earlier

Market share reported here is in MW terms, and is based on project installations in the year in question, not

turbine shipments or orders.

As of October 2011, REpower became a wholly owned subsidiary of Suzlon.

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

2005 2006 2007 2008 2009 2010 2011

Other

Acciona

Gamesa

REpower

Clipper

Nordex

Mitsubishi

Suzlon

Siemens

Vestas

GE Wind

Turbine Manufacturer U.S. Market Share

2011 Wind Technologies Market Report

losses through 2008. This recapture may, in part, reflect a legacy of the financial crisis (i.e., a

heightened preference among investors for projects using “bankable” turbines), coupled with

ample turbine supply (relative to demand), which reduces the need to consider less-bankable

technology.

Table 3. Annual U.S. Turbine Installation Capacity, by Manufacturer

Source: AWEA project database

Globally, U.S.-owned GE remained the third-leading supplier of turbines worldwide in 2011,

with an 8.8% market share (down from 9.3% in 2010), behind Vestas’ 12.9% and Goldwind's

9.4% (BTM 2012). No other U.S.-owned manufacturer cracked the top-15.

On a worldwide

basis, Chinese turbine manufacturers continue to occupy positions of prominence: four of the

top ten, and seven of the top 15, leading global suppliers of wind turbines in 2011 hail from

China.

To date, the growth of Chinese turbine manufacturers has been based almost entirely on sales to

the Chinese market. With the Chinese market beginning to show signs of cooling, however,

Chinese (and South Korean) manufacturers have begun to look abroad and penetrate the

international wind turbine market, including with limited sales into Europe and the United States.

In the United States, for example, 2011 installations by Chinese and South Korean manufacturers

included those from Sany Electric (10 MW), Samsung (5 MW), Goldwind (4.5 MW), Hyundai

(3.3 MW), Sinovel (1.5 MW), and Unison (1.5 MW). Many of these early installations have

been developed and financed by the turbine suppliers themselves, and until there is sufficient

operating experience to mitigate uncertainty over turbine quality and bankability, widespread

entry by Chinese suppliers into the U.S. market seems unlikely. Nevertheless, the historically-

dominant wind turbine suppliers in the U.S. market are likely to face growing competition from

new entrants in the coming years.

These statements emphasize the sale of large wind turbines. U.S. manufacturers are major players in the global

market for smaller-scale turbines (AWEA 2012b).

Manufacturer

Turbine Installations (MW)

2005

2006

2007

2008

2009

2010

2011

GE Wind

1,431

1,146

2,342

3,585

3,995

2,543

2,006

Vestas

699

439

948

1,120

1,488

221

1,969

Siemens

573

863

791

1,162

828

1,233

Suzlon

197

738

702

413

334

Mitsubishi

190

128

356

516

814

350

318

Nordex

288

Clipper

470

605

258

REpower

330

172

Gamesa

494

616

600

564

154

Acciona

410

204

Other

TOTAL

2,375

2,454

5,249

8,361

10,000

5,214

6,816

2011 Wind Technologies Market Report

Domestic Wind Turbine and Component Manufacturing Capacity Has

Increased, but Uncertainty in Future Demand Has Put the Wind Turbine

Supply Chain Under Severe Pressure

Faced with substantial expected growth in wind power capacity additions in 2012, but uncertain

prospects after 2012, the wind industry’s domestic supply chain faces conflicting pressures. As

the cumulative capacity of wind power projects has grown, foreign and domestic turbine and

component manufacturers have localized and expanded operations in the United States. In fact,

despite the near-term demand uncertainty, a larger number of new turbine and component

manufacturing facilities (16) opened in 2011 than in 2010 (13). Figure 9 presents a non-

exhaustive list of the 16 wind turbine and component manufacturing and assembly facilities that

opened in 2011, the 10 new manufacturing facilities announced (but not yet built) in 2011, and

the more than 165 existing manufacturing facilities that were open prior to 2011.

Figure 9. Location of Existing and New Turbine and Component Manufacturing Facilities

The data on existing, new, and announced manufacturing facilities presented here differ somewhat from those

presented in AWEA (2012a) due, in part, to methodological differences. In addition, AWEA (2012a) has access to

data on smaller component suppliers that are not included here.

2011 Wind Technologies Market Report

Of the new or announced facilities captured in Figure 9, two are owned by major international

wind turbine original equipment manufacturers (OEMs): Vestas (blades in Brighton, Colorado)

and Alstom (turbines in Amarillo, Texas). In addition, GE opened a new logistics center for

renewable energy components in Mississippi (logistics and research centers are not included in

Figure 9).

Eight of the ten OEMs with the largest share of the U.S. market in 2011 (Alstom, Clipper,

Gamesa, GE, Nordex, Siemens, Suzlon, and Vestas) had one or more operational manufacturing

facilities in the United States in 2011 (Suzlon, however, announced the closure of its facility in

2012). Companies with multiple facilities include Gamesa, GE, Siemens, and Vestas. Other

active domestic and foreign OEMs that have sold larger turbines in the U.S. market and that have

established U.S. manufacturing facilities include Acciona, DeWind, Northern Power Systems,

and Aeronautica, while still other companies have announced their interest in manufacturing but

have not yet installed any utility-scale turbines in the United States. In contrast to the multiple

OEMs operating in 2011, there was only one active utility-scale wind energy OEM assembling

nacelles in the United States as late as 2004 (GE).

The growth in U.S. wind turbine manufacturing capability and the drop in wind power plant

installations since 2009 led to an estimated over-capacity of U.S. turbine nacelle assembly

capability of more than 5 GW in 2011, in comparison to 4 GW of under-capacity in 2009

(Figure 10). Over-capacity is defined here as maximum turbine nacelle assembly capacity in

the U.S. exceeding total turbine demand in the U.S. Because maximum factory utilization is

uncommon, some level of over-capacity should not be considered problematic. On the other

hand, actual over-capacity at U.S. nacelle assembly facilities likely exceeded these estimates

because U.S. demand for wind turbines is also partially met with imports from other countries

(see next section), leading to U.S. nacelle assembly facilities operating at well below their

maximum capability in 2011.

With maximum domestic turbine nacelle assembly capacity

predicted by Bloomberg NEF (2012a) to stabilize at approximately 13 GW in the near term,

over-capacity relative to U.S. turbine demand (not considering imports or exports of turbines)

is anticipated to be severe in 2013 and 2014 when wind power capacity additions are expected

to decline (see Section 8, “Future Outlook”).

Vestas, however, announced the cancellation of its planned R&D facility in Massachusetts in early 2012.

Nacelle assembly is defined here as the process of combining the multitude of components included in a turbine

nacelle to produce a complete turbine nacelle unit.

Exports of wind turbines from U.S. nacelle assembly facilities to other countries have the ability to reduce the

estimated over-capacity, but as shown in the next section, U.S. exports have been relatively modest to date.

2011 Wind Technologies Market Report

2006

2007

2008

2009

2010

2011

2012e

2013e

2014e

Wind Turbine Nacelle Assembly Capacity in the

U.S. (and Wind Turbine Installations) (GW)

Other

Nordex

Gamesa

Siemens

Vestas

U.S. Turbine

Installations

Source: Bloomberg New Energy Finance

Figure 10. Domestic Wind Turbine Nacelle Assembly Capacity and Demand

Beyond nacelle assembly, Figure 9 shows a good number of new component manufacturing

facilities announced or opened in 2011. Figure 11 segments the manufacturing facilities

operating in the U.S. by major component, including those that opened prior to and in 2011 (the

figure excludes announced but not yet opened facilities).

Note: Manufacturing facilities that produce multiple components are included in multiple bars.

Source: National Renewable Energy Laboratory

Figure 11. Number of Operating Wind Turbine and Component Manufacturing Facilities

on U.S. Soil

100

Other Nacelle

Components

Towers Blades Turbines

Number of Manufacturing Facilities

Opened in 2011

Open before 2011

2011 Wind Technologies Market Report

Though new and announced turbine and component manufacturing facilities are spread across

the country, a number of component manufacturers are choosing to locate in markets with

substantial wind power capacity or near already established large-scale OEMs. For example, in

2011, four component suppliers opened or announced facilities in Texas, a state with both

substantial historical wind power additions and a strong wind turbine and component

manufacturing base. Two new component manufacturing facilities were opened or announced

in both Colorado and Michigan; both states are strategically positioned geographically near

large wind power markets, therefore allowing for reduced transportation challenges and costs.

Even states that are relatively far-removed from major wind power markets – including several

states in the Southeast – have seen new wind turbine and component manufacturing facilities

come online in recent years. Workforce considerations, transportation costs, and state and local

incentives are among the factors that typically drive location decisions.

AWEA (2012a) estimates that the wind energy industry directly and indirectly employed

75,000 full-time

workers in the United States at the end of 2011 – equal to the jobs reported

in 2010 but fewer than in 2008 and 2009. The 75,000 jobs include manufacturing (which

accounts for 30,000 jobs), project development, construction and turbine installation,

operations and maintenance, transportation and logistics, and financial, legal, and consulting

services.

Notwithstanding these developments, policy uncertainty and unfavorable market conditions (e.g.,

low wholesale power prices and competition amount turbine and component suppliers) are

straining the wind industry's manufacturing supply chain, as margins drop and concerns about

manufacturing overcapacity deepen, potentially setting the stage for significant layoffs. As noted

earlier, maximum nacelle assembly capacity in the U.S. (as well as component manufacturing in

some cases) substantially exceeds post-2012 near-term expected demand for wind in the U.S.,

yielding relatively lower utilization of the production capacity of existing facilities, downward

pressure on component and turbine pricing, and compressed manufacturer profit margins.

Reportedly in part as a result, Mitsubishi – the OEM with the 5

-largest amount of U.S.

installations in 2011 – announced in early 2012 that it would indefinitely delay the opening of its

Fort Smith, Arkansas manufacturing facility. UTC, meanwhile, announced that it was seeking to

sell Clipper, while a wide range of OEMs – including GE, Vestas, Siemens, Nordex, Gamesa,

Goldwind, and Sinovel – have recently announced weakened financial results. Consequently,

Vestas has indicated that it will lay off 182 people in the U.S. and is prepared to make further

and more-substantial cuts if the PTC is not extended. Gamesa, NRG, Clipper, Iberdrola, EDP

Renewables North America, and others have also recently announced cuts to their U.S.

workforce, demonstrating that elements of the entire supply chain, from OEMs to developers, are

at risk.

Jobs are reported as full-time equivalents. For example, two people working full-time for six months are equal to

one full-time job in that year.

2011 Wind Technologies Market Report

A Growing Percentage of the Equipment Used in U.S. Wind Power Projects

Has Been Sourced Domestically in Recent Years

As a result of the aforementioned developments in U.S.-based wind turbine and component

manufacturing, the share of domestically manufactured wind turbines and components has grown

in recent years, while the import share has witnessed a corresponding drop. These trends are

supported by an analysis of data from the U.S. Department of Commerce.

Figure 12 presents calendar-year data on estimated U.S. imports of wind-related equipment from

2005 through 2011.

Specifically, the figure shows imports of wind-powered generating sets

(i.e., nacelles and, when imported with the nacelle, other turbine components) as well as imports

of turbine components that are shipped separately from the generating sets.

The separate

importation of selected wind turbine components includes towers as well as other wind turbine

components (specifically, generators, blades and other components, and gearboxes). Estimates

provided for these component-level imports in Figure 12 should be viewed with caution because

the underlying data used to produce the figure are based on trade categories that are not exclusive

to wind energy (e.g., they could include generators for non-wind applications). The component-

level import estimates shown in Figure 12 therefore required assumptions about the fraction of

larger trade categories likely to be represented by wind turbine components. The error bars

included in Figure 12, meanwhile, account for uncertainty in these assumed fractions.

The Department of Commerce trade data are accessed through the U.S. International Trade Commission’s

(USITC) DataWeb, which compiles statistics from the Department of Commerce on imports and exports. The

statistics can be queried online at: http://dataweb.usitc.gov/. The analysis presented here relies on the ‘customs

value’ of imports as opposed to the ‘landed value.’ For more information on these data and their application to wind

energy, see David (2009, 2010, 2011).

“Wind-powered generating sets” are in Harmonized Tariff Schedule (HTS) 8502.31.0000. This HTS provision

includes both utility-scale and small wind turbines. Estimating separate wind turbine component imports is

complicated by the fact that the HTS does not contain provisions that are exclusive to wind turbine components.

Included in the analysis presented here are: HTS 7308.20.0000 – “towers and lattice masts” (available for years

2005-2010); HTS 7308.20.0020 – “towers and lattice masts - tubular” (available for 2011 only); HTS 8501.64.0020

– “AC generators (alternators) from 750 to 10,000 kVA”; HTS 8412.90.9080 – “other parts of engines and motors”;

HTS 8503.00.9545 – “parts of generators (other than commutators, stators, and rotors)”; HTS 8483.40.5010 – “fixed

ratio speed changers”; and HTS 8483.40.5050 – “multiple and variable ratio speed changers.”

Wind turbine components such as blades, towers, generators, and gearboxes are included in the data on wind-

powered generating sets if shipped with the nacelle. Otherwise, these component imports are reported separately.

Given the split of the "towers and lattice masts" HTS classification into “tubular” and “other” in 2011, we

calculated the 2011 ratio of “tubular” tower imports (all of which are assumed to be wind-related) to the sum of

“tubular” and “other” tower and lattice mast imports. Using this ratio and considering overall U.S. import levels of

wind-related equipment, it is assumed that the proportion of towers and lattice masts imports from 2005-2010 that

are related to towers used in U.S. wind power plants increases from 80% in 2005 to 90% in 2008, before decreasing

to 80% in 2010. Based on a review of the countries of origin for the imports, personal communications with USITC

and AWEA staff, David (2010), and Wyden (2010), the proportion of wind-related equipment in the five other

relevant HTS provisions (i.e., wind turbine components other than towers) is assumed to increase from 40% in 2005

to 55% in 2008, before dropping back to 40% in 2010, and staying at 40% in 2011. These trends are intended to

reflect, in part, the rapidly increasing imports of wind equipment from 2005-2008, and the subsequent decline in

imports from 2008-2010, before steadying in 2011. To reflect uncertainty in these proportions, a ±15% variation is

applied to the trade categories that include wind turbine components other than towers, and a ±5% variation is

applied to the category that includes wind turbine towers.

2011 Wind Technologies Market Report

Source: Berkeley Lab analysis of data from USITC DataWeb: http://dataweb.usitc.gov

Figure 12. Estimated Imports of Wind-Powered Generating Sets, Towers, and Other Wind

Turbine Components, as Well as Exports of Wind-Powered Generating Sets

As shown, estimated imports of wind-related equipment into the United States substantially

increased from 2005-2008, before falling dramatically through 2010 and then increasing

somewhat in 2011. These overall trends are driven primarily by changes in the share of

domestically manufactured wind turbines and components (versus imports) as well as changes in

the annual rate of wind power capacity installations and wind turbine prices.

Figure 12 also shows that exports of wind-powered generating sets from the United States have

increased, rising from $15 million in 2007 to $147 million in 2010, and staying relatively

constant at $149 million in 2011. The largest destination markets for these exports over the

entire 2005-2011 timeframe have included Canada (54%), Brazil (19%), Mexico (10%), China

(6%), and Honduras (4%), while 2011 exports were dominated by Brazil (67%), Honduras

(16%), Mexico (8%), and Canada (8%). Wind turbine component exports (towers, blades,

gearboxes, generators) are not shown in the figure because such exports are likely a small and/or

uncertain fraction of the broader trade category totals.

Despite some long-term growth in

exports, it is clear from these data that the U.S. remained a sizable net importer of wind turbine

equipment over the entire 2005 to 2011 timeframe.

U.S. exports of ‘towers and lattice masts’ in 2011 totaled $102 million, however, with the largest destination

markets being Canada (42%), Costa Rica (14%), and Mexico (11%). The U.S. ITC data for tower exports do not

differentiate between tubular towers (used in wind power applications) and other types of towers, unlike the import

classification for 2011. Though it is likely that most of these tower exports are wind-related, the exact proportion is

not known and hence the $102 million figure should be viewed with some caution.

2005

2375 MW

2006

2454 MW

2007

5249 MW

2008

8361 MW

2009

10000 MW

2010

5214 MW

2011

6816 MW

Billion US $2011

Other Wind Turbine Components

To wers

Wind-Powered Generating Sets

Estimated US Imports

Exports of Wind-Powered

Generating Sets

2011 Wind Technologies Market Report

Looking behind the import data presented in Figure 12 in more regional detail, Figure 13 shows

a number of trends in the origin of the U.S. imports of wind-powered generating sets and

towers.

The primary source markets for wind-powered generating sets during the 2005-2011

period have been the home countries of the major international turbine manufacturers: Denmark,

Spain, Japan, India, and Germany. The obvious exception is Italy, which is not “home” to a

major wind turbine manufacturer, though Vestas, at least, has blade and nacelle manufacturing

facilities there. Offsetting the recent increase in Italy's share (as well as the lesser increase in

Denmark's contribution from 2009-2011) has been a notable recent decline in the share of

imports from Japan, Spain, and the India.

The countries of origin for tower imports are only

reported for the year 2011, as the proportion of tower imports that were wind-related for each

country is not known for years 2005-2010, before the HTS classification that contains towers

was split into a tubular and “other” category. In 2011, the share of imports of tubular towers

from Asia was over 80%, with a sizable proportion of the imports from China, Vietnam, and

Korea, as well as from Canada and Mexico; unlike for wind-powered generating sets, the share

of tower imports from Europe is minor. Responding to a case brought by a number of U.S. tower

manufacturers, in May 2012 the U.S. Commerce Department issued a preliminary ruling that will

impose additional duties on Chinese towers imported into the United States. Once finalized, this

trade case may impact the magnitude and source countries of tower imports to the U.S. in years

to come.

20%

40%

60%

80%

100%

2005

2006

2007

2008

2009

2010

2011

Other

Wind-Powered Generating Sets

Asia

Europe

Asia

44%

18%

14%

To w e r s - 2011

China

Vietnam

Korea

Other

Asia

Canada

Mexico

All Europe

1 5

Source: Berkeley Lab analysis of data from USITC DataWeb: http://dataweb.usitc.gov

Figure 13. Origins of Imports of Wind-Powered Generating Sets and Towers

Only the origin of imports for “wind-powered generating” sets and “towers” are presented in Figure 13 because

the other five trade categories that sum to “other wind turbine components” in Figure 12 are assumed to have

smaller proportions of wind-related equipment.

Over the entire 2005-2011 timeframe, the largest source countries for wind-powered generating sets were:

Denmark (42%), Spain (16%), Japan (13%), India (10%), and Germany (8%) (in 2011, the top three countries were

Denmark (55%), Italy (24%), and Germany (8%)).

2011 Wind Technologies Market Report

Though Figures 12 and 13 depict a U.S. market that remains reliant on imports of wind power

equipment, that reliance has declined over time as growth in installed wind power capacity has

outpaced wind turbine and component imports. To estimate the percentage share of imports and

domestic manufacturing over time, one must account for the fact that turbines, towers, and other

components imported at the end of one year may not be installed until the following year. As

such, in Figure 14 the combined imports of wind-powered generating sets and selected turbine

components are determined by using a 4-month lag (i.e., monthly import data from September of

the previous year to August of the current year are used to estimate the value of imports in wind

turbine installations in the current year). Those import figures are then compared to total wind

turbine equipment-related costs on a calendar-year basis.

Data from 2005-2010 are averaged

over two-year periods to further avoid “noise” in the resulting estimates. The error bars

correspond to those in Figure 12, and represent the uncertainty in the proportion of wind-related

equipment imports in certain larger trade categories.

Figure 14. Estimated Wind Power Equipment Imports as a Fraction of Total Turbine Cost

Ultimately, when presented as a fraction of total equipment-related turbine costs in this fashion,

the overall import fraction is found to have declined considerably, from 65% in 2005-2006 to

33% in 2011 (conversely, domestic content has increased from 35% in 2005-2006 to 67% in

2011). Reporting these figures as a proportion of total wind project installed costs (not just wind

turbine equipment-related costs) is also of interest, but is complicated by the fact that non-turbine

balance-of-plant costs may also involve some level of imports. Nonetheless, if one simply

assumes that 80% of non-turbine-equipment balance-of-plant costs derive from domestic sources

with the remaining 20% from imports, then the import fraction for total wind project installed

Total wind turbine costs ($/kW) are assumed to equal approximately 75% of the average project-level costs

reported later in this report in Figure 20, while wind turbine equipment-related costs are assumed to equal 85% of

total wind turbine costs (with the remaining 15% consisting of transportation, project management, and other soft

costs). To calculate total calendar-year wind turbine equipment-related costs, this wind turbine equipment-related

cost figure in $/kW is multiplied by annual wind power capacity installations.

2005-2006 2007-2008 2009-2010 2011

Imports as Fraction of Turbine Cost

Billion US$2011

Average Annual Turbine Equipment Cost

(Calendar Year)

Value of Selected Imports

(Customs value, 4 month lag, Sept - Aug)

Estimated Import Fraction

50%

40%

30%

60%

70%

10%

20%

2011 Wind Technologies Market Report

costs would equal 48% in 2005-2006 and 28% in 2011 (i.e., domestic content would equal 52%

in 2005-2006 and 72% in 2011).

These figures should be considered rough approximations for the reasons stated earlier, and may

understate the wind power industry’s reliance on turbine and component imports because it is

possible that imports of wind power equipment are occurring under other trade categories that

are not captured here. Nonetheless, these figures demonstrate that a growing amount of the

equipment used in wind power projects has been sourced domestically in recent years. Whether

that trend continues in the future may depend on the size and stability of the U.S. wind power

market as well as the manufacturing strategies of emerging turbine manufacturers from Asia and

elsewhere.

The Average Nameplate Capacity, Hub Height, and Rotor Diameter of

Installed Wind Turbines Increased

The average nameplate capacity of wind turbines that were newly installed in the United States

in 2011 increased to roughly 1.97 MW (Figure 15), up from 1.80 MW in 2010. This was the

largest single-year increase in more than six years. Since 1998-99, average turbine nameplate

capacity has increased by 174%.

Source: AWEA project database

Figure 15. Average Turbine Nameplate Capacity Installed During Period (only turbines >

100 kW)

Figure 15 (as well as a number of the other figures and tables included in this report) combines data into both one-

or two-year periods in order to avoid distortions related to small sample size in the PTC lapse years of 2000, 2002,

and 2004; though not a PTC lapse year, 1998 is grouped with 1999 due to the small sample of 1998 projects.

0.72 MW

0.89 MW

1.23 MW

1.46 MW

1.60 MW

1.65 MW

1.67 MW

1.74 MW

1.80 MW

1.97 MW

0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

2.25

1998-99 2000-01 2002-03 2004-05 2006 2007 2008 2009 2010 2011

1,431 1,974 1,687 1,900 1,530 3,190 5,014 5,736 2,902 3,464

1,029 1,751 2,080 2,769 2,453 5,249 8,360 9,997 5,210 6,816

COD:

Turbines:

MW :

Average Turbine Size (MW)

2011 Wind Technologies Market Report

Table 4 shows how the distribution of turbine nameplate capacity has shifted over time: nearly

42% of all turbines installed in 2011 had a nameplate capacity larger than 2.0 MW, up

significantly from 28% in 2010, 24% in 2009, 20% in 2008, 16% in both 2007 and 2006, and just

0.1% or less in years prior to 2006. GE’s 1.5/1.6 MW wind turbine remained the nation’s most-

popular turbine in 2011, with 1,170 units installed (709 of the 1.5 MW version, and 461 of the

1.6 MW version), equating to 26% of all wind power capacity installed in 2011.

Table 4. Size Distribution of Number of Turbines over Time (only turbines > 100 kW)

Years:

1998-99

2000-01

2002-03

2004-05

2006

2007

2008

2009

2010

2011

# MW:

1,029

1,751

2,080

2,769

2,453

5,249

8,360

9,997

5,210

6,816

# turbines:

1,431

1,974

1,687

1,900

1,530

3,190

5,014

5,736

2,902

3,464

Turbine Size

Range (MW)

>0.1≤0.5

0.5%

0.2%

0.1%

0.3%

0.0%

0.2%

0.1%

0.2%

>0.5≤1.0

99%

74%

42%

19%

11%

0.2%

>1.0≤1.5

0.0%

26%

45%

56%

54%

49%

54%

49%

52%

21%

>1.5≤2.0

0.4%

13%

24%

18%

23%

16%

21%

20%

37%

>2.0≤2.5

0.0%

0.1%

16%

15%

17%

23%

25%

35%

>2.5≤3.0

0.0%

0.1%

0.0%

Source: AWEA project database

In addition to nameplate capacity ratings, average hub heights and rotor diameters have also

scaled with time. The average hub height of wind turbines installed in the United States in 2011

was 81 meters (Figure 16), up from 79.8 meters in 2010 and 78.9 meters in 2009. Since 1998-

99, the average turbine hub height has increased by 45% (or 25.3 meters), though growth has

slowed in the more recent years. At the upper extreme, 128 turbines installed in 2011 (totaling

239 MW) had hub heights of 100 meters, up from 17 turbines (38.5 MW) in 2010. Not

surprisingly, most of these taller towers have been installed in areas with less-energetic wind

regimes, such as the East and Great Lakes regions (see Figure 30, later, for regional definitions).

Average rotor diameters have increased at a more rapid pace, especially in the last two years: the

average rotor diameter of wind turbines installed in the United States in 2011 was 89 meters

(Figure 16), up from 84.3 meters in 2010 and 81.6 meters in 2009. Since 1998-99, the average

rotor diameter has increased by 86% (or 41.2 meters). At the upper extreme, 810 turbines

installed in 2011 (totaling 1,803 MW) featured rotor diameters of 100 meters or larger, up from

222 turbines (512 MW) in 2010.

These trends in hub height and rotor scaling are one of several factors impacting the project-level

capacity factors highlighted later in this report. Moreover, industry expectations as well as new

turbine announcements (especially to serve lower-wind-speed sites) suggest that significant

further scaling, especially in average rotor diameter, is anticipated in the near term.

A number of pre-existing GE 1.5 MW turbines installed in earlier years have been upgraded to 1.6 MW, but data

on how many or which turbines have been upgraded are not publicly available, and so this change in nameplate

capacity is not reflected in the data presented in this report.

2011 Wind Technologies Market Report

Source: Berkeley Lab

Figure 16. Average Rotor Diameter and Hub Height Installed During Period

Apart from (but related to) turbine size, turbine configuration is also changing somewhat. In

particular, there were 17 direct drive (as opposed to geared) turbines installed in the U.S. in 2011

(totaling 35.3 MW), up from no more than three (totaling no more than 4.5 MW) in any of the

previous three years.

Five turbine manufacturers supplied direct drive units in 2011, up from

two in previous years, with the new entrant Siemens accounting for the largest share (7 turbines

totaling 21 MW).

The number of direct drive turbines installed in the U.S. is expected to grow

further in 2012, as Goldwind has acquired a number of projects (totaling more than 100 MW) to

showcase its 1.5 MW (and 2.5 MW) direct drive turbine, while Siemens will install more than

200 MW of its 3 MW direct drive units at the Bison II and III projects in North Dakota alone.

Project Finance Was a Mixed Bag in 2011, as Debt Terms Deteriorated

While Tax Equity Held Steady

After steady improvement in both the debt and tax equity markets throughout 2010, progress

faltered somewhat in 2011 on the debt side, as the latest Greek/European debt crisis drove a new

round of retrenchment.

AWEA (2012a) reports that roughly 4,000 MW of new wind capacity raised $5.9 billion in debt

in 2011 – down 30% from the $8.4 billion of debt raised by nearly 5,600 MW in 2010. Though

Direct drive technology has been relatively slow to enter the U.S. market – e.g., BTM (2012) reports that as much

as 21% of global wind installations in 2011 featured direct drive turbines – in part because Enercon, a German

leader in direct drive technology, has not entered the U.S. market, while Chinese sales of direct-drive turbines into

the U.S. has been limited.

Other manufacturers supplying direct drive turbines to the U.S. in 2011 include Vensys (4 x 1.5 MW), Goldwind

(3 x 1.5 MW), Northern Power Systems (1 x 2.3 MW), and Unison (2 x 750 kW).

1998-99

1,403

1,001

2000-01

1,974

1,751

2002-03

1,683

2,074

2004-05

1,918

2,734

2006

1,477

2,402

2007

3,190

5,249

2008

5,004

8,349

2009

5,733

9,993

2010

2,901

5,208

2011

3,464

6,816

Rotor Diameter

Hub Height

COD:

Turbines:

MW :

Average Rotor Diameter and Hub Height (m)

2011 Wind Technologies Market Report

AWEA attributes this decline to several rather innocuous factors,

it is also the case that debt

terms – and in particular bank loan tenors – deteriorated in the latter part of 2011, in response to

the unfolding Greek drama and some of the new banking regulations taking hold (e.g., Basel III).

Though 2010 was characterized by a steady lengthening of loan tenors throughout the year –

with 7- to 10-year “mini-perms” stretching to longer maturities (e.g., 10-12 years) and eventually

even to 15- to 18-year fully amortizing deals – by the end of 2011, 10- to 12-year mini-perms

were once again the norm (AWEA 2012d).

In addition, a number of European banks – which

historically have been familiar lenders to U.S. wind projects – dropped out of the market in

response to the financial turmoil emanating from Greece. As a result, bank loan pricing

ratcheted up a bit, with spreads over the London Interbank Offered Rate (LIBOR) reportedly

starting at around 275 basis points (+/- 50 basis points depending on the particulars of the deal)

with a 25 basis point step-up every 3-4 years (AWEA 2012d). With LIBOR trading at around

0.5%, however, and 10-year interest rate swaps priced at roughly 2.25% in 4Q11, all-in interest

rates starting below 6% were, and still are, achievable.

While banks have pulled back somewhat, institutional lenders (e.g., insurance companies)

continue to offer long-term products – e.g., as long as 20 years with full amortization, and also at

all-in interest rates of 6% or less. Some wind project developers have split up their debt

financing in response to this divergence – using banks for their shorter-term borrowing needs

(e.g., construction and cash grant bridge financing) and institutional lenders (or even the bond

market) for long-term permanent debt financing.

In contrast to the weakened debt market, the market for tax equity improved somewhat in 2011.

The total amount of tax equity committed to both wind and solar projects in 2011 increased to $6

billion (up 20% from $5 billion in 2010), but virtually all of this growth came from solar

investments – perhaps a harbinger of the growing competition for tax equity that the wind sector

will increasingly face – while wind investments held steady at around $3.5 billion (Eber 2012).

There were reportedly 19 wind tax equity deals done in 2011: 18 partnership flip structures (five

with project-level debt) and one sale-leaseback (Chadbourne & Parke 2012). Tax equity pricing

has remained fairly stable since late 2009, with yields on “best-in-market” deals reportedly

hovering around 8% on an after-tax, unleveraged basis (Chadbourne & Parke 2012). The pool of

active tax equity investors increased to as many as twenty-two in 2011 (up from around 16 in

2010), but this swelling of the ranks was comprised mostly of returning investors who had

temporarily dropped out of the market, rather than of entirely new investors (Chadbourne &

Parke 2012, Eber 2012). Moreover, one high-profile investor – Google – that had entered the

market in 2010 and made several tax equity investments in wind projects in 2010 and 2011 has

reportedly shifted its investment focus away from tax equity and towards private equity, where it

These factors include a growing preference for the PTC over the Section 1603 cash grant (PTC deals are mostly

financed with tax equity rather than debt), lower PPA prices (which cannot support as much leverage), and two very

large debt-financed projects (including the 845 MW Shepherds Flat project, which closed on a partial DOE

guarantee of $1.3 billion in debt in December 2010) that happened to fall in 2010 rather than 2011 (AWEA 2012a).

A “mini-perm” is a relatively short-term (e.g., 7-10 years) loan that is sized based on a much longer tenor (e.g.,

15-17 years), and therefore requires a balloon payment of the outstanding loan balance upon maturity. In practice,

this balloon payment is often paid from the proceeds of refinancing the loan at that time. Thus, a 10-year mini-perm

might provide the same amount of leverage as a 17-year fully amortizing loan, but with refinancing risk at the end of

10 years. In contrast, a 17-year fully amortizing loan would be repaid entirely through periodic principal and

interest payments over the full tenor of the loan (i.e., no balloon payment required, and no refinancing risk).

2011 Wind Technologies Market Report

can earn higher returns and also feel more like a sponsor than a passive investor (Eber 2012). As

the number of grandfathered Section 1603 grant deals begins to taper off, further attrition of tax

equity investors is possible, as some have indicated that they are not interested in deals that

involve the PTC.

Looking ahead to the remainder of 2012, the looming end-of-year expiration of both the PTC and

the Section 1603 cash grant (for those wind projects that met the end-of-2011 construction start

deadline) dominate the picture. As developers rush to complete projects in advance of these

policy deadlines, the competition for financing will likely increase, as will the cost of capital.

Demand for tax equity could increase disproportionately (relative to debt) as projects

increasingly choose the PTC over the Section 1603 cash grant.

Meanwhile, the ongoing

implementation of more stringent capital adequacy and leverage requirements under the Basel III

Accord likely means that shorter bank loan tenors are here to stay – this could have a particularly

detrimental impact on wind project finance beyond 2012 if the PTC is ultimately not extended or

renewed, which would then make term debt financing more the norm.

IPPs Remain the Dominant Owners of Wind Projects, But Utility Ownership

Increased Significantly in 2011, Largely On the Back of One Utility

Independent power producers (IPPs) continued to dominate the ownership of wind power

projects, owning 73% (4,965 MW) of all new capacity additions in 2011 (Figure 17). On the

back of nearly 600 MW of new capacity built by MidAmerican Energy, however, utility

ownership jumped to nearly 25% – up from roughly 15% in the two previous years – with

investor-owned utilities (IOUs) owning 1,492 MW and publicly owned utilities (POUs) owning

another 204 MW. The remaining 2% (155 MW) of new 2011 wind capacity is owned by “other”

entities that are neither IPPs nor utilities (e.g., towns, schools, commercial customers, farmers).

Of the cumulative installed wind power capacity at the end of 2011, IPPs owned 82% (38,407

MW) and utilities owned 17% (6,357 MW for IOUs and 1,424 MW for POUs), with the

remaining 2% (904 MW) falling into the “other” category.

Some 2012 projects might not have met the end-of-2011 construction start milestone for the grant, and so have no

choice but to take the PTC. More likely, though, most wind projects will willingly choose the PTC because recent

trends in installed project costs and capacity factors have made the PTC more valuable than the grant, at least in

terms of face value. This is likely why AWEA (2012a) finds that 56% of tax equity raised in 2011 went to PTC

deals, compared to just 22% in 2010. This preference for the PTC could further exacerbate any shortage of tax

equity in 2012, as some tax equity investors are only interested in cash grant deals.

Most of these “other” projects, along with some IPP- and POU-owned projects, might also be considered

“community wind” projects that are owned by or benefit one or more members of the local community to a greater

extent than typically occurs with a commercial wind project. One example of a 2011 project that is classified in

Figure 17 as IPP-owned, yet might also be considered a community wind project, is the 40.5 MW Petersburg project

in Nebraska – a C-BED (Community-Based Energy Development) project that is owned by Gestamp (a Spanish

IPP). According to AWEA (2012a), 6.7% of 2011 capacity additions qualified as community wind projects.

2011 Wind Technologies Market Report

Source: Berkeley Lab estimates based on AWEA project database

Figure 17. Cumulative and 2011 Wind Power Capacity Categorized by Owner Type

The dominance of IPP ownership, and the trend towards increasing utility ownership since the

mid 2000s, has been driven by several factors. When wind energy was a small part of the

generation mix, some utilities felt that buying wind power from IPPs was less risky than owning

wind power projects themselves. As utilities have gained comfort with wind power over the

years, however, their interest in ownership has increased for several reasons: IOUs are typically

allowed to earn a regulated return on project ownership (i.e., by adding it to their rate base) but

not on power purchases; some credit rating agencies consider long-term power purchase

agreements to be debt-like instruments, thereby potentially negatively impacting a utility's credit

rating; and ownership places the utility in a position of greater control over project development,

operations, and eventually repowering. More recently, as the tax equity market dried up in the

wake of the financial crisis of 2008/2009, IOUs were left as one of the few natural wind project

investors with a steady and sizable tax liability

– some of the utility-owned wind projects built

in 2011 were conceived at that time. With most of these drivers still in place, utility ownership

may continue to increase in the coming years.

Long-Term Contracted Sales to Utilities Remained the Most Common Off-

Take Arrangement, but Scarcity of Power Purchase Agreements and

Looming PTC Expiration Drove Continued Merchant Development

Electric utilities continued to be the dominant off-takers of wind power in 2011 (Figure 18),

either owning (25%) or buying (51%) power from 76% of the new capacity installed last year

(with the 76% split between 63% IOU and 13% POU). On a cumulative basis, utilities own

Earlier, in 2005, the internal revenue service (IRS) clarified that a utility’s customers are “unrelated” for the

purposes of satisfying the requirement in Section 45 of the tax code that power must be sold to an unrelated party in

order to qualify for the PTC. As such, utilities that own wind projects and sell the wind generation to their

ratepayers (rather than on the wholesale power market) are entitled to claim the PTC on that wind generation.

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Other

Publicly Owned Utility (POU)

Investor-Owned Utility (IOU)

Independent Power Producer (IPP)

% of Cumulative Installed Capacity

Other:

155 MW (2%)

IPP: 4,965 MW

(73%)

IOU:

1,492 MW

(22%)

POU:

204 MW (3%)

2011 Capacity by

Owner Type

2011 Wind Technologies Market Report

(17%) or buy (50%) power from 66% of all wind power capacity installed in the United States

(with the 66% split between 46% IOU and 20% POU), a slight increase over the past two years.

Source: Berkeley Lab estimates based on AWEA project database

Figure 18. Cumulative and 2011 Wind Power Capacity Categorized by Power Off-Take

Arrangement

The role of power marketers – defined here as corporate intermediaries that purchase power

under contract and then re-sell that power to others, sometimes taking some merchant risk

– in

the wind power market has waned somewhat in recent years. In 2011, power marketers

purchased the output of just 2% of the new wind power capacity, with 10% of the cumulative

wind power capacity being sold to these entities.

Merchant/quasi-merchant projects were less prevalent in 2011 than they have been in recent

years, accounting for 21% of all new capacity (compared to 23% in 2010 and 36%-38% in 2009

and 2008) and 24% of cumulative capacity. Merchant/quasi-merchant projects are those whose

electricity sales revenue is tied to short-term contracted and/or wholesale spot electricity market

prices (with the resulting price risk commonly hedged over a 5- to 10-year period

) rather than

being locked in through a long-term PPA. With PPAs in relatively short supply compared to

wind developer interest, wholesale power prices at low levels, and a scheduled PTC expiration

looming, it is likely that many of the merchant/quasi-merchant projects built in 2011 are

merchant by necessity rather than by desire. In other words, in the absence of a PPA, building a

Power marketers are defined here to include not only traditional marketers such as PPM Energy (now part of

Iberdrola), but also the wholesale power marketing affiliates of large investor-owned utilities (e.g., PPL Energy Plus

or FirstEnergy Solutions), which may buy wind power on behalf of their load-serving affiliates. Direct sales to end

users (e.g., the University of Maryland buys wind power from both the Pinnacle project in West Virginia and the

Roth Rock project in Maryland) are also included in this category, because in these few limited cases the end-user is

effectively acting as a power marketer.

Hedges are often structured as a “fixed-for-floating” power price swap – a purely financial arrangement whereby

the wind power project swaps the “floating” revenue stream that it earns from spot power sales for a “fixed” revenue

stream based on an agreed-upon strike price. For some projects (especially where natural gas is virtually always the

marginal supply unit), the hedge is structured in the natural gas market rather than the power market, in order to take

advantage of the greater liquidity and longer terms available in the forward gas market.

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On-Site

Merchant/Quasi-Merchant

Power Marketer

POU

IOU

% of Cumulative Installed Capacity

Merchant:

1,434 MW

(21%)

IOU:

4,302 MW

(63%)

POU:

899 MW

(13%)

2011 Capacity by

Off-Take Category

Marketer:

147 MW (2%)

On-Site:

35 MW (0.5%)

2011 Wind Technologies Market Report

project on a merchant basis may, in some cases, simply have been the most expedient way to

ensure the deployment of committed turbines (perhaps ordered several years ago under

framework agreements) in advance of the scheduled expiration of important federal incentives

like the Section 1603 Treasury cash grant and the PTC. Given relatively low wholesale power

prices, and despite improvements in the cost, performance, and price of wind energy, some of

these projects are likely still seeking long-term PPAs, and may therefore not remain merchant for

long.

Finally, roughly 35 MW of the wind power additions in 2011 that used turbines over 100 kW in

size were interconnected on the customer side of the utility meter, with the power being

consumed on site rather than sold.

2011 Wind Technologies Market Report

4. Cost Trends

This section presents empirical data on both the upfront and operating costs of wind projects in

the United States. It begins with a review of wind turbine prices, followed by total installed

project costs, and then finally operation and maintenance (O&M) costs. Later sections present

data on wind project performance, and then the price at which wind energy is being sold.

With Increased Competition among Manufacturers, Wind Turbine Prices

Continued to Decline in 2011

Wind turbine prices have dropped substantially in recent years, despite continued technological

advancements that have yielded increases in hub heights and especially rotor diameters.

Berkeley Lab has gathered price data for 96 U.S. wind turbine transactions totaling 26,600 MW

announced from 1997 through 2011, including 12 transactions summing to 2,630 MW

announced in 2011. Sources of turbine price data vary, but many derive from press releases and

news reports. Wind turbine transactions differ in the services included (e.g., whether towers and

installation are provided, the length of the service agreement, etc.), turbine characteristics (and

therefore performance), and on the timing of future turbine delivery, driving some of the

observed intra-year variability in transaction prices. Nonetheless, most of the transactions

included in the Berkeley Lab dataset likely include turbines, towers, delivery, and limited

warranty and service agreements.

Unfortunately, collecting data on wind turbine transaction

prices is a challenge – e.g., the sample of turbine transactions announced in 2011 for which price

data were identified represents just 30% of the 8,750 MW of new turbine orders reported by

AWEA (2012a). In part as a result, Figure 19 – which depicts these wind turbine transaction

prices – also presents a range of 2012 wind turbine price quotes, as reported by Bloomberg NEF

(2012a).

After hitting a low of roughly $700/kW from 2000 to 2002, average wind turbine prices

increased by approximately $800/kW (>100%) through 2008, rising to an average of more than

$1,500/kW. The increase in turbine prices over this period was caused by several factors,

including: a decline in the value of the U.S. dollar relative to the Euro; increased materials,

energy and labor input prices; a general increase in turbine manufacturer profitability due in part

to strong demand growth and turbine and component supply shortages; increased costs for

turbine warranty provisions; and an up-scaling of turbine size, including hub height and rotor

diameter (Bolinger and Wiser 2011).

Because of data limitations, the precise content of many of the individual transactions is not known.

2011 Wind Technologies Market Report

Source: Berkeley Lab

Figure 19. Reported U.S. Wind Turbine Transaction Prices over Time

Since 2008, wind turbine prices have declined substantially, reflecting a reversal of some of the

previously mentioned underlying trends that had earlier pushed prices higher, as well as

increased competition among manufacturers and a shift to a buyer’s market (Bloomberg NEF

2012b). As shown in Figure 19, a number of turbine transactions announced in 2011 had pricing

in the $1,150-$1,350/kW range, while typical turbine prices in the U.S. in the first half of 2012

were reported by Bloomberg NEF (2012a) to be in the range of $900-$1,270/kW depending on

the technology. These figures suggest price declines of as much as 33% or more since late 2008,

with an average decline closer to perhaps 20% for orders announced in 2011. Moreover, these

declines have been coupled with: (1) improved turbine technology (e.g., witness the recent and

continued growth in average hub heights and rotor diameters shown earlier in Figure 16), and (2)

more-favorable terms for turbine purchasers (e.g., reduced turbine delivery lead times and less

need for large frame-agreement orders, longer initial operations and maintenance (O&M)

contract durations, improved warranty terms, and more-stringent performance guarantees).

These price reductions and improved terms would be expected, over time, to exert downward

pressure on total project costs and wind power prices, whereas increased rotor diameters and hub

heights would be expected to improve capacity factors and further reduce wind power prices.

Though Slow to Reflect Declining Wind Turbine Prices, Reported Installed

Project Costs Finally Turned the Corner in 2011

Berkeley Lab compiles data on the installed cost of wind power projects in the United States,

including data on 90 projects completed in 2011 totaling 6,402 MW, or 94% of the wind power

capacity installed in that year. In aggregate, the dataset (through 2011) includes 564 completed

wind power projects in the continental United States totaling 40,022 MW, and equaling roughly

85% of all wind power capacity installed in the United States at the end of 2011. Also reported

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Announcement Date

Orders <5 MW

Orders from 5 - 100 MW

Orders >100 MW

Turbine Transaction Price (2011$/kW)

Recent

reported

turbine

price

quotes

2011 Wind Technologies Market Report

here are data on a small sample of projects already installed or soon to be installed in 2012 (20

projects totaling 2,592 MW). In general, reported project costs reflect turbine purchase and

installation, balance of plant, and any substation and/or interconnection expenses. Data sources

are diverse, however, and are not all of equal credibility, so emphasis should be placed on overall

trends in the data, rather than on individual project-level estimates.

As shown in Figure 20, the average installed costs of wind power projects declined dramatically

from the beginning of the U.S. wind industry in California in the 1980s through the early 2000s,

before following turbine prices higher through the latter part of the last decade. Whereas turbine

prices peaked in 2008/2009, however, installed costs only started to turn the corner in 2011,

suggesting 2009/2010 as a likely peak. That average installed project costs would lag average

turbine prices is not surprising, and reflects the normal passage of time between when a turbine

supply agreement is signed (the time stamp for Figure 19) and when those turbines are actually

installed and commissioned (the time stamp for Figure 20).

Note: 2012 data represent preliminary cost estimates for a sample of 20 projects totaling 2.6 GW that have either already been or

will be built in 2012, and for which substantive cost estimates were available.

Source: Berkeley Lab (some data points suppressed to protect confidentiality)

Figure 20. Installed Wind Power Project Costs over Time (including preliminary sample

of 2012 project costs)

In 2011, the capacity-weighted average installed project cost stood at nearly $2,100/kW, down

almost $100/kW from the reported average cost in both 2009 and 2010. Moreover, a preliminary

estimate of the average installed cost among a relatively small sample of 20 projects totaling 2.6

On the other hand, since 2009, Figure 20 partly reflects installed cost estimates derived from publicly available

data from the Section 1603 cash grant program. In some cases (though exactly which is unknown), the Section 1603

grant data likely reflect the fair market value rather than the installed cost of wind power projects; in such cases the

installed cost estimates shown in Figure 20 will be artificially inflated.

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2012

Installed Project Cost (2011 $/kW)

Individual Project Cost (584 projects totaling 42,614 MW)

Capacity-Weighted Average Project Cost

2011 Wind Technologies Market Report

GW of capacity that either have been or will be built in 2012 suggests that average installed costs

may decline further in 2012, continuing to follow lower turbine prices.

Installed Costs Differ By Project Size, Turbine Size, and Region

Average installed wind power project costs exhibit weak economies of scale, at least at the low

end of the project size range. Figure 21 shows that – among the sample of projects installed

from 2009 through 2011 – there is a steady drop in per-kW average installed costs when moving

from projects of 5 MW or less to projects in the 20-50 MW range. As project size increases

beyond 50 MW, however, these data do not show strong evidence of continued economies of

scale.

Source: Berkeley Lab

Figure 21. Installed Wind Power Project Costs by Project Size: 2009-2011 Projects

Another way to look for economies of scale is by turbine size (rather than by project size), on the

theory that a given amount of wind power capacity may be built less expensively using fewer

larger turbines as opposed to a larger number of smaller turbines. Figure 22 explores this

relationship, breaking down turbine size into 0.75 MW bins. Here too some economies of scale

are evident as turbine size increases, at least at the lower end of the turbine size range.

Learning curves have been used extensively to understand past cost trends and to forecast future cost reductions

for a variety of energy technologies, including wind energy. Learning curves start with the premise that increases in

the cumulative production or installation of a given technology leads to a reduction in its costs. The principal

parameter calculated by learning curve studies is the learning rate: for every doubling of cumulative

production/installation, the learning rate specifies the associated percentage reduction in costs. Based on the

installed cost data presented in Figure 20 and global cumulative wind power installations, learning rates can be

calculated as follows: 7.5% (using data from 1982 through 2011) or 14.4% (using data only during the period of

cost reduction, 1982-2004).

It should be noted that there is likely some correlation between turbine size and project size, at least at the low end

of the range of each. In other words, projects of 5 MW or less are more likely than larger projects to use individual

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≤5 MW 5-20 MW 20-50 MW 50-100 MW 100-200 MW >200 MW

100 MW 430 MW 1,404 MW 4,372 MW 9,605 MW 5,284 MW

52 projects 34 projects 39 projects 56 projects 72 projects 22 projects

Installed Project Cost (2011 $/kW)

Capacity-Weighted Average Project Cost

Individual Project Cost

Sample includes projects built from 2009-2011

2011 Wind Technologies Market Report

Source: Berkeley Lab

Figure 22. Installed Wind Power Project Costs by Turbine Size: 2009-2011 Projects

Regional differences in average project costs are also apparent, and may occur due to variations

in development costs, transportation costs, siting and permitting requirements and timeframes,

and other balance-of-plant and construction expenditures. Considering only projects in the

sample that were installed from 2009 through 2011, Figure 23 shows that the capacity-weighted

average cost equaled $2,160/kW nationwide over this period. Texas was the lowest-cost region,

while California and New England were the highest-cost regions; all other regions came in close

to the nationwide average (see Figure 30, later, for regional definitions).

turbines of less than 1 MW. As such, Figures 21 and 22 – both of which show scale economies at small project or

turbine sizes, but diminishing as project or turbine size increases – could both be reflecting the same influence,

making it difficult to tease out the unique influences of turbine size from project size.

Permitting and regulatory compliance costs presumably play a role at both ends of the spectrum: Texas is reputed

to be one of the easiest locations in which to develop and build a wind power project, while California and New

England are two of the hardest. Graphical presentation of the data in this way, however, should be viewed with

some caution, as numerous other factors also influence project costs, and those are not controlled for in Figure 23.

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>0.1 & <1 MW ≥1 & <1.75 MW ≥1.75 & <2.5 MW ≥2.5 & <3.25 MW

20 MW 9,448 MW 9,637 MW 2,090 MW

15 projects 142 projects 92 projects 26 projects

Installed Project Cost (2011 $/kW)

Capacity-Weighted Average Project Cost

Individual Project Cost

Sample includes projects built from 2009-2011

2011 Wind Technologies Market Report

Source: Berkeley Lab

Figure 23. Installed Wind Power Project Costs by Region: 2009-2011 Projects

Newer Projects Appear to Show Improvements in Operations and

Maintenance Costs

Operations and maintenance (O&M) costs are a significant component of the overall cost of

wind energy, but can vary substantially among projects, and market data on actual project-level

O&M costs are not readily available. Even where data are available, care must be taken in

extrapolating historical O&M costs given the dramatic changes in wind turbine technology that

have occurred over the last two decades, not least of which has been the up-scaling of turbine

size (see Figures 15 and 16, earlier). Anecdotal evidence suggests that O&M costs and

premature component failures continue to be key challenges for the wind power industry.

Berkeley Lab has compiled O&M cost data for 133 installed wind power projects in the United

States, totaling 7,965 MW of capacity, with commercial operation dates of 1982 through 2010.

These data cover facilities owned by both independent power producers and utilities, though data

since 2004 are exclusively from utility-owned projects. A full time series of O&M cost data, by

year, is available for only a small number of projects; in all other cases, O&M cost data are

available for just a subset of years of project operations. Although the data sources do not all

clearly define what items are included in O&M costs, in most cases the reported values include

the costs of wages and materials associated with operating and maintaining the facility, as well as

rent.

Other ongoing expenses, including general and administrative expenses, taxes, property

insurance, depreciation, and workers’ compensation insurance, are generally not included. As

such, the following figures are not representative of total operating expenses for wind power

projects; the final paragraph in this section cites data from the financial reports of two public

The vast majority of the recent data derive from FERC Form 1, which uses Uniform System of Accounts

definitions.

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Texas Heartland Great Lakes Mountain Northwest East California New England

30 projects 81 projects 34 projects 20 projects 48 projects 20 projects 19 projects 23 projects

3,256 MW 5,902 MW 3,328 MW 2,091 MW 3,308 MW 1,383 MW 1,502 MW 423 MW

Installed Project Cost (2011 $/kW)

Capacity-Weighted Average Project Cost

Individual Project Cost

Capacity-Weighted Average Cost, Total U.S.

Sample includes projects built from 2009-2011

2011 Wind Technologies Market Report

companies with U.S wind assets suggesting higher total operating expenses. Given the scarcity,

limited content, and varying quality of the data, the results that follow therefore may not fully

depict the industry’s challenges with O&M issues and expenditures; instead, these results should

only be taken as illustrative of overall trends. Note finally that the available data are presented in

$/MWh terms, as if O&M represents a variable cost; in fact, O&M costs are in part variable and

in part fixed.

Although not presented here, expressing O&M costs in units of $/kW-year yields

qualitatively similar results to those presented in this section.

Figure 24 shows project-level O&M costs according to the commercial operation date.

Here,

each project’s O&M costs are depicted in terms of its average annual O&M costs from 2000

through 2011, based on however many years of data are available for that time period. For

example, for projects that reached commercial operations in 2010, only year 2011 data are

available, and that is what is shown in the figure.

Many other projects only have data for a

subset of years during the 2000-11 timeframe, either because they were installed after 2000 or

because a full time series is not available, so each data point in the chart may represent a

different averaging period over 2000-11. The chart highlights the 47 projects, totaling 4,339

MW, for which 2011 O&M cost data were available; those projects have either been updated or

added to the chart since the previous edition of this report.

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

Commercial Operation Date

Projects with no 2011 O&M data

Projects with 2011 O&M data

Polynomial Trend Line (all projects)

Average Annual O&M Cost 2000-2011

(2011 $/MWh)

Source: Berkeley Lab; seven data points suppressed to protect confidentiality

Figure 24. Average O&M Costs for Available Data Years from 2000-2011, by Commercial

Operation Date

The data exhibit considerable spread, demonstrating that O&M costs are far from uniform across

projects. However, Figure 24 suggests that projects installed more recently have, on average,

incurred lower O&M costs. Specifically, capacity-weighted average 2000-11 O&M costs for the

For projects installed in multiple phases, the commercial operation date of the largest phase is used; for re-

powered projects, the date at which re-powering was completed is used.

Projects installed in 2011 are not shown because only data from the first full year of project operations (and

afterwards) are used, which in the case of projects installed in 2011 would be year 2012 (for which data are not yet

available).

2011 Wind Technologies Market Report

24 projects in the sample constructed in the 1980s equal $33/MWh, dropping to $23/MWh for

the 37 projects installed in the 1990s, and to $10/MWh for the 69 projects installed since 2000.

This drop in O&M costs may be due to a combination of at least two factors: (1) O&M costs

generally increase as turbines age, component failures become more common, and manufacturer

warranties expire

; and (2) projects installed more recently, with larger turbines and more

sophisticated designs, may experience lower overall O&M costs on a per-MWh basis.

Limitations in the underlying data, however, do not permit the influence of these two factors to

be unambiguously distinguished.

To help illustrate the possible influence of these two factors, however, Figure 25 shows median

annual O&M costs over time, based on project age (i.e., the number of years since the

commercial operation date), and segmented into two project-vintage groupings. Data for

projects under 5 MW in size are excluded, to help control for the confounding influence of

economies of scale. Note that, at each project age increment and for each of the two project

vintage groups, the number of projects used to compute median annual O&M costs is limited and

varies substantially (from 3 to 31 data points per project-year for projects installed from 1998

through 2004 and from 2 to 36 data points per project-year for projects installed from 2005

through 2010). With this limitation in mind, the figure shows that projects installed more

recently (2005-2010) have had, in general, lower O&M costs than those installed in earlier years

(1998-2004), at least for the first six years of operation. In addition, projects show an upward

trend in project-level O&M costs as they age, though the sample size after year four is limited.

Project Age (Number of Years Since Commercial Operation Date)

1998-2004

2005-2010

Commercial Operation Date:

n=18

Median Annual O&M Cost

(2011 $/MWh)

n=36

n=20

n=8

n=5

n=3

n=31

n=34

n=23

n=25

n=11

n=6

n=3

n=2

Source: Berkeley Lab; medians shown only for groups of two or more projects, and only projects >5 MW are included

Figure 25. Median Annual O&M Costs by Project Age and Commercial Operation Date

If expressed instead in terms of $/kW-yr, capacity-weighted average 2000-2011 O&M costs were $65/kW-yr for

projects in the sample constructed in the 1980s, dropping to $54/kW-yr for projects constructed in the 1990s, and to

$28/kW-yr for projects constructed since 2000. Somewhat consistent with these observed O&M costs, Bloomberg

New Energy Finance (2011) reports the cost of 5-year full-service O&M contracts at $30-$48/kW-yr.

Many of the projects installed more-recently may still be within their turbine manufacturer warranty period.

2011 Wind Technologies Market Report

As indicated previously, the data presented in Figures 24 and 25 are derived from a variety of

sources, and in most cases include only a subset of total operating expenses. In comparison, the

financial statements of public companies with sizable U.S. wind project assets indicate markedly

higher total operating costs. Specifically, two companies – Infigen and EDP Renováveis

(EDPR), which together represent approximately 4,511 MW of installed capacity, nearly all of

which has been installed since 2000 – report total operating expenses of $21.5/MWh and

$22.1/MWh, respectively, for their U.S. wind project portfolios in 2011 (EDPR 2012; Infigen

2011, 2012). These operating expenses are more than twice the $10/MWh reported above, for

the 69 projects in the Berkeley Lab data sample installed since 2000. These differences are

likely due, in large measure, to the scope of expenses included, as the company financial reports

include items such as general and administrative expenses, local taxes, property insurance, and

workers’ compensation insurance, which are generally not included within the data comprising

the Berkeley Lab sample.

2011 Wind Technologies Market Report

5. Performance Trends

This section presents data from a Berkeley Lab compilation of project-level capacity factors.

The full data sample consists of 397 wind power projects built between 1983 and 2010, and

totaling 37,606 MW (94% of nationwide installed wind power capacity at the end of 2010).

The followed discussion of performance trends is broken up into three sub-sections: the first

analyzes trends in sample-wide capacity factor over time; the second looks at variations in

capacity factor by project vintage; and the third focuses on regional variations in capacity factor.

Sample-Wide Wind Project Capacity Factors Have Generally Improved Over

Time

Focusing on a progressively larger cumulative sample of projects in each calendar year,

the

blue bars in Figure 26 demonstrate that average sample-wide wind power project capacity factors

have, in general, gradually increased over time, from 25% in 1999 (for projects installed through

1998) to a high of nearly 34% in 2008 (for projects installed through 2007). In 2009 and 2010,

however, sample-wide capacity factors dropped to around 30%, before 2011 brought a

resurgence back to 33% (for projects installed through 2010).

Source: Berkeley Lab

Figure 26. Average Cumulative Sample-Wide Capacity Factor by Calendar Year

Though some performance data for wind power projects installed in 2011 are available, those data do not span an

entire year of operations. As such, for the purpose of this section, the focus is on projects with commercial

operation dates in 2010 and earlier.

There are fewer individual projects – though more capacity – in the cumulative sample for 2011 than there are for

2010. This is due to the sampling method used by the EIA, which focuses on a subset of larger projects throughout

the year, before eventually capturing the entire sample some months after the year has ended. As a result, it might

be late 2012 before the EIA reports 2011 performance data for all of the wind power projects that it tracks, and in

the mean time, this report is left with a smaller sample consisting mostly of the larger projects in each state.

10%

15%

20%

25%

30%

35%

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

5 12 41 84 97 119 143 168 210 254 354 466 397

544 1,000 1,531 3,271 3,811 5,211 5,880 8,712 10,695 15,670 24,368 34,213 37,606

Capacity Factor

Based on Estimated Generation (if no curtailment in subset of regions)

Based on Actual Generation (with curtailment)

4-Year Moving Average (based on estimated generation)

Year:

Projects:

MW:

2011 Wind Technologies Market Report

The relatively steady improvement in average sample-wide capacity factors through 2008 can be

attributed largely to the substantial increase in average hub height and rotor diameter

(particularly in relation to rated capacity) shown earlier in Figure 16. The drop in 2009 and

2010, however, followed by a rebound in 2011, warrants further investigation. At least two

factors likely played a role in this more recent volatility in average project performance: annual

wind resource variation and wind power curtailment.

Annual Wind Resource Variation: The strength of the wind resource varies from year to year,

in part in response to significant persistent weather patterns such as El Niño/La Niña. In 2011,

the U.S. reportedly enjoyed above-average wind speeds throughout much of the nation, and in

particular across much of the country’s interior – where most installed wind power capacity

resides (AWS Truepower 2012, 3TIER 2012). An above-normal 2011 follows what were

considered to be lackluster wind years in 2010 and 2009, preceded by a strong wind year in

2008. This same pattern is evident in the average sample-wide capacity factors shown in Figure

26, highlighting the influence of natural yearly variations in average wind resource conditions on

sample-wide average wind power capacity factors.

Wind Power Curtailment: Curtailment of wind project output due to transmission inadequacy

and/or minimum generation limits (and, as a consequence, low or negative wholesale electricity

prices) has become common, principally in Texas, but also to a lesser degree in other markets.

For example, Table 5 (which focuses on forced, rather than economic, curtailment) shows that

8.5% of potential wind energy generation within ERCOT was curtailed in 2011 – up slightly

from 7.7% in 2010, but down sharply from 17% in 2009.

Outside of Texas, forced curtailment

increased significantly on the Bonneville Power Administration’s (BPA) system in 2011, due to

unusually heavy spring runoff that resulted in above-normal hydropower generation.

aggregate, assuming a 33% average capacity factor, the total amount of wind generation

curtailed in 2011 within just the six utility/ISO/RTO service territories shown in Table 5 equates

to the annual output of roughly 1,220 MW of wind power capacity.

Looked at another way, wind power curtailment has reduced sample-wide average capacity

factors in recent years, and particularly in 2009. While the blue bars in Figure 26 reflect actual

capacity factors – i.e., including the negative impact of curtailment events – the orange bars add

back in the estimated amount of wind generation that has been forced to curtail in recent years

within the six territories shown in Table 5, to estimate what the sample-wide capacity factors

would have been absent this forced curtailment. As shown, sample-wide capacity factors would

have been on the order of 1-2 percentage points higher nationwide from 2008 through 2011

absent curtailment in just this subset of regions. Estimated capacity factors would have been

even higher if comprehensive forced and economic curtailment data were available for all

regions.

The significant reduction in ERCOT curtailment since 2009 is, in part, attributable to a private 229-mile

transmission line built by NextEra Energy in late 2009 to move power from its 735.5 MW Horse Hollow project out

of the congested West zone and into the uncongested South zone. As a result, Horse Hollow’s capacity factor

increased from just 20% in 2009 to 29% in both 2010 and 2011. Several transmission line upgrades related to the

Texas competitive renewable energy zone (CREZ) effort have also helped reduce curtailment in ERCOT (see later

section on transmission).

BPA again curtailed some wind generation for similar reasons in the spring of 2012, but the magnitude and

duration was nowhere near that seen in 2011.

2011 Wind Technologies Market Report

Table 5. Estimated Wind Curtailment in Various Areas, in GWh

(and as a % of potential wind generation)

2007

2008

2009

2010

2011

Electric Reliability Council of Texas

(ERCOT)

109

(1.2%)

1,417

(8.4%)

3,872

(17.1%)

2,067

(7.7%)

2,622

(8.5%)

Southwestern Public Service Company

(SPS)

N/A

(0.0%)

0.9

(0.0%)

0.5

(0.0%)

Public Service Company of Colorado

(PSCo)

N/A

2.5

(0.1%)

19.0

(0.6%)

81.5

(2.2%)

63.9

(1.4%)

Northern States Power Company

(NSP)

N/A

25.4

(0.8%)

42.4

(1.2%)

42.6

(1.2%)

54.4

(1.2%)

Midwest Independent System Operator

(MISO), less NSP

N/A N/A

250

(2.2%)

781

(4.4%)

657

(3.0%)

Bonneville Power Administration

(BPA)

N/A N/A N/A

4.6*

(0.1%)

128.7*

(1.4%)

Total Across These Six Areas:

109

(1.2%)

1,445

(5.6%)

4,183

(9.6%)

2,978

(4.8%)

3,526

(4.8%)

*A portion of BPA’s curtailment is estimated assuming that each curtailment event lasts for half of the maximum possible hour

for each event.

Source: ERCOT, Xcel Energy, MISO, BPA

Some Stagnation in Wind Project Capacity Factor Improvement Is Evident

Among Projects Built from 2006 through 2010, Due in Part to a Build Out of

Projects in Progressively Weaker Wind Resource Areas

One way to control for the time-varying influences described in the previous section (e.g., annual

wind resource variations and a particularly bad curtailment year in 2009) is to focus exclusively

on capacity factors in 2011.

As such, whereas Figure 26 presents capacity factors in each

calendar year, Figure 27 instead shows only capacity factors in 2011, broken out by project

vintage. In general, Figure 27 indicates that projects built more recently generated higher

capacity factors in 2011 – this is particularly true among those projects built up through 2005.

Average 2011 capacity factors for projects built from 2006 through 2010, however, were largely

stagnant, ranging from 33%-35% on a weighted-average basis (on the other hand, the maximum

capacity factor attained by any individual project in 2011 increased noticeably among those

projects built in 2009 and 2010).

Although focusing just on 2011 does control (at least loosely) for some of these known time-varying impacts, it

also means that the absolute capacity factors shown in Figure 27 may not be representative over longer terms if 2011

was not a representative year in terms of the strength of the wind resource or wind power curtailment. As noted

earlier, 2011 was generally an above-average wind year in much of the U.S., suggesting that the capacity factors

shown in Figure 27 may be biased upwards to some degree due to this factor.

2011 Wind Technologies Market Report

Source: Berkeley Lab

Figure 27. 2011 Project Capacity Factors by Commercial Operation Date

This pattern of improving performance by project vintage through 2005 followed by relative

stagnation for projects built from 2006-2010 is broadly consistent with trends over this same

period in both average hub height (shown earlier in Figure 16) and average swept rotor area

relative to turbine nameplate capacity – i.e., the inverse of “specific power” (shown below in

Figure 28).

Specifically, scaling in both hub height and the inverse of “specific power” was

most pronounced among turbines installed from 1998 through 2006, which roughly coincides

with the vintages that show the largest increases in 2011 capacity factor in Figure 27. Since

2006, however, average hub height has increased by only a few meters (see Figure 16), which in

part explains the stagnation in average capacity factors among more recently built wind power

projects. Swept area relative to rated capacity also held steady from 2006 through 2009, before

increasing again in 2010 and 2011 – this recent increase is perhaps reflected in the higher

maximum capacity factors achieved by 2010 vintage projects in Figure 27. The fact that rotor

scaling (relative to nameplate capacity) continued for projects built in 2011 (and now 2012)

suggests that further increases in capacity factors are likely in the coming years, all else equal.

A wind turbine’s “specific power” is a measure of its rated capacity relative to its swept rotor area (W/m

). As

rotor diameter (and therefore swept area) increases relative to nameplate capacity – e.g., as with low wind speed

turbine designs – more of the wind’s energy is captured, resulting in greater utilization of the generator’s rated

capacity, and therefore a higher overall capacity factor. Thus, all else equal, as specific power declines, capacity

factor should increase. Figure 28 plots the inverse of specific power (m

/kW) in order to better portray its influence

on capacity factor.

10%

20%

30%

40%

50%

60%

Pre-1998 1998-99 2000-01 2002-03 2004-05 2006 2007 2008 2009 2010

5 projects 24 projects 25 projects 38 projects 29 projects 22 projects 36 projects 72 projects 96 projects 50 projects

475 MW 777 MW 1,617 MW 2,061 MW 3,578 MW 1,755 MW 5,071 MW 8,008 MW 9,276 MW 4,989 MW

Capacity-Weighted Average (by project vintage)

Individual Project (by project vintage)

2011 Capacity Factor (by project vintage)

Sample includes 397 projects totaling 37.6 GW

2011 Wind Technologies Market Report

Figure 28. Index of Wind Resource Quality at 80 Meters vs. Inverse of Specific Power

Though trends in hub height and “specific power” explain a portion of the results presented in

Figure 27, another large influence relates to the quality of the wind resource in which projects

are located. In particular, as depicted in Figure 28, the average estimated quality of the wind

resource at 80 meters among those projects built in each period has declined over time, and that

decline is particularly sizable since 2008.

Specifically, wind power projects built in 2008 were,

on average, located in estimated 80-meter wind resource conditions that are 4.7% worse than

those projects build in 1998-99. Projects built in 2011, meanwhile, were – on average – located

in estimated 80-meter wind resource conditions that are 16.1% worse than those projects built in

1998-99. Moreover, the sharp decline in average estimated wind resource quality at 80 meters

for projects built since 2008 has not – unlike in earlier periods – been offset by significant

growth in average hub heights (though swept area relative to rated capacity has increased over

this period). This decline in the average estimated wind resource quality of recently built wind

power projects is therefore also a key contributor to the recent stagnation in average capacity

factors and, without this decline, project-level average capacity factors would likely have

continued their improvement from 2006 through 2010.

This apparent trend of building wind power projects in lower quality wind resource areas in

recent years may come as a surprise, given that the United States still has an abundance of

undeveloped high-quality wind resource areas. Several different factors could be driving this

trend:

• Technology Change: The increased availability of low-wind speed turbines that feature

higher hub heights and a lower “specific power” (i.e., a larger rotor diameter relative to rated

capacity) may have enabled the economical build out of lower wind speed sites.

The procedures used for estimating the quality of the wind resource in which wind projects are located, over time,

is described in the Appendix.

100

1998-99 2000-01 2002-03 2004-05 2006 2007 2008 2009 2010 2011

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

Average 80m Wind Resource Quality Among Built Projects (left scale)

Swept Area divided by Nameplate Capacity (right scale)

Index of Wind Resource Quality at 80m (1998-99=100)

Inverse of Specific Power (m^2 / kW)

2011 Wind Technologies Market Report

• Siting Impacts: Developers may have reacted to increasing transmission constraints (or

other siting constraints, or even just regionally differentiated wholesale electricity prices) by

focusing on those projects in their pipeline that may not be located in the best wind resource

areas, but that do have access to transmission (or higher-priced markets, or readily available

sites without long permitting times).

• Policy Influence: Projects built in the four-year period from 2009 through 2012 have been

able to access a 30% ITC or cash grant in lieu of the PTC. Because the dollar amount of the

ITC or grant is not dependent on how much electricity a project generates, it is possible that

developers have seized this limited opportunity to build out the less-energetic sites in their

development pipelines. Additionally, state RPS requirements sometimes require or motivate

in-state or in-region wind development in lower wind resource regimes.

Regional Variations in Capacity Factor Reflect the Strength of the Wind

Resource

The project-level spread in capacity factors shown earlier in Figure 27 is enormous, with 2011

capacity factors ranging from 18% to 53% among just those projects built in 2010. Some of this

spread is attributable to regional variations in average wind resource quality.

Source: Berkeley Lab

Figure 29. 2011 Project Capacity Factors by Region: 2004-2010 Projects Only

Figure 29 shows the regional variation in 2011 capacity factors (using the regional definitions

shown in Figure 30), based on a sub-sample of wind power projects built from 2004 through

2010 (i.e., a period of relative stability in 2011 capacity factors, per Figure 27). For this sample

of projects, capacity-weighted average capacity factors are the highest in the Heartland (37%)

and Mountain (36%) regions, and lowest in the East (25%) and New England (28%) regions.

10%

20%

30%

40%

50%

60%

East New England California Great Lakes Northwest Texas Mountain Heartland

26 projects 10 projects 14 projects 29 projects 51 projects 48 projects 29 projects 98 projects

2,282 MW 291 MW 1,127 MW 3,898 MW 4,445 MW 8,256 MW 3,026 MW 9,468 MW

Capacity-Weighted Average (by region)

Individual Project (by region)

Capacity-Weighted Average (total U.S.)

2011 Capacity Factor

Sample includes 305 projects built from 2004-2010 and totaling 32.8 GW

2011 Wind Technologies Market Report

Not surprisingly, these regional rankings are roughly consistent with relative average wind speed

within each region, as shown in Figure 30.

Source: AWS Truepower, NREL

Figure 30. Average Wind Speed at 80 Meters (with regional boundaries)

Given the relatively small sample size in some regions, as well as the possibility that certain regions may have

experienced a particularly good or bad wind resource year or different levels of wind energy curtailment in 2011,

care should be taken in extrapolating these results. For example, the average 2011 capacity factor in Texas of 34.4%

was depressed by the forced curtailment of wind generation, and would have been closer to 38% – an absolute

increase of 3.3% – had there been no curtailment.

Average wind speed at 80 meters

Northwest

Mountain

Texas

Heartland

Great

Lakes

California

Southeast

East

New

England

Average wind speed at 80 meters

Northwest

Mountain

Texas

Heartland

Great

Lakes

California

Southeast

East

New

England

2011 Wind Technologies Market Report

6. Wind Power Price Trends

Earlier sections documented trends in wind turbine prices, installed project costs, O&M costs,

and capacity factors – all of which are determinants of the wind power sales prices presented in

this section. In general, higher cost and/or lower capacity factor projects will require higher

wind power prices, while lower cost and/or higher capacity factor projects can get by with lower

wind power prices.

Berkeley Lab collects data on wind power sales prices from the sources listed in the Appendix,

resulting in a dataset that consists of historical price data for 271 wind power projects installed

between 1998 and the end of 2011. These projects total 20,189 MW, or 44% of the wind power

capacity brought on line in the United States over the 1998-2011 timeframe.

The dataset

excludes merchant plants and projects that sell renewable energy certificates (RECs) separately.

The prices in the dataset therefore reflect the bundled price of electricity and RECs as sold by a

project owner under a power purchase agreement (PPA). Because these prices are suppressed by

the receipt of available state and federal incentives (e.g., the prices reported here would be at

least $20/MWh higher without the PTC / ITC / Treasury Grant), and are also influenced by

various local policies and market characteristics, they do not represent wind energy generation

costs.

This section summarizes wind power sales prices in a number of different ways: by calendar

year, by project vintage, by PPA execution date, by region, and compared to wholesale power

prices both nationwide and regionally. In addition, REC prices are presented in a text box on

page 53.

Unlike Turbine Prices and Installed Project Costs, Cumulative, Sample-

Wide Wind Power Prices Continued to Move Higher in 2011

Figure 31 shows the cumulative capacity-weighted average wind power price (along with the

range of individual project prices falling between the 25

and 75

percentiles) in each calendar

year from 1999 through 2011. Based on the limited sample of 11 projects built in 1998 or 1999

and totaling 588 MW, the weighted-average price of wind energy in 1999 was roughly

$62/MWh (expressed in 2011 dollars). This weighted-average price progressively declined in

subsequent years until reaching a low of $37/MWh in 2005 (among a sample of 80 projects

totaling 4,056 MW). Since then, sample-wide average prices have risen steadily, such that in

2011, the cumulative sample of projects built from 1998 through 2011 had grown to 271 projects

totaling 20,189 MW, with an average price of $54/MWh (with 50% of individual project prices

Three primary factors significantly restrict the size of this sample: (1) projects located within ERCOT (in Texas)

fall outside of FERC’s jurisdiction, and are therefore not required to report prices (reduces sample by roughly 9,600

MW); (2) the increasing number of utility-owned projects are not included, since these projects do not sell their

power at an observable price (reduces sample by about 6,400 MW); and (3) the increasing number of merchant (or

quasi-merchant) projects that sell power and RECs separately are not included in the sample, because the power

price reported by these projects only represents a portion of total revenue received (reduces sample by roughly

another 6,000 MW). In addition, certain “qualifying facilities” are not required to report their power sales to FERC.

2011 Wind Technologies Market Report

falling between $36/MWh and $63/MWh).

This general temporal trend of falling and then

rising prices is consistent with the turbine price and installed project cost trends shown in earlier

sections, though the cumulative nature of Figure 31 results in a smoother, less-responsive curve

that lags the directional changes in turbine and project cost trends.

Source: Berkeley Lab

Figure 31. Cumulative Capacity-Weighted Average Wind Power Prices over Time

Binning Wind Power Sales Prices by Project Vintage Also Fails to Show a

Price Reversal

To better illustrate changes in the price of power from newly built wind power projects, Figure

32 shows average wind power sales prices in 2011, grouped by project vintage (i.e., by each

project’s initial commercial operation date, COD).

Although the limited project sample and

the considerable variability in prices across projects installed in a given time period complicate

analysis of national price trends (with averages subject to regional and other factors), the general

trend exhibited by the capacity-weighted-average prices (i.e., the blue columns) nevertheless

shows that prices bottomed out for projects built from 2002 through 2005, and have since risen

All wind power pricing data presented in this report exclude the few projects located in Hawaii. Those projects

are considered outliers in that they are significantly more expensive to build than projects in the continental United

States, and have received power sales prices that are significantly higher-than-normal, in part because those prices

have historically been linked to the price of oil.

For example, Figure 31 shows wind power sales prices bottoming in 2005 – i.e., several years after turbine prices

and installed project costs bottomed – and potentially not yet peaking in 2011, even though turbine prices peaked in

2008/2009 and installed costs peaked in 2009/2010.

Prices from two individual projects – one built during the 2000-2001 period, and the other built in 2008 – are not

shown in Figure 32 (due to the scale of the y-axis), but are included in the capacity-weighted averages for those

periods. The omitted prices are roughly $150/MWh and $126/MWh, respectively.

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

11 12 22 33 47 64 80 97 120 150 184 233 271

588 600 741 1,444 2,294 3,103 4,056 4,987 7,980 10,535 13,701 17,190 20,189

Cumulative Capacity-Weighted Average Wind Power Price (with 25% and 75% quartiles)

Wind Power Price (2011 $/MWh)

Year:

Projects:

MW:

Sample includes projects built from 1998-2011

2011 Wind Technologies Market Report

significantly.

Specifically, the capacity-weighted average 2011 sales price, based on projects

in the sample built in 2011, was roughly $74/MWh. This price is essentially unchanged from the

average among projects built in 2010 (the spread of individual project prices is also similar

among projects built in 2010 and 2011), and is more than twice the average of $32/MWh among

projects built during the low point in 2002 and 2003.

Source: Berkeley Lab database

Figure 32. 2011 Wind Power Prices by Project Commercial Operation Date

Although the similarity in pricing among 2010 and 2011 projects shown in Figure 32 may

actually portend a peak (with lower prices likely among 2012 projects), the fact that neither

Figure 31 nor (especially) Figure 32 show any sort of price reversal is nevertheless surprising,

particularly given the degree to which turbine prices have dropped since 2008, along with

growing anecdotal evidence of aggressive pricing in wind PPAs. The next section parses the

data in a different way, by PPA execution date, to try and understand these findings.

Although it may seem counterintuitive, the weighted-average price in 1999 for projects built in 1998 and 1999

(shown in Figure 31 to be about $62/MWh) is significantly higher than the weighted-average price in 2011 for

projects built in 1998 and 1999 (shown in Figure 32 to be about $34/MWh) for three reasons: (1) the sample size is

larger in Figure 32, due to the fact that 2011 prices are presented, rather than 1999 prices as in Figure 31 (i.e., early-

year pricing for some of the projects built in 1998-1999 were unavailable); (2) two of the larger projects built in

1998 and 1999 (for which both 1999 and 2011 prices are available, meaning that these projects are represented

within both figures) have nominal PPA prices that actually decline, rather than remaining flat or escalating, over

time; and (3) inflating all prices to constant 2011 dollar terms impacts older (i.e., 1999) prices more than it does

more-recent (i.e., 2011) prices.

100

120

1998-99 2000-01 2002-03 2004-05 2006 2007 2008 2009 2010 2011

14 projects 21 projects 33 projects 21 projects 14 projects 24 projects 31 projects 53 projects 27 projects 33 projects

650 MW 854 MW 1,648 MW 1,269 MW 742 MW 3,190 MW 2,669 MW 3,987 MW 2,386 MW 2,793 MW

Capacity-Weighted Average (by project vintage)

Individual Project (by project vintage)

2011 Wind Power Price (2011 $/MWh)

2011 Wind Technologies Market Report

Binning Wind Power Sales Prices by PPA Execution Date Shows Steeply

Falling Prices

Figure 33 shows essentially the very same data as Figure 32, but this time binned by PPA

execution date rather than commercial operation date.

Viewed this way, 2011 and 2010 wind

power prices tell a very different story – one of falling prices since 2009. The green individual

project markers in Figure 33 represent those wind power projects built in 2011, and demonstrate

that only two such projects (within our sample) actually signed PPAs in 2011. All other 2011

projects in our sample signed PPAs in 2010, 2009, or even back as far as 2008 – i.e., at the

height of the market for turbines – thereby locking in prices that ended up being above market in

2011. Overall, the weighted-average PPA execution date among all 2011 projects in our sample

was December 2009 – more than a full year before the start of 2011. This lag is considerable –

particularly in a fast-moving market – and is roughly a year longer than the average lag seen in

previous years (i.e., prior to 2011, the average PPA execution date for projects built in a given

year most often fell somewhere in the fourth quarter of the immediately preceding year).

Figure 33. 2011 Wind Power Prices by PPA Execution Date

Figure 34 also breaks out wind power pricing by PPA execution date, but this time among a

slightly smaller sample of projects for which we have full-term (rather than just historical) PPA

price data.

Having full-term price data (i.e., pricing data for the full duration of each PPA, not

just historical PPA prices) enables us to present these PPA prices on a levelized basis (levelized

over the full contract term), which provides a more complete picture of wind power pricing (e.g.,

by capturing any escalation over the duration of the contract). Consistent with Figure 33, Figure

34 shows a clear downward trend in wind power prices since 2009, particularly among those

The sample in Figure 33 is slightly smaller than in Figure 32 (19,727 MW vs. 20,189 MW, respectively) because

we were not able to ascertain PPA execution dates for all projects included in Figure 32.

Many of the recent levelized PPA prices shown in Figure 34 are from projects that will be built in 2012; these

projects do not show up in Figure 33, because they were not operational in 2011.

100

120

1998-99 2000-01 2002-03 2004-05 2006 2007 2008 2009 2010 2011

10 projects 13 projects 21 projects 24 projects 25 projects 12 projects 33 projects 41 projects 23 projects 2 projects

577 MW 939 MW 1,583 MW 2,402 MW 2,451 MW 1,638 MW 3,483 MW 4,320 MW 2,184 MW 150 MW

Capacity-Weighted Average (by PPA vintage)

Individual Projects (by PPA vintage)

Individual Projects Built in 2011 (by PPA vintage)

2011 Wind Power Price (2011 $/MWh)

2011 Wind Technologies Market Report

projects located within the mid-continent “wind belt.”

Prices are generally higher in the rest of

the U.S., where the wind resource is not as strong (the dashed “best fit” curve almost perfectly

divides the “wind belt” from the rest of the U.S.), and have been particularly high in California in

recent years.

Among the full sample of wind power projects with PPAs signed in 2011 depicted in Figure 34,

the capacity-weighted average levelized PPA price is $35/MWh, down from $59/MWh for PPAs

signed in 2010 and $72/MWh for PPAs signed in 2009. For just the “wind belt,” the

corresponding levelized PPA prices are $32/MWh, $44/MWh, and $53/MWh respectively.

Either way, it is apparent that wind pricing – when parsed by PPA execution date – has come

down significantly in recent years, and is currently more competitive than what is implied by

Figures 31 and 32, earlier. In fact, levelized PPA prices in the $30-$40/MWh range – currently

achievable (at least with the PTC) in many parts of the interior U.S. – are fully competitive with

the range of wholesale power prices seen in 2011, as shown later in Figure 36.

Note: Size of “bubble” is proportional to project nameplate capacity.

Figure 34. Levelized Wind PPA Prices by PPA Execution Date

The “wind belt” is defined here to consist of 13 states located within the interior U.S. where the wind resource is

generally the strongest (see Figure 30, earlier). Wind belt states include Colorado, Iowa, Kansas, Minnesota,

Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, and Wyoming.

Recent high prices in California may be due, in part, to aggressive renewable energy policies (along with certain

elements of policy design) that give developers a strong negotiating position. Relatively stringent permitting and

regulatory requirements may also make California a particularly expensive state in which to build wind power

projects, as suggested by the installed cost data presented earlier in this report.

$20

$40

$60

$80

$100

$120

Jan-96

Jan-97

Jan-98

Jan-99

Jan-00

Jan-01

Jan-02

Jan-03

Jan-04

Jan-05

Jan-06

Jan-07

Jan-08

Jan-09

Jan-10

Jan-11

Jan-12

PPA Execution Date

California (2,127 MW, 19 contracts)

Rest of US (4,033 MW, 66 contracts)

Wind Belt (10,882 MW, 131 contracts)

Levelized PPA Price (2011 $/MWh)

150 MW

2011 Wind Technologies Market Report

Wind Power PPA Prices Vary Widely By Region

As suggested by Figure 34, regional factors can influence wind power pricing. Regional

differences, for example, can affect not only project capacity factors (depending on the strength

of the wind resource in a given region), but also development and installation costs (depending

on a region’s physical geography, population density, labor rates, or even regulatory processes).

It is also possible that regions with higher wholesale electricity prices or with greater demand for

renewable energy will, in general, yield higher wind energy contract prices due to market factors.

Figure 35 shows individual project and average 2011 wind power prices by region for just those

wind power projects installed in 2010 and 2011 (which, at least per Figure 32, was a period of

stable pricing), with regions as defined earlier in Figure 30. Although sample size is quite small

and therefore problematic in several regions,

Texas, the Heartland, and the Mountain regions

appear to be among the lowest price areas, on average, while California is, by far, the highest

price region.

Source: Berkeley Lab

Figure 35. 2011 Wind Power Prices by Region: 2010-2011 Projects Only

Abnormally high pricing in California, coupled with an unusually high proportion of California

projects in the 2011 project sample, is another reason why Figure 32 fails to show a price

reversal. Specifically, California accounts for nearly one quarter of the 2011 project sample,

thereby disproportionately inflating the capacity-weighted average price among all 2011 projects

(as it also did in 2010, when it made up almost 20% of the 2010 project sample).

Average prices in Texas and New England, in particular, may not be representative as those averages include just

one and three projects, respectively. Once again, sample size in Texas is severely limited (despite the enormous

growth of wind power capacity in that state) because generators located within ERCOT are not required to file

pricing information with FERC. As such, the pricing information for Texas provided in this report comes primarily

from projects located in the Texas panhandle, which is within the SPP rather than ERCOT.

100

120

Texas Heartland Mountain New England Great Lakes East Northwest California

1 project 23 projects 6 projects 3 projects 5 projects 5 projects 7 projects 10 projects

78 MW 1,395 MW 868 MW 113 MW 600 MW 314 MW 724 MW 1,088 MW

Capacity-Weighted Average (by region)

Individual Project (by region)

Capacity-Weighted Average (total U.S.)

2011 Wind Power Price (2011 $/MWh)

Sample includes projects built in 2010 and 2011

2011 Wind Technologies Market Report

Low Wholesale Electricity Prices Continued to Challenge the Relative

Economics of Wind Power

Figure 36 shows the range (minimum and maximum) of average annual wholesale electricity

prices for a flat block of power

going back to 2003 at twenty-three different pricing nodes

located throughout the country (refer to the Appendix for the names and approximate locations

A flat block of power is defined as a constant amount of electricity generated and sold over a specified time

period. Though wind power projects do not provide a flat block of power, as a common point of comparison, a flat

block is not an unreasonable starting point. In other words, the time-variability of wind energy is often such that its

wholesale market value is somewhat lower than, but not too dissimilar from, that of a flat block of (non-firm) power.

REC Prices Rise in the Northeast, Remain Depressed Elsewhere

The wind power sales prices presented in this report reflect only the bundled sale of both electricity and RECs;

excluded are projects that sell RECs separately from electricity, thereby generating two sources of revenue. REC

markets are fragmented in the United States, but consist of two distinct segments: compliance markets in which

RECs are purchased to meet state RPS obligations, and green power markets in which RECs are purchased on a

voluntary basis.

The figures below present indicative monthly data of spot-market REC prices in both compliance and voluntary

markets, grouped into High-Price and Low-Price markets; data for compliance markets focus on the “Class I” or

“Main Tier” of the RPS policies. Clearly, spot REC prices have varied substantially, both across states and over

time within individual states, though prices across states within common regions (New England and PJM) are

linked to varying degrees. Over the course of 2011, REC spot-market prices rose substantially among

Northeastern markets, after having steadily declined over several preceding years, and ended the year above

$35/MWh in Connecticut, Massachusetts, New Hampshire, and Rhode Island. Elsewhere, however, REC prices

for compliance markets fell (e.g., for Ohio's in-state RPS requirements) or remained below $5/MWh, due to a

continued surplus of eligible renewable energy supply relative to RPS-driven demand. Prices for RECs offered in

the national voluntary market remained below $1/MWh, while voluntary wind RECs in the West declined to

below $5/MWh over the course of the year.

$10

$20

$30

$40

Jan-05

Jul-05

Jan-06

Jul-06

Jan-07

Jul-07

Jan-08

Jul-08

Jan-09

Jul-09

Jan-10

Jul-10

Jan-11

Jul-11

Jan-12

Low-Price REC Markets

DC Tier 1

DE Class I

IL Wind

MD Tier 1

NJ Class I

OH Out-of-State

PA Tier 1

Voluntary Wind (National)

Voluntary Wind (West)

$20

$40

$60

$80

Jan-05

Jul-05

Jan-06

Jul-06

Jan-07

Jul-07

Jan-08

Jul-08

Jan-09

Jul-09

Jan-10

Jul-10

Jan-11

Jul-11

Jan-12

High-Price REC Markets

CT Class I

MA Class I

ME New

NH Class I

RI New

OH In-State

2011 $/MWh

Sources: Evolution Markets (through 2007) and Spectron (2008 onward). Plotted values are the last monthly trade (if available) or

the mid-point of monthly Bid and Offer prices, for the earliest compliance year traded in each month (compliance markets) or for

the current or nearest year traded in each month (voluntary markets).

2011 Wind Technologies Market Report

of the twenty-three pricing nodes represented by the blue-shaded area). The red dots show the

cumulative capacity-weighted average price received by wind power projects in each year among

those projects in the sample with commercial operation dates of 1998 through 2011 (consistent

with the data first presented in Figure 31).

At least on a cumulative basis within the sample of projects reported here, average wind power

prices compared favorably to wholesale electricity prices from 2003 through 2008. Starting in

2009, however, increasing wind power prices, combined with a sharp drop in wholesale

electricity prices (driven by lower natural gas prices), pushed average wind energy prices to the

top of (and in 2011 above) the wholesale power price range. Although low natural gas prices

are, in part, attributable to a slow economic recovery, gas prices may not ultimately rebound to

earlier levels as the economy recovers, due to the ongoing development of significant shale gas

deposits. Reduced expectations for natural gas price levels going forward puts the near-term

comparative economic position of wind energy at some risk, absent further reductions in the

price of wind power (and absent supportive policies for wind energy). That said, as shown

earlier in Figures 33 and 34, pricing among recently signed wind PPAs – in some cases for

projects that will be built in 2012 – is already largely competitive with the wholesale power price

range for 2011 shown in Figure 36.

Source: Berkeley Lab, FERC, Ventyx, ICE

Figure 36. Average Cumulative Wind and Wholesale Electricity Prices over Time

Though Figure 36 portrays a national comparison, there are clearly regional differences in

wholesale electricity prices and in the average price of wind power. Figure 37 focuses on 2011

wind and wholesale electricity prices in the same regions as shown earlier, based only on the

sample of wind power projects installed in 2010 and 2011.

Although there is quite a bit of

variability within some regions, and several regions again have limited sample size, the spread

between average wind power and wholesale electricity prices (i.e., the wind power premium) in

As discussed in footnote 67, the average wind power prices presented here for Texas and New England in

particular should be viewed with caution.

2003 2004 2005 2006 2007 2008 2009 2010 2011

47 projects 64 projects 80 projects 97 projects 120 projects 150 projects 184 projects 233 projects 271 projects

2,294 MW 3,103 MW 4,056 MW 4,987 MW 7,980 MW 10,535 MW 13,701 MW 17,190 MW 20,189 MW

2011 $/MWh

Nationwide Wholesale Power Price Range (for a flat block of power)

Cumulative Capacity-Weighted Average Wind Power Price (with 25% and 75% quartiles)

Wind project sample includes

projects built from 1998-2011

2011 Wind Technologies Market Report

each region in 2011 is fairly consistent across much of the United States. Again, though,

recently signed wind PPAs – particularly in Texas, and the Heartland and Mountain regions (e.g.,

see the “wind belt” in Figure 34) – are more competitive than shown in Figure 37.

Source: Berkeley Lab, Ventyx, ICE

Figure 37. Wind and Wholesale Electricity Prices by Region: 2010-2011 Projects Only

Important Note: Notwithstanding the comparisons made in Figures 36 and 37, it should be

recognized that neither the wind nor wholesale electricity prices presented in this section reflect

the full social costs of power generation and delivery. Specifically, the wind power prices are

suppressed by virtue of federal and, in some cases, state tax and financial incentives.

Furthermore, these prices do not fully reflect integration, resource adequacy, or transmission

costs. At the same time, wholesale electricity prices do not fully reflect transmission costs, may

not fully reflect capital and fixed operating costs, and are suppressed by virtue of any financial

incentives provided to fossil-fueled generation and by not fully accounting for the environmental

and social costs of that generation. In addition, wind power prices – once established – are

typically fixed and known (because wind energy is often sold through long-term, fixed-price

power purchase agreements), whereas wholesale electricity prices are short-term and therefore

subject to change over time. Moreover, as discussed earlier, the historical wind power prices

presented here are not necessarily representative of PPAs being negotiated today based on the

lower turbine pricing environment that now prevails. Finally, the location of the wholesale

electricity nodes and the assumption of a flat-block of power are not perfectly consistent with the

location and output profile of the sample of wind power projects.

In short, comparing wind and wholesale electricity prices in this manner is not appropriate

if one’s goal is to fully account for the costs and benefits of wind energy relative to its

competition. Another way to think of Figures 36 and 37, however, is as loosely representing the

decision facing wholesale electricity purchasers that are otherwise under no obligation to

purchase additional amounts of wind energy – i.e., whether to contract long-term for wind power

or to buy a flat block of (non-firm) spot power on the wholesale electricity market. In this sense,

the costs represented in Figures 36 and 37 are reasonably comparable, in that they represent (to

some degree, at least) what the power purchaser would actually pay.

100

120

Texas Heartland Mountain New England Great Lakes East Northwest California Total US

1 project 23 projects 6 projects 3 projects 5 projects 5 projects 7 projects 10 projects 60 projects

78 MW 1,395 MW 868 MW 113 MW 600 MW 314 MW 724 MW 1,088 MW 5,180 MW

Average 2011 Wholesale Power Price Range

2011 Capacity-Weighted Average Wind Power Price

Individual Project 2011 Wind Power Price

Wind project sample includes projects built in 2010 and 2011

2011 $/MWh

2011 Wind Technologies Market Report

7. Policy and Market Drivers

Uncertainty Reigns in Federal Incentives for Wind Energy Beyond 2012

A variety of policy drivers at both the federal and state levels have been important to the

expansion of the wind power market in the United States. At the federal level, the most

important policy incentives in recent years have been the PTC, accelerated tax depreciation, and

two Recovery Act provisions that enabled wind power projects to elect, for a limited time only,

either a 30% investment tax credit (ITC) or a 30% cash grant in lieu of the PTC. Also of more-

limited import to wind development has been the Department of Energy's loan guarantee

program.

• First established by the Energy Policy Act of 1992, the PTC provides a 10-year, inflation-

adjusted credit that stood at 2.2¢/kWh in 2011. The historical importance of the PTC to the

U.S. wind power industry is illustrated by the pronounced lulls in wind power capacity

additions in the three years (2000, 2002, and 2004) in which the PTC lapsed, as well as the

increased development activity often seen during the year in which the PTC is otherwise

scheduled to expire (see Figure 1). Wind power projects are currently eligible for the PTC if

they achieve commercial operations by the end of 2012.

• Accelerated tax depreciation enables wind project owners to depreciate the vast majority of

their investments over a five- to six-year period for tax purposes. An even-more-attractive

50% first-year “bonus depreciation” schedule was in place during 2008-2010. The Tax

Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010 that was

signed into law in mid-December 2010 increased first-year bonus depreciation to 100% for

those projects placed in service between September 8, 2010 and the end of 2011, after which

the first-year bonus reverted to 50% for projects placed in service during 2012.

• The Recovery Act enabled wind power projects placed in service prior to the end of 2012 to

elect a 30% ITC in lieu of the PTC. More importantly, given the relative scarcity of tax

equity in the wake of the financial crisis, Section 1603 of the Recovery Act also enabled

wind power projects to elect a 30% cash grant from the Treasury in lieu of either the ITC or

the PTC. More than 60% of the new wind capacity installed in 2011 elected the Section

1603 grant. In order to qualify for the grant, wind power projects must have been under

construction by the end of 2011, must apply for a grant by October 1, 2012, and must be

placed in service by the end of 2012.

• Another Recovery Act program, the Section 1705 loan guarantee program for commercial

projects, has also wound down, as projects had to be under construction by September 30,

2011 in order to qualify. In total, this program closed on four loan guarantees to wind power

projects totaling 1,024 MW of capacity, 285 MW of which were online by the end of 2011.

With the PTC, 30% ITC, 30% cash grant, and bonus depreciation all currently scheduled to

expire at the end of 2012 for new wind projects,

the wind energy sector is currently

experiencing serious federal policy uncertainty, and therefore rushing to complete projects by the

Although eligibility for the Treasury grant does hinge on construction having begun by the end of 2011,

complying with this interim start-of-construction deadline is unlikely to have been particularly onerous for most

wind power projects, based on safe harbor guidance published by the Treasury.

2011 Wind Technologies Market Report

end of the year. Moreover, 2011 saw another year pass without any concrete Congressional

action on what are seemingly the wind power industry’s two highest priorities – a longer-term

extension of federal tax (or cash) incentives and passage of a federal renewable or clean energy

portfolio standard.

Though the lack of long-term federal incentives for wind energy has been a drag on the industry,

new and accelerated federal activity in wind project siting and permitting has been viewed as a

net positive. In March 2012, for example, the Department of Interior released voluntary

guidelines designed to help wind power projects avoid and minimize impacts to wildlife,

reducing the perceived risk and uncertainty that preceded the release. Progress also continued to

be made on streamlining the process of developing wind power projects on public lands.

State Policies Play a Role in Directing the Location and Amount of Wind

Power Development, but Current Policies Cannot Support Continued

Growth at the Levels Seen in the Recent Past

From 1999 through 2011, 65% of the wind power capacity built in the United States was located

in states with RPS policies; in 2011, this proportion was 78%.

As of July 2012, mandatory

RPS programs existed in 29 states and Washington D.C. (Figure 38). Although no new state

RPS policies were passed in 2011, a number of states strengthened previously established RPS

programs.

In aggregate, existing state RPS policies are estimated to require roughly 100 GW

of new renewable capacity by 2035, beyond what was already installed in each RPS state at the

time that its RPS policy was established.

This required additional renewable capacity is

equivalent to roughly 7% of total projected U.S. retail electricity sales in 2035 and 34% of

projected load growth between 2000 and 2035.

Given the size of the RPS targets and the amount of new renewable energy capacity already

built, existing state RPS programs are projected to drive average annual renewable energy

additions of roughly 4-5 GW/year (not all of which will be wind) between 2012 and 2020.

This is well below the amount of wind power capacity added in 2011, and even further below the

9 GW of total renewable capacity added in 2011 (which included roughly 2 GW of solar

capacity), demonstrating the limitations of relying exclusively on state RPS programs to drive

future wind power development.

Such statistics provide only a rough indication of the impact of RPS policies on wind power development, and

could either overstate or understate the actual policy effect to-date.

Attempts to weaken RPS programs have also been initiated in some states, though those efforts have not thus far

led to meaningful changes in RPS design.

Berkeley Lab’s projections of new renewable capacity required to meet each state’s RPS requirements assume

different combinations of renewable resource types for each RPS state, though they do not assume any biomass co-

firing at existing thermal plants. To the extent that RPS requirements are met with a larger proportion of high-

capacity-factor resources than assumed in this analysis or with biomass co-firing at existing thermal plants, the

required new renewable capacity would be lower than the projected amount presented here.

Again, varying combinations of renewable resource types for each RPS state were assumed in estimating the 4-5

GW/year of average annual renewable capacity additions required to meet RPS obligations through 2020.

2011 Wind Technologies Market Report

Non-Binding Goal

Source: Berkeley Lab

WI: 10% by 2015

NV: 25% by 2025

TX: 5,880 MW by 2015

PA: 8.5% by 2020

NJ: 22.5% by 2020

CT: 23% by 2020

MA: 11.1% by 2009 +1%/yr

ME: 40% by 2017

NM: 20% by 2020 (IOUs)

10% by 2020 (co-ops)

CA: 33% by 2020

MN: 25% by 2025

Xcel: 30% by 2020

IA: 105 MW by 1999

MD: 20% by 2022

RI: 16% by 2019

HI: 40% by 2030

AZ: 15% by 2025

NY: 30% by 2015

CO: 30% by 2020 (IOUs)

10% by 2020 (co-ops and munis)

MT: 15% by 2015

DE: 25% by 2025

DC: 20% by 2020

WA: 15% by 2020

NH: 23.8% by 2025

OR: 25% by 2025 (large utilities)

5-10% by 2025 (smaller utilities)

NC: 12.5% by 2021 (IOUs)

10% by 2018 (co-ops and munis)

IL: 25% by 2025

Mandatory RPS

VT: 20% by 2017

ND: 10% by 2015

VA: 15% by 2025

MO: 15% by 2021

OH: 12.5% by 2024

SD: 10% by 2015

UT: 20% by 2025

MI: 10% by 2015

KS: 20% of peak

demand by 2020

OK: 15% by 2015

AK: 50% by 2025

Note: The figure does not include West Virginia's mandatory “alternative and renewable energy portfolio standard” or Indiana's

voluntary "clean energy standard." Under these two states' policies, both renewable and non-renewable energy resources may

qualify, but neither state specifies any minimum contribution from renewable energy. Thus, for the purposes of the present report,

these two states are not considered to have enacted mandatory RPS policies or non-binding renewable energy goals.

Figure 38. State RPS Policies and Non-Binding Renewable Energy Goals (as of July

2012)

In addition to state RPS policies, utility resource planning requirements, principally in Western

and Midwestern states, have also helped spur wind power additions in recent years, as has

voluntary customer demand for “green” power. State renewable energy funds provide support

for wind power projects (both financial and technical) in some jurisdictions, as do a variety of

state tax incentives. Finally, concerns about the possible impacts of global climate change

continue to fuel interest in some states and regions to implement and enforce carbon reduction

policies. The Northeast’s Regional Greenhouse Gas Initiative (RGGI) cap-and-trade policy, for

example, has been operational for several years, and California’s greenhouse gas cap-and-trade

program commenced operation in 2012, though carbon pricing seen to date under RGGI has

been too low to drive significant wind energy growth. At the same time, other states have

expressed growing skepticism of these efforts, and a number of states have withdrawn, or

undertaken steps toward withdrawal, from regional greenhouse gas reduction initiatives,

including RGGI and the Western Climate Initiative.

Despite Progress on Overcoming Transmission Barriers, Constraints

Remain

Transmission development has continued to gain traction during recent years. The North

American Electric Reliability Corporation (NERC), for example, reported that about 2,300

circuit miles of new transmission additions were under construction in the United States near the

end of 2011, with an additional 17,800 circuit miles planned through 2015 (NERC 2011). The

Brattle Group, meanwhile, has estimated that planned and proposed transmission projects

represent around $60-80 billion in potential investments from 2011 through 2015 (Pfeifenberger

2011 Wind Technologies Market Report

2012). Finally, AWEA has identified near-term transmission projects that – if all were

completed – could carry almost 45 GW of wind power capacity (AWEA 2012a).

Lack of transmission can be a barrier to new wind power development, and insufficient

transmission capacity in areas where wind projects are already built can lead to curtailment, as

illustrated by the data on wind energy curtailment reported earlier. New transmission is

particularly important for wind energy because wind power projects are constrained to areas with

adequate wind speeds, which are often located at a distance from load centers. There is also a

mismatch between the relatively short timeframe often needed to develop a wind power project

compared to the longer timeframe typically required to build new transmission. Uncertainty over

transmission siting and cost allocation, particularly for multi-state transmission lines, further

complicates transmission development.

In July 2011, FERC issued Order No. 1000, which requires public utility transmission providers

to improve transmission planning processes and to determine a cost allocation methodology for

new transmission facilities. The transmission planning requirements established in the new rule

include development of regional transmission plans, mandatory participation in regional

transmission planning, consideration of transmission needs driven by public policy requirements

established by state and federal regulations (such as RPS programs), and coordination between

neighboring transmission planning regions. In addition, each public utility transmission provider

is now required to develop a common regional methodology for allocating the costs for new

transmission facilities consistent with six principles for both intra-regional and inter-regional

facilities. The methodology can include different cost allocation schemes for projects driven by

different needs, i.e., reliability, economic, and public policy (FERC 2011a). Initial compliance

filings under Order No. 1000 are due in October 2012.

States, grid operators, utilities, regional organizations, and DOE continue to take proactive steps

to encourage transmission investment and improve access to renewable resources. A non-

exhaustive list of these initiatives is presented below:

• Bonneville Power Administration (BPA): As a result of the Network Open Season

initiative, BPA processed 263 transmission service requests from 2008-2010, including 7,105

MW associated with wind power. However, due to uncertainty regarding proposed wind

projects and that the success of the Network Open Season was more than BPA anticipated,

plans for future Network Open Seasons have been put on hold until BPA conducts a review

of transmission planning and wind energy integration issues. In February 2012, BPA

completed the 79-mile 500-kV McNary-John Day transmission project, which can support up

to 575 MW of wind power capacity. The Network Open Season initiative also prompted the

development of the 28-mile Big Eddy-Knight transmission project; completion is expected in

2013. Separately, in January 2012, BPA signed a Memorandum of Understanding with

NorthWestern Energy to explore the possibility of participating in the development of the

Mountain States Transmission Intertie that would extend from Montana to Idaho.

• Southwest Power Pool (SPP): In October 2011, FERC denied requests for rehearing, and

thereby upheld, its 2010 order accepting SPP’s “Highway/Byway” transmission cost

allocation methodology (FERC 2011b). In early 2012, the SPP Board of Directors approved

a near-term transmission expansion plan that will result in the construction of $251 million in

new transmission projects over the next five years. SPP’s board also approved a 10-year

2011 Wind Technologies Market Report

transmission expansion plan, with projects representing an additional $1.5 billion in

transmission investment.

• Midwest Independent Transmission System Operator (MISO): In late October 2011,

FERC upheld its December 2010 acceptance of MISO’s regional cost allocation

methodology for multi-value projects (MVP), subject to a FERC requirement that MISO

monitor the cumulative costs and benefits of all approved MVP projects (FERC 2011c). In

December 2011, the MISO Board of Directors approved the MISO Transmission Expansion

Plan, which includes 215 projects, representing 3,665 circuit-miles of new or upgraded

transmission lines, and requires about $6.5 billion in potential transmission investment over

the next 5 to 7 years. The plan includes 17 MVPs, representing about $5.1 billion. Together

with the previously approved MVPs, the 17 MVPs could connect as much as 14,000 MW of

wind power capacity (AWEA 2012a). Also in MISO, the CapX2020 Monticello to St. Cloud

345-kV transmission line in Minnesota was energized in late December 2011, the first

CapX2020 project to be completed and placed in service.

• Texas Competitive Renewable Energy Zones (CREZ): The 2,300 circuit-miles of Texas

CREZ lines are largely on track to be completed by the end of 2013, and are expected to

accommodate a total of 18,500 MW of wind power capacity. Since 2008, the initial cost

estimate of about $4.9 billion has increased by over 40%, to almost $7 billion (PUCT 2012).

It is also now estimated that it may take several years or more for developers to build enough

wind power capacity to fully utilize the CREZ lines planned for West Texas and the Texas

Panhandle area because of lower natural gas prices, slower load growth, and the difficulty of

securing project financing for wind power development. Nevertheless, the potential for wind

energy development along the Texas Gulf Coast has spurred recent discussions regarding a

second phase of CREZ.

• Western Area Power Administration (WAPA): WAPA received $3.25 billion in

borrowing authority under the Recovery Act for developing new transmission. In September

2011, WAPA and TransWest Express (TWE) agreed to fund the development phase of the

TransWest Express transmission project, a proposed 725-mile, 600-kV transmission line that

could deliver up to 3,000 MW of renewable energy from Wyoming to the Marketplace Hub,

near Las Vegas. If WAPA continues its participation in the project into the construction

phase – a decision that will be made when the environmental analysis is completed –

additional borrowing authority would be used to help fund the project. Meanwhile, a DOE

Inspector General report released in November 2011 criticized WAPA for failing to

implement safeguards for protecting the $161 million WAPA has committed towards the

construction of the Montana-Alberta Transmission Line, a controversial project that is

currently facing legal challenges. Should it be completed, the 214-mile, 230-kV line would

deliver up to 300 MW in either direction.

• California ISO (CAISO): According to the CAISO’s 2011-2012 Transmission Plan,

enough transmission capacity to meet California’s 33% RPS goal by 2020 is either under

development or in planning. Of the $7.1 billion in transmission projects included in the plan,

a number of them have already been approved and permitted, including: the Sunrise

Powerlink, the Tehachapi Transmission project, the Colorado River-Valley line, the

Eldorado-Ivanpah line, and the Carrizo-Midway reconductoring (CAISO 2012b). The

Sunrise Powerlink transmission line was completed in June 2012, and will be capable of

transmitting up to 1,000 MW of renewable energy. SDG&E, the developer of the Sunrise

Powerlink, recently signed long-term PPAs with Pattern Wind Energy and Manzana Wind

2011 Wind Technologies Market Report

for 315 MW and an additional 100 MW of wind energy to flow across the line. The

Tehachapi Transmission project, which is being developed by Southern California Edison

(SCE), is expected to accommodate up to 4,500 MW of new generation, much of it

potentially wind, once completed in 2015. In late 2011, however, the California Public

Utilities Commission ordered SCE to stop construction on a segment of the project that runs

through Chino Hill, California. The City of Chino Hills and SCE have yet to come to a

mutual agreement on an alternative route, which may push back the in-service date of the

project.

Three RTOs are also in various stages of reforming their interconnection queue processes. In

early 2012, FERC accepted a set of revisions to CAISO’s generator interconnection procedures

that: allow power plants to request partial deliverability status, which could reduce the cost of

network upgrades; provide for reimbursement of network upgrades for projects built in phases;

divide the cost of financial security for network upgrades into separate components to align with

construction phases; and allow customers to cut generation capacity by up to 5% for any reason

between the effective date of an interconnection agreement and the commercial operation date.

In May 2012, CAISO proposed further revisions to its interconnection queue process, which are

currently being evaluated at FERC. In February 2012, PJM Interconnection filed a petition to

FERC to make three modifications to its Open Access Transmission Tariff: a six-month queue

cycle to replace the current three-month planning cycle; allowing a project to decrease in size

during the study process; and establishing an alternate queue for projects smaller than 20 MW

that connect to distribution level facilities and do not cause the need for upgrades to the PJM

transmission system. Finally, in March 2012, FERC conditionally approved a proposal from

MISO that addresses backlogs and late-stage terminations of generation interconnection

agreements. In addition to revised timelines and new study procedures, the reforms require

interconnection customers to put more money at risk earlier in the process with the justification

being that the projects that remain in the queue are those that are more likely to reach

commercial operations.

Progress was also reported under interconnection-wide planning supported by previous grants

from the DOE. In December 2011, the Eastern Interconnection Planning Collaborative

submitted its phase one report to DOE, which focused on the integration of regional plans and

long-term macroeconomic analysis. Phase two of the project will focus on conducting

transmission studies based on three scenarios, which will include reliability studies as well as

various options for transmission expansion plans. In the Western Interconnection, the Western

Electricity Coordinating Council completed its first 10-Year Regional Transmission Plan in

September 2011. Also in 2011, the Texas Interconnection’s Long-Term Study Task Force

submitted to DOE its interim status report for the ERCOT Long-Term Transmission Analysis.

ERCOT’s Task Force will submit its final report to DOE by June 2013. In addition, the Obama

Administration is attempting to expedite the construction of seven backbone transmission

projects with the formation of the Rapid Response Team for Transmission which seeks to

streamline federal permitting and improve cooperation among federal, state, and tribal

governments. The proposed projects include over 3,100 miles of new transmission lines spread

across 12 states.

Finally, numerous transmission projects have been planned, in part, to accommodate the growth

of wind energy throughout the country. Examples of some of these projects are described below.

2011 Wind Technologies Market Report

• Construction began on the first segment of the Michigan Thumb Loop Transmission Project

in early 2012. Once completed in 2015, the 140-mile transmission project will transport

wind energy to load centers in Michigan.

• Duke-American Transmission Company, a joint venture between Duke Energy and

American Transmission Company, announced plans to invest about $4 billion in seven

transmission projects in five Midwestern states. Also, in late 2011, DATC acquired the 500-

kV Zephyr transmission line project, which could transmit 3,000 MW of renewable energy

between Wyoming and southern Nevada if completed in 2020, four years later than the

original planned in-service date.

• Los Angeles Department of Water and Power’s proposed Barren Ridge Renewable

Transmission Project is expected to provide 1,100 MW of transmission capacity to transport

wind and solar resources from the Tehachapi Mountains and Mojave Desert to the San

Fernando Valley. The draft environmental analysis documents were released for public

review in August 2011. Assuming the project proceeds, construction will begin in 2013,

with a target in-service date of 2016.

Though a number of transmission projects have progressed, others have been delayed or scaled

back. Due to a lowered demand forecast, for example, Xcel Energy dropped a transmission

project that would have allowed up to 1,500 MW of renewable energy to be transported from the

San Luis Valley to the Denver metropolitan area. In 2012, PacifiCorp announced plans to scale

back the Energy Gateway Transmission Project.

Integrating Wind Energy into Power Systems Is Manageable, but Not Free

of Costs, and System Operators Are Implementing Methods to

Accommodate Increased Penetration

There has been a considerable amount of attention paid to the potential impacts of wind energy

on power systems in recent years. Concerns about, and solutions to, these issues have affected,

and continue to impact, the pace of wind power deployment in the United States. Experience in

operating power systems with wind energy is also increasing worldwide (Jones 2011).

Figure 39 provides a selective listing of estimated wind integration costs

and Figure 40

summarizes the estimated increase in balancing reserves

associated with increased wind energy

from integration studies completed from 2003 through 2011 at various levels of wind power

The integration costs considered in these studies typically refer to the costs associated with accommodating the

variability and uncertainty associated with wind energy. Generally, these costs are associated with three different

time frames: regulation – from seconds to a few minutes; load-following – tens of minutes to a few hours; and unit

commitment – out to the next day or two. Studies often, but not always, estimate these costs as the difference in

overall electric system production costs between a scenario that captures the variability and unpredictability of wind

energy and a scenario with an energy-equivalent block of power having no variability or uncertainty.

In general, these balancing reserves reflect the resources required to maintain system balance between schedules.

Often studies have balancing reserve requirements that change depending on the level of wind electricity generation

or the time of day (Ela et al. 2011). The balancing reserves in the figure represent either the average reserves or the

maximum increase in reserves depending on which statistics are reported by the study authors.

2011 Wind Technologies Market Report

capacity penetration.

77,78

System operators use reserves to balance variability and uncertainty

between scheduling periods, and scheduling periods vary, so Figure 40 separates balancing

reserves by the duration of the scheduling period assumed in the study. Regions with fast energy

markets, for example, change the schedule of dispatchable generators over 5-minute periods

while other regions often use hourly schedules.

Because methods vary and a consistent set of

operational impacts has not been included in each study, results from the different analyses of

integration costs (Figure 39) and balancing reserves (Figure 40) are not fully comparable. Note

also that the rigor with which the various studies have been conducted varies, as does the degree

of peer review. Finally, there has been some recent literature questioning the methods used to

estimate wind integration costs and the ability to explicitly disentangle those costs, while also

highlighting potential integration costs associated with other generation options (Milligan et al.,

2011).

[a] Costs in $/MWh assume 31% capacity factor.

[b] Costs represent 3-year average.

[c]

Highest over 3-year evaluation period.

[d] Higher cost line adds the coal cycling costs found in Xcel Energy (2011).

Sources: Acker (2007) [APS (2007)]; EnerNex Corp. (2007) [Avista (2007)]; BPA (2009); BPA (2011c); Shiu et al. (2006) [CA RPS

(2006)]; EnerNex Corp (2010) [EWITS (2010)]; EnerNex Corp. and Idaho Power Co. (2007) [Idaho Power (2007)]; EnerNex Corp.

and WindLogics Inc. (2006) [MN-MISO (2006)]; EnerNex et al. (2010) [Nebraska (2010)]; PacifiCorp (2005); PacifiCorp (2007);

PacifiCorp (2010); PGE and EnerNex Corp.(2011) [Portland GE (2011)]; Puget Sound Energy (2007); EPRI (2011) [SPP-SERC

(2011)]; Electrotek Concepts, Inc. (2003) [We Energies (2003)]; EnerNex Corp. and WindLogics, Inc. (2004) [Xcel-MNDOC (2004)];

EnerNex Corp. (2006) [Xcel-PSCo (2006)]; EnerNex Corp. (2008) [Xcel-PSCo (2008)]; Xcel Energy and EnerNex Corp. (2011)

[Xcel-PSCo (2011)]; Brooks et al. (2003) [Xcel-UWIG (2003)]

Figure 39. Integration Costs at Various Levels of Wind Power Capacity Penetration

Wind power penetration on a capacity basis (defined as nameplate wind power capacity serving a region divided

by that region’s peak electricity demand) was frequently used in earlier integration studies. For a given amount of

wind power capacity, penetration on a capacity basis is typically higher than the comparable wind penetration in

energy terms (because, over the course of a year, wind power projects generally operate at a lower percentage of

their rated capacity, on average, than does aggregate load).

Some studies address capacity valuation for resource adequacy purposes; those results are not presented here.

Over half the load in the U.S. is now in regions with 5-minute scheduling: PJM, MISO, ERCOT, NYISO, ISO-

NE, and CAISO.

2011 Wind Technologies Market Report

[a] Includes some solar energy in addition to wind energy.

[b] 3-year average.

[c] Small, isolated island system.

Sources: See Figure 39; GE (2007) [CA IAP (2007)] ; CAISO (2007); CAISO (2010); GE (2008) [ERCOT (2008)]; GE (2010a) [ISO-

NE (2010)]; GE (2005) [New York (2005)]; NYISO (2010); Shoucri (2011) [Northwestern (2011)]; GE (2011a) [Oahu (2011)];

Charles River Associates (2010) [SPP(2010)]; GE (2010b) [WWSIS (2010)]

Figure 40. Incremental Balancing Reserves at Various Levels of Wind Power Capacity

Penetration

In addition to balancing reserve requirements and wind integration costs, these and other studies

have also focused on identifying the required changes to existing practices in power system

operations, the role of forecasting, and the capability of thermal and hydropower generators to

provide the needed flexibility to integrate wind power. A sizable portion of these studies have

been conducted by or commissioned by RTOs and ISOs (e.g. CAISO, ERCOT, SPP, New York

Independent System Operator (NYISO), and Independent System Operator – New England

(ISO-NE); PJM is currently conducting an integration study that is expected to be complete in

2013). Key conclusions that continue to emerge from the growing body of integration literature

include the following:

• Wind integration costs estimated by all studies reviewed are below $12/MWh – and often

below $5/MWh – for wind power capacity penetrations of up to and even exceeding 40% of

the peak load of the system in which the wind power is delivered.

Variations in estimated

costs across studies are due, in part, to differences in methodologies, definitions of

These integration cost estimates compare to levelized wind PPA prices that ranged from $25/MWh to $60/MWh

among contracts signed in 2011 (as shown earlier in Figure 34). The relatively low integration cost estimates in the

2006 Minnesota study and the 2010 Nebraska study, despite aggressive levels of wind power penetration, are partly

a result of relying on the broader regional electricity market to accommodate certain elements of integrating wind

energy into system operations. Conversely, the higher integration costs found by Avista, Idaho Power, and

PacifiCorp, and Portland General Electric are, in part, caused by the relatively smaller markets in which the wind

energy is being absorbed and by those utilities’ operating practices. Specifically, the Northwest currently uses

hourly scheduling intervals rather than the sub-hourly markets common in ISOs and RTOs. A sensitivity case in the

Avista Utilities study demonstrates that the use of a 10-minute transaction scheduling interval would decrease the

cost of integrating wind energy by 40-60%.

2011 Wind Technologies Market Report

integration costs, power system and market characteristics, wind energy penetration levels,

fuel price assumptions, and the degree to which thermal power plant cycling costs are

included.

• Larger balancing areas, such as those found in RTOs and ISOs, make it possible to integrate

wind energy more easily and at lower cost than is the case in smaller balancing areas.

Coordination among smaller balancing areas can reduce the cost of wind integration.

• The successful use of wind power forecasts by system operators can significantly reduce

integration challenges and costs. Intra-hour transmission scheduling and generator dispatch

(e.g., 5-minute scheduling and dispatch) provides access to flexibility in conventional power

plants that, among other benefits, lowers the costs of integrating wind energy.

• Thermal plant cycling costs are increasingly being highlighted and may contribute to the

costs and challenges associated with integrating wind. Among other studies of cycling costs,

the Western Wind and Solar Integration Study Phase II and the PJM wind integration study,

both due to be completed within the next year, will include an assessment of cycling costs.

Strategies for mitigating thermal plant damages associated with cycling should be

investigated further.

• The increase in balancing reserves with increased wind power penetration is projected to be

typically less than 15% of the nameplate capacity of wind power and often considerably less

than this figure, particularly in studies that use intra-hour scheduling. The high balancing

reserve finding in the NorthWestern study (Shoucri 2011) reflects the issues with hourly

scheduling and small balancing areas. A number of studies indicate that the amount of

balancing reserves needed at any particular time changes with different wind and load

conditions. Setting dynamic balancing reserve requirements that respond to these changes in

conditions can lower integration costs.

ISOs and utilities are continuing to take important steps to mitigate the challenges faced with

integrating larger quantities of wind energy.

• Centralized wind energy forecasting systems are currently in place in all ISO/RTOs except

ISO-NE where it is scheduled to become operational by the start of 2013. A large number of

electric utilities are also now using centralized wind forecasting in their operations (Rogers

and Porter, 2011; Porter and Rogers, 2012). Wind forecasting was identified to be a key

prerequisite to successful integration of wind into power system operations in a worldwide

survey of grid operators that together currently manage over 141 GW of wind (Jones 2011).

• In 2011, FERC conditionally approved a Midwest ISO proposal to implement Look Ahead

Commitment that every 15-minutes automatically evaluates the need to commit additional

quick-start power plants over the next few hours based on current conditions and near-term

forecasts of load, wind, and scheduled interchanges (FERC 2012a).

• CAISO also sought FERC approval to include a Flexible Ramp Constraint in its tariff and is

further developing a Flexible Ramping Product (FERC 2011d). CAISO is proposing to

commit a certain amount of additional generation capability during early stages of the

market, based on estimates of potential short-term variability and uncertainty, to then be used

to balance the system in later stages of the market. For example, some additional generation

capability will be committed in the day-ahead market so that the additional generation

capability will be available for balancing in the real-time market. Similarly, the CAISO will

set aside generation in one real-time dispatch interval in order to ensure that adequate

2011 Wind Technologies Market Report

resources will be available to be dispatched in subsequent dispatch intervals. The ramping

product differs from standard reserves in that the additional generation that is set aside in one

energy market interval is then released to be dispatched in a later energy market interval,

whereas reserves are not generally meant to be dispatched as part of the energy market

(CAISO 2012a).

• Intra-hour scheduling pilots began for several balancing authorities in the West, and intra-

hour scheduling changes (primarily half-hour changes) are increasingly being used, though

practices are not yet fully standardized among balancing areas. A platform to enable faster

bilateral transactions, the Intra-hour Transaction Accelerator Platform (I-TAP), also launched

in 2011. Inter-regional interchange scheduling on a sub-hourly basis between different

organized markets is similarly under investigation within the Eastern Interconnection.

• An energy imbalance market for the Western Interconnection, with many similarities to the

SPP imbalance market, was proposed and, if developed, would provide a sub-hourly, real-

time energy imbalance market providing centralized, automated, interconnection-wide

generation dispatch within the Western Interconnection (WECC 2010). Studies show

benefits – due in part to a reduction in balancing reserves – and costs that depend on the way

that the energy imbalance market is implemented (WECC 2011). Two low-cost options

would leverage the existing structure and expertise of either SPP or the CAISO to implement

and operate parts of the energy imbalance market.

Some utilities are now directly charging wind power projects for balancing services.

BPA, for

example, includes a wind energy balancing charge in its transmission tariff equivalent to about

$5.40/MWh. The charge for wind energy that participates in BPA's Committed Intra-hour

Scheduling Pilot program in which wind generators submit schedules every half-hour rather than

every hour is reduced to about $3.60/MWh. More frequent scheduling by wind resources in the

pilot program allows BPA to reduce its balancing reserve requirement and the savings are passed

on as a decreased wind balancing rate (BPA 2011). FERC has also approved a higher generator

regulation and frequency response services charge for wind energy in the Westar Energy

balancing area, equivalent to about $0.7/MWh; this interim tariff will be in place until it is

rendered unnecessary through the anticipated implementation of an ancillary services market and

balancing authority area consolidation in SPP (FERC 2010).

Puget Sound Energy (PSE)

proposed an increase in Regulation and Frequency Response Service that charges a higher rate

for wind energy exporting from the PSE balancing area: the resulting charge would be about

$9.5/MWh and is based on an hourly scheduling assumption. The general changes to the rate

schedule were conditionally accepted by FERC, although the methodology and resulting charge

are still being sorted out through a settlement hearing at FERC (FERC 2011f).

Similar charges to recover costs associated with regulation will continue to be evaluated on a

case-by-case basis by FERC according to the decision on integrating variable energy resources in

Order 764 (FERC 2012b). The decision does require that scheduling at 15-min intervals be

In addition, Idaho Power, Avista, and PacifiCorp all discount their published avoided cost payments for qualifying

wind power projects in Idaho by an integration rate that ranges from 7-9% of the avoided cost rate, up to

$6.50/MWh (IPUC 2010). In early 2011, however, the Idaho PUC reduced the maximum size of a qualifying wind

power facility from 10 MW to 100 kW. Projects larger than 100 kW will need to directly negotiate individual

project PPA prices rather than obtaining the published avoided cost rate.

The rate was revised from about $0.8/MWh in 2010 to $0.7/MWh in 2011 based on an error in the methodology

Westar used in its 2010 estimate of the cost of providing the service (FERC 2011e).

2011 Wind Technologies Market Report

offered to transmission customers and that variable energy resources provide data to be used in

production forecasting to the transmission provider. FERC therefore provided guidance that the

design of any generator regulation charges should account for the use of intra-hour scheduling

and production forecasts when determining quantities of regulation service. Furthermore, any

regulation charge that differs across customer classes must take into account any diversity

benefits from aggregating several customer classes with different variability patterns. The

transmission provider must demonstrate that any difference in regulating reserve responsibilities

across customer classes is due to differences in their operating characteristics.

Finally, a study of the frequency response implications of high renewable penetrations in the

California ISO was completed in 2011 (GE 2011b), following an earlier broad assessment of

frequency response issues for FERC (Eto et al. 2010). The CAISO study found that as long as

adequate secondary reserves (regulation and load following) were available to balance wind and

solar, then even in situations with high instantaneous penetrations of variable generation (50% of

load in California and 25% in the rest of WECC), none of the credible conditions examined lead

to stability problems. The results of the CAISO study were generally in agreement with the

earlier frequency response study for FERC.

2011 Wind Technologies Market Report

8. Future Outlook

Wind power capacity additions in 2011 – at 6,816 MW – fell within the range of market

forecasts (4,450-8,000 MW) presented in last year’s edition of the Wind Technologies Market

Report. Key factors driving growth in 2011 included: continued state and federal incentives for

wind energy, recent improvements in the cost and performance of wind power technology, and

the need to meet an end-of-year construction start deadline in order to qualify for the Section

1603 Treasury grant program.

With the Section 1603 grant and federal tax incentives for wind energy currently scheduled to

expire at the end of the year, 2012 is widely expected to be a strong year for new capacity

growth, as wind energy purchasers take advantage of this potentially “limited time only” buying

opportunity that combines federal incentive availability with lower PPA prices (from lower

turbine costs and improved performance), and as developers rush to commission projects before

the expiration of incentives. As a result, with the exception of the EIA (2012) “no sunset”

projection, the remaining forecasts presented in Table 6 predict 2012 additions to range from

7,280 MW to 12,000 MW – i.e., in excess of 2011 additions, and perhaps even surpassing the

previous record set back in 2009. With AWEA (2012c) reporting 1,695 MW installed in the first

quarter of 2012, and another 8,900 MW under construction as of the end of the first quarter, the

industry appears to be on track to fall within that forecast range.

Table 6. Forecasts for Annual U.S. Wind Capacity Additions (MW)

Source

Assumed Status of

Federal Tax

Incentives After 2012

2012 2013 2014

Cumulative

Additions

2012-2014

EIA (2012)

Expired

7,280

1,430

600

9,310

Bloomberg NEF (2012a)

Expired

11,200

1,000

3,000

15,200

Navigant (2011)

Expired

8,500

2,400

13,300

EIA (2012)

Extended Indefinitely

3,230

3,320

580

7,130

BTM (2012)

Presumably Extended

8,250

7,500

9,000

24,750

Bloomberg NEF (2012a)*

Extended – 3 year

11,200

3,100

5,500

19,800

IHS EER (2012)

Extended – 3+ year

12,000

1,200

6,050

19,250

MAKE (2012)

Extended – details n/a

10,700

3,800

4,600

19,100

Navigant (2011)

Extended – 4 year

8,500

7,500

8,000

24,000

*Assumes extension occurs in Q1 2013

Projections for 2013 and beyond are much less certain, but generally show lower wind power

capacity additions. Besides the possible expiration of federal incentives at the end of 2012, other

challenges include: continued low natural gas and wholesale electricity prices; inadequate

transmission infrastructure in some areas; modest electricity demand growth; existing state

policies that are insufficient to support future wind power capacity additions at the levels

2011 Wind Technologies Market Report

witnessed in recent years;

and growing competition from solar energy in certain regions of the

country. Industry hopes for a federal renewable or clean energy standard, or climate legislation,

have also dimmed in the near term.

Given this challenging, but also uncertain, outlook, it is not surprising that forecasts for 2013 and

beyond – as shown in Table 6 – span a particularly wide range, depending in large measure on

assumptions about the possible extension of federal incentives. In a scenario with no PTC

extension, for example, Bloomberg NEF (2012a) predicts a precipitous drop in wind power

installations, with perhaps only 1,000 MW installed in 2013. BTM (2012), on the other hand,

presumably assumes an extension of federal support, leading to relatively stable wind power

additions from 2012 to 2014. Even with a PTC extension, however, most predictions are for

more-modest wind power additions in the near term as the development pipeline takes time to

recharge and considering the other challenges impacting the wind industry; this may be

especially true if a longer term extension is achieved, as industry participants will then not need

to rush to meet yet-another near-term expiration threat.

Regardless of future uncertainties, wind power capacity additions over the past several years, as

well as the additions predicted for 2012, have put the United States on a trajectory that may lead

to 20% of the nation’s electricity demand coming from wind energy by 2030 (see Figure 41). In

May 2008, the U.S. Department of Energy, in collaboration with its national laboratories, the

wind power industry, and others, published a report that analyzed the technical and economic

feasibility of achieving 20% wind energy penetration by 2030 (DOE 2008). In addition to

finding no insurmountable barriers to reaching 20% wind energy penetration, the report also laid

out a potential wind power deployment path that started at 3.3 GW/year in 2007, increasing to

4.2 GW/year by 2009, 6.4 GW/year by 2011, 9.6 GW/year by 2013, 13.4 GW/year by 2015, and

roughly 16 GW/year by 2017 and thereafter, yielding cumulative wind power capacity of 305

GW by 2030. Historical growth over the last six years puts the United States on a trajectory

exceeding this deployment path, a trend that is anticipated to continue in 2012. Nonetheless, all

of the projections for annual capacity additions in 2013 and 2014 – even those that assume PTC

extension (as denoted by the green, rather than red, circles in Figure 41) – fall short of the annual

growth envisioned in the 20% wind energy report for those years, suggesting that there is a very-

real risk that the market will not grow rapidly enough to maintain a long-term trajectory

consistent with a 20% wind energy penetration level by 2030.

Utilities have signed numerous PPAs with projects expecting 2012 online dates – in some cases for more wind

energy than is strictly needed to comply with near-term RPS targets – while PPA availability for projects to be built

in 2013 and later has all but dried up as purchasers await federal tax clarity (Bloomberg NEF 2012c).

2011 Wind Technologies Market Report

Source: DOE (20% wind scenario); AWEA (historical additions): Table 6 (projected additions)

Figure 41. Wind Power Capacity Growth: 20% Wind Report, Actual Installations,

Projected Growth

Ramping up to the annual installation rate of roughly 16 GW per year needed for wind power to

contribute 20% of the nation’s electricity by 2030, and maintaining that rate for a decade, would

be a challenging task. This rate of deployment has not yet been witnessed in the U.S. market,

and is not expected to be achieved in the near term, due to uncertainty in federal policy towards

wind energy after 2012, market expectations for continued low natural gas prices, slow growth in

electricity demand, and uncertainty surrounding future environmental regulations to limit carbon

emissions.

In addition to stable long-term promotional policies, the DOE (2008) report suggests four other

areas where supportive actions may be needed in order to reach such annual installation rates.

First, the nation will need to invest in significant amounts of new transmission infrastructure

designed to access remote wind resources. Second, to more-effectively integrate wind power

into electricity markets, larger power control regions, better wind forecasting, and increased

investment in fast-responding generating plants will be required. Third, siting and permitting

procedures will need to be designed to allow wind power developers to identify appropriate

project locations and move from wind resource prospecting to construction quickly. Finally,

enhanced research and development efforts in both the public and private sector will be required

to lower the cost of offshore wind power, and incrementally improve conventional land-based

wind energy technology.

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025

2026

2027

2028

2029

2030

105

140

175

210

245

280

315

Deployment Path in 20% Wind Report (annual)

Actual Wind Installations (annual)

Deployment Path in 20% Wind Report (cumulative)

Actual Wind Installations (cumulative)

Annual Capacity (GW)

range of annual projections

(green = PTC extension, red = no extension)

Cumulative Capacity (GW)

2011 Wind Technologies Market Report

Appendix: Sources of Data Presented in this Report

Installation Trends

Data on wind power additions in the United States come from AWEA, though methodological

differences noted throughout this report result in some discrepancies in the data presented here

relative to AWEA (2012a). Annual wind power capital investment estimates derive from

multiplying these wind power capacity data by weighted-average capital cost data, provided

elsewhere in the report. Data on non-wind electric capacity additions come primarily from EIA

(for years prior to 2011) and Ventyx’s Velocity database (for 2011), except that solar data come

from the Interstate Renewable Energy Council (IREC) and SEIA/GTM (Solar Energy Industries

Association / GTM Research). Information on offshore wind power development activity in the

United States was compiled by Navigant.

Global cumulative (and 2011 annual) wind power capacity data come from BTM (2012), but are

revised to include the U.S. wind power capacity used in the present report. Wind energy as a

percentage of country-specific electricity consumption is based on year-end wind power capacity

data and country-specific assumed capacity factors that come primarily from BTM (2012), as

revised based on a review of EIA country-specific wind power data. For the United States, the

performance data presented in this report are used to estimate wind energy production. Country-

specific projected wind generation is then divided by country-specific electricity consumption:

the latter is estimated based on actual consumption in 2009 and earlier, escalated at a country-

specific growth rate (assumed to be the same as the rate of growth from 2007 through 2009) to

estimate 2010-2012 consumption (these data come from EIA).

The wind power project installation map was created by NREL, based in part on AWEA’s

database of projects and in part on data from Ventyx’s Velocity database on the location of

individual projects. Estimated wind energy as a percentage contribution to statewide electricity

generation is based on AWEA installed capacity data for the end of 2011 and the underlying

wind power project performance data presented in this report. Where necessary, judgment was

used to estimate state-specific capacity factors. The resulting state wind generation is then

divided by in-state total electricity generation in 2011, based on EIA data. Actual state-level

wind energy penetration figures for 2011 are derived from EIA data.

Data on wind power capacity in various interconnection queues come from a review of publicly

available data provided by each ISO, RTO, or utility. Only projects that were active in the queue

at the end of 2011, but that had not yet been built, are included. Suspended projects are not

included in these listings. Data on projects that are in the nearer-term development pipeline

come from Ventyx (2012) and other sources.

Industry Trends

Turbine manufacturer market share and average turbine size are derived from the AWEA wind

power project database, with some processing by Berkeley Lab. Information on turbine hub

heights and rotor diameters were compiled by Berkeley Lab based on information provided by

turbine manufacturers, standard turbine specifications, Federal Aviation Administration data,

web searches, and other sources.

2011 Wind Technologies Market Report

Information on wind turbine and component manufacturing come from NREL, AWEA, and

Berkeley Lab, based on a review of press reports, personal communications, and other sources.

Data on U.S. nacelle assembly capacity came from Bloomberg NEF (2012a). The listings of

manufacturing and supply chain facilities are not intended to be exhaustive. Data on aggregate

U.S. imports and exports of wind power equipment come primarily from the U.S. International

Trade Commission (USITC), and can be obtained from the USITC’s DataWeb

(http://dataweb.usitc.gov/).

Information on wind power financing trends was compiled by Berkeley Lab. Wind project

ownership and power purchaser trends are based on a Berkeley Lab analysis of the AWEA

project database.

Cost, Performance and Pricing Trends

Wind turbine transaction prices were compiled by Berkeley Lab. Sources of transaction price

data vary, but most derive from press releases, press reports, and Securities and Exchange

Commission filings. In part because wind turbine transactions vary in the services offered, a

good deal of intra-year variability in the cost data is apparent.

Berkeley Lab used a variety of public and some private sources of data to compile capital cost

data for a large number of U.S. wind power projects. Data sources range from pre-installation

corporate press releases to verified post-construction cost data. Specific sources of data include:

EIA Form 412, FERC Form 1, various Securities and Exchange Commission filings, various

filings with state public utilities commissions, Windpower Monthly magazine, AWEA’s Wind

Energy Weekly, DOE/EPRI’s Turbine Verification Program, Project Finance magazine, various

analytic case studies, and general web searches for news stories, presentations, or information

from project developers. For 2009-2011 projects, data from the Section 1603 Treasury Grant

program were used extensively. Some data points are suppressed in the figures to protect data

confidentiality. Because the data sources are not equally credible, little emphasis should be

placed on individual project-level data; instead, it is the trends in those underlying data that offer

insight. Only wind power cost data from the contiguous lower-48 states are included.

Wind project operations and maintenance costs come primarily from two sources: EIA Form

412 data from 2001-2003 for private power projects and projects owned by POUs, and FERC

Form 1 data for IOU-owned projects. Some data points are suppressed in the figures to protect

data confidentiality.

Wind power project performance data are compiled overwhelmingly from two main sources:

FERC’s Electronic Quarterly Reports and EIA Form 923. Additional data come from FERC

Form 1 filings and, in several instances, other sources. Where discrepancies exist among the

data sources, those discrepancies are handled based on the judgment of Berkeley Lab staff. Data

on curtailment are from ERCOT (for Texas), MISO (for the Midwest), Xcel Energy (for its

Northern States Power, Public Service Company of Colorado, and Southwestern Public Service

Company subsidiaries), and from BPA (for the Northwest).

The following procedure was used to estimate the quality of the wind resource in which wind

projects are located. First, the location of individual wind turbines and the year in which those

2011 Wind Technologies Market Report

turbines were installed were identified using FAA Digital Obstacle (i.e., obstruction) files

(accessed via Ventyx’ Intelligent Map) and LBNL data on individual wind projects. Second,

NREL used data from AWS Truepower – specifically, gross capacity factor estimates with a

200-meter resolution – to estimate the quality of the local wind resource at an 80 meter hub

height for each of those turbines. These gross capacity factors are derived from average mapped

wind speed estimates, wind speed distribution estimates, and site elevation data, all of which are

run through a standard wind turbine power curve (common to all sites). Third, using the

resultant average wind resource quality (i.e., gross capacity factor) estimate for turbines installed

in the 1998-99 period as the benchmark, and assigning that period an index value of 100 percent,

comparative percentage changes in average wind resource quality for turbines installed after

1998-99 are calculated. Not all turbines could be mapped by LBNL for this purpose: the final

sample included 25,413 turbines totaling 41,230 MW of capacity installed from 1998 through

2011, or 90% of all wind power capacity installed in the continental United States over that

period.

Wind power price data are based on multiple sources, including prices reported in FERC’s

Electronic Quarterly Reports, FERC Form 1, avoided cost data filed by utilities, pre-offering

research conducted by bond rating agencies, and a Berkeley Lab collection of power purchase

agreements. Wholesale electricity price data were compiled by Berkeley Lab from the

IntercontinentalExchange (ICE) as well as Ventyx’s Velocity database (which itself derives

wholesale price data from the ICE and the various ISOs). Earlier years’ wholesale electricity

price data come from FERC (2007, 2005). Pricing hubs included in the analysis, and within each

region, are identified in the map below. REC price data were compiled by Berkeley Lab based

on information provided by Evolution Markets and Spectron.

Note: The pricing nodes represented by an open, rather than closed, bullet do not have complete pricing history back through 2003.

Map of Regions and Wholesale Electricity Price Hubs Used in Analysis

Mid-C

SP-15

NP-15

COB

Mead

Palo Verde

Four Corners

ERCOT

•

Cinergy Hub

•

PJM West

•

Mass Hub

NYISO A

NYISO G

•

Minnesota Hub

Michigan Hub

•

Illinois Hub

•

Entergy

•

NI Hub

Missouri Zone

Iowa Zone

WAUE Interface

DOM Zone

Maine Zone

Northwest

California

Mountain

Texas

Heartland

Great Lakes

East

New England

Southeast

2011 Wind Technologies Market Report

Policy and Market Drivers

The wind energy integration, transmission, and policy sections were written by staff at Berkeley

Lab and Exeter Associates, based on publicly available information.

Future Outlook

This section was written by staff at Berkeley Lab, based largely on publicly available

information.

2011 Wind Technologies Market Report

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eere.energy.gov

wind.energy.gov

DOE/GO-102012-3472 • August 2012

Printed with a renewable-source ink on paper containing at

least 50% wastepaper, including 10% post consumer waste.

Wind Energy Web Sites

U.S. Department of Energy Wind Program

wind.energy.gov

Wind Powering America

www.windpoweringamerica.gov

Lawrence Berkeley National Laboratory

http://eetd.lbl.gov/EA/EMP/re-pubs.html

National Renewable Energy Laboratory

www.nrel.gov/wind

Sandia National Laboratories

www.sandia.gov/wind

Paciﬁc Northwest National Laboratory

www.pnl.gov

Lawrence Livermore National Laboratory

www.llnl.gov

Oak Ridge National Laboratory

www.ornl.gov

Argonne National Laboratory

www.anl.gov

Idaho National Laboratory

www.inl.gov

For more information on

this report, contact:

Ryan Wiser, Lawrence Berkeley National Laboratory

510-486-5474; RHWiser@lbl.gov

Mark Bolinger, Lawrence Berkeley National Laboratory

603-795-4937; [email protected]v

On the Cover

The 3-MW Alstom ECO 100 wind turbine installed at the

National Renewable Energy Laboratory’s National Wind

Technology Center near Boulder, Colorado, is part of a

long-term research and development agreement between

NREL and Alstom.

Photo by Dennis Schroeder, NREL/PIX 18891

Ames Laboratory

www.ameslab.gov

Los Alamos National Laboratory

www.lanl.gov

Savannah River National Laboratory

http://srnl.doe.gov

Brookhaven National Laboratory

www.bnl.gov

American Wind Energy Association

www.awea.org

Database of State Incentives for

Renewables & Eciency

www.dsireusa.org

International Energy Agency – Wind Agreement

www.ieawind.org

National Wind Coordinating Collaborative

www.nationalwind.org

Utility Wind Integration Group