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U.S. wind capacity factors – 2011 

Author:  | Grid, Technology, U.S.

Source:  Form EIA-923, all wind energy facilities that submitted annual reports for ALL of 2011.

Note that these are idealized figures, representing self-reports of only working turbines (i.e., not accounting for downtime for maintenance, repair, or accident). Nevertheless, according to the WIA’s annual data reports and averaging the installed capacities at the ends of 2010 and 2011, the overall capacity factor in the U.S. in 2011 was 32.1% rather than 32.0% as reported here. The difference likely varies by state.

Click here to download consolidated and optimized Excel spreadsheet of data for the 576 reporting facilities.

0.160 NJ
0.177 MA
0.206 VT
0.222 AZ
0.222 RI
0.225 TN
0.228 OH
0.237 UT
0.238 NY
0.254 CA
0.254 OR
0.262 WV
0.266 MI
0.273 PA
0.275 DE
0.276 ME
0.280 IN
0.286 WI
0.293 MO
0.296 IL
0.301 WA
0.303 CO
0.314 NH
0.316 AK
0.322 ID
0.324 MD
0.326 IA
0.338 MN
0.341 NM
0.342 TX
0.371 WY
0.376 MT
0.381 NE
0.386 ND
0.391 SD
0.393 KS
0.409 OK
0.522 HI

0.320 US TOTAL

  Northeast

New England

MA 0.177
ME 0.276
NH 0.314
RI 0.222
VT 0.206

Middle Atlantic

NJ 0.160
NY 0.238
PA 0.273

South

South Atlantic

DE 0.275
MD 0.324
WV 0.262

East South Central

TN 0.225

West South Central

OK 0.409
TX 0.342

Midwest

East North Central

IL 0.296
IN 0.280
MI 0.266
OH 0.228
WI 0.286

West North Central

IA 0.326
KS 0.393
MN 0.338
MO 0.293
ND 0.386
NE 0.381
SD 0.391

West

Mountain

AZ 0.222
CO 0.303
ID 0.322
MT 0.376
NM 0.341
UT 0.237
WY 0.371

Pacific

AK 0.316
CA 0.254
HI 0.522
OR 0.254
WA 0.301

Click here for the U.S. wind capacity factors for 2012.

This material is the work of the author(s) indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this material resides with the author(s). As part of its noncommercial educational effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Queries e-mail.

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