Electric Power Monthly

Data for November 2015  |  Release Date: January 26, 2016  |  Next Release: February 26, 2016 
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SAS Output
Table 6.7.B. Capacity Factors for Utility Scale Generators Not Primarily Using Fossil Fuels, January 2013-November 2015

Period Nuclear Conventional Hydropower Wind Solar Photovoltaic Solar Thermal Landfill Gas and Muncipal Solid Waste Other Biomass Including Wood Geothermal
Annual Factors
2013 89.9% 38.9% 32.4% NA NA 68.9% 56.7% 73.6%
2014 91.7% 37.3% 34.0% 25.9% 19.8% 68.9% 58.9% 74.0%
Year 2013
January 93.9% 42.3% 33.5% NA NA 66.0% 56.5% 76.9%
February 90.3% 38.3% 35.4% NA NA 65.2% 56.0% 76.1%
March 83.4% 34.8% 35.9% NA NA 69.0% 55.4% 76.8%
April 77.6% 44.4% 41.1% NA NA 66.9% 44.8% 73.3%
May 83.3% 48.4% 37.0% NA NA 70.4% 50.5% 71.7%
June 93.1% 48.3% 32.4% NA NA 71.0% 54.8% 72.4%
July 95.6% 46.8% 25.3% NA NA 71.1% 58.2% 73.3%
August 96.7% 37.2% 22.0% NA NA 71.9% 64.8% 72.5%
Sept 92.2% 29.9% 27.4% NA NA 69.4% 61.1% 73.6%
October 85.7% 29.2% 31.0% NA NA 66.6% 57.9% 74.7%
November 91.0% 31.1% 37.0% NA NA 69.5% 61.0% 68.8%
December 96.6% 35.9% 31.3% NA NA 69.9% 59.0% 73.0%
Year 2014
January 99.1% 36.7% 40.3% NA NA 68.1% 60.0% 74.0%
February 94.0% 32.6% 34.8% NA NA 68.3% 59.5% 73.3%
March 84.5% 40.7% 39.8% NA NA 69.6% 59.7% 73.5%
April 78.8% 44.5% 43.2% NA NA 69.9% 49.5% 74.6%
May 85.2% 44.6% 34.9% NA NA 70.6% 48.2% 73.2%
June 95.4% 44.8% 36.5% NA NA 70.8% 63.0% 73.4%
July 97.5% 41.3% 27.0% NA NA 73.1% 63.4% 72.5%
August 96.4% 33.7% 22.5% 30.9% 25.4% 71.1% 62.8% 73.0%
Sept 94.6% 28.2% 26.1% 30.7% 26.3% 68.9% 61.2% 74.2%
October 84.5% 29.2% 31.6% 26.5% 21.1% 64.4% 56.5% 73.9%
November 91.3% 32.6% 42.3% 22.3% 13.8% 66.1% 62.1% 77.3%
December 99.6% 37.8% 30.4% 15.1% 5.6% 65.4% 60.8% 75.5%
Year 2015
January 101.3% 41.5% 31.7% 19.7% 5.1% 67.4% 54.1% 73.7%
February 95.8% 42.5% 34.4% 26.2% 15.9% 62.2% 57.3% 74.2%
March 88.0% 41.8% 31.7% 30.5% 24.2% 59.0% 49.4% 75.0%
April 84.2% 39.3% 37.8% 34.3% 32.5% 65.5% 40.7% 70.6%
May 89.8% 34.1% 35.2% 34.0% 31.1% 67.3% 46.9% 74.4%
June 96.4% 35.0% 28.3% 34.4% 34.5% 69.6% 53.1% 72.3%
July 97.2% 35.5% 27.7% 33.9% 35.1% 70.8% 58.5% 72.7%
August 98.6% 33.0% 26.0% 33.7% 32.8% 70.2% 59.8% 72.1%
Sept 93.5% 28.4% 28.2% 29.2% 27.5% 65.2% 50.8% 65.9%
October 82.5% 28.1% 31.9% 25.5% 16.7% 65.9% 45.5% 69.8%
November 84.8% 33.4% 39.1% 23.5% 17.1% 69.9% 49.0% 72.3%

Values for 2014 and prior years are final. Values for 2015 are preliminary. NA = Not Available
Notes: Solar Thermal Capacity Factors include generation from plants using concentrated solar power energy storage.
Sources: U.S. Energy Information Administration, Form EIA-923, Power Plant Operations Report; U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report' and Form EIA-860M, 'Monthly Update to the Annual Electric Generator Report.'