Electric Power Monthly

Data for October 2017  |  Release Date: December 22, 2017  |  Next Release: January 24, 2018 
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SAS Output
Table 6.7.B. Capacity Factors for Utility Scale Generators Not Primarily Using Fossil Fuels, January 2013-October 2017

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%
2015 92.3% 35.8% 32.2% 25.8% 22.1% 68.7% 55.3% 74.3%
2016 92.3% 38.2% 34.5% 25.1% 22.2% 69.7% 55.6% 73.9%
Year 2015
January 101.3% 40.7% 31.2% 16.8% 5.0% 65.1% 57.2% 75.9%
February 95.8% 41.4% 34.1% 22.1% 14.5% 64.3% 60.0% 76.4%
March 88.0% 40.8% 31.4% 26.7% 22.6% 63.0% 53.4% 76.8%
April 84.3% 39.4% 37.5% 30.9% 30.5% 66.8% 47.3% 72.4%
May 89.8% 33.9% 34.8% 31.2% 27.0% 68.5% 48.4% 76.6%
June 96.4% 35.8% 27.9% 31.7% 32.2% 69.2% 56.7% 74.1%
July 97.3% 35.8% 27.4% 31.4% 31.1% 73.1% 59.9% 74.7%
August 98.6% 32.5% 25.8% 31.3% 32.3% 71.5% 61.6% 73.9%
Sept 93.6% 28.3% 28.1% 26.6% 27.1% 68.8% 56.1% 67.9%
October 82.5% 28.3% 31.6% 22.8% 16.5% 68.3% 48.8% 72.4%
November 84.8% 33.8% 39.0% 20.7% 16.9% 72.4% 55.8% 75.4%
December 94.9% 39.4% 37.4% 17.5% 9.5% 73.0% 58.3% 75.3%
Year 2016
January 98.5% 43.6% 33.9% 15.2% 6.8% 68.3% 58.5% 73.4%
February 95.3% 43.8% 39.6% 22.9% 19.5% 67.6% 61.2% 73.2%
March 89.9% 45.9% 40.2% 24.9% 19.6% 67.2% 55.8% 72.5%
April 88.1% 44.6% 39.3% 27.2% 20.9% 69.3% 45.8% 68.8%
May 90.5% 42.8% 34.2% 30.2% 28.9% 72.9% 47.0% 73.9%
June 94.2% 40.6% 30.5% 30.3% 33.5% 72.0% 54.7% 71.2%
July 94.5% 36.1% 31.9% 31.7% 36.9% 70.9% 59.3% 72.2%
August 96.1% 33.0% 24.5% 31.7% 29.2% 70.3% 63.5% 73.0%
Sept 90.9% 28.6% 30.4% 28.5% 30.2% 67.9% 58.5% 75.5%
October 81.7% 29.3% 36.4% 24.0% 19.1% 63.8% 48.9% 74.6%
November 90.9% 32.8% 35.3% 20.4% 14.4% 72.6% 54.9% 77.7%
December 96.7% 37.9% 38.8% 16.2% 7.0% 73.4% 59.6% 80.1%
Year 2017
January 98.7% 48.4% 36.5% 16.8% 7.3% 75.4% 49.4% 79.7%
February 95.7% 47.8% 42.4% 19.8% 11.7% 71.6% 55.5% 77.9%
March 87.9% 54.1% 44.6% 27.8% 22.9% 67.7% 51.8% 74.9%
April 79.2% 53.9% 45.0% 31.0% 24.9% 67.9% 51.2% 78.6%
May 82.8% 56.8% 38.8% 34.1% 31.0% 70.6% 47.0% 74.0%
June 93.5% 57.1% 34.4% 35.7% 37.9% 72.6% 49.1% 75.2%
July 96.3% 46.1% 27.6% 33.7% 25.4% 71.3% 51.0% 78.0%
August 97.7% 37.9% 22.4% 31.2% 27.6% 72.7% 49.0% 77.4%
Sept 94.9% 34.7% 31.5% 29.6% 29.2% 69.3% 48.2% 77.8%
October 89.1% 30.2% 41.6% 26.6% 24.1% 67.0% 52.4% 69.3%

Values for 2016 and prior years are final. Values for 2017 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.'