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Electric Power Monthly

Data for July 2018  |  Release Date: September 25, 2018  |  Next Release: October 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-July 2018

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%
2017 92.2% 45.2% 36.7% 27.0% 21.8% 70.9% 50.7% 76.4%
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% 36.6% 16.8% 7.3% 75.4% 49.3% 79.7%
February 94.9% 47.8% 42.5% 19.8% 11.7% 71.6% 55.5% 77.9%
March 87.8% 54.1% 44.6% 27.8% 22.9% 67.7% 51.8% 74.9%
April 79.1% 53.9% 44.9% 31.0% 24.9% 67.9% 51.2% 78.6%
May 82.7% 56.8% 38.7% 34.1% 31.0% 70.6% 47.0% 74.0%
June 93.4% 57.1% 34.5% 35.7% 37.9% 72.6% 49.1% 75.2%
July 96.2% 46.2% 27.5% 33.7% 25.4% 71.3% 51.0% 78.0%
August 97.6% 37.9% 22.3% 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 89.0% 30.2% 41.6% 26.6% 24.1% 67.0% 52.4% 69.3%
November 92.9% 35.3% 39.4% 20.1% 10.3% 71.1% 51.5% 76.6%
December 99.4% 40.0% 37.2% 17.4% 9.0% 73.3% 52.7% 77.4%
Year 2018
January 100.7% 44.9% 42.5% 18.7% 10.0% 72.1% 54.9% 76.4%
February 96.8% 48.8% 41.9% 22.8% 16.1% 76.5% 57.2% 80.6%
March 90.4% 44.8% 44.0% 26.2% 19.3% 72.8% 52.3% 78.4%
April 82.4% 49.7% 44.9% 31.2% 24.4% 71.6% 43.9% 70.5%
May 90.8% 53.9% 38.6% 31.9% 33.0% 68.9% 48.4% 79.0%
June 97.1% 51.4% 41.8% 34.5% 41.7% 76.5% 54.4% 76.4%
July 97.7% 43.3% 25.2% 31.6% 30.1% 75.6% 51.1% 78.0%

Values for 2016 and prior years are final. Values for 2017 and 2018 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.'