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Electric Power Monthly

Data for August 2018  |  Release Date: October 24, 2018  |  Next Release: November 27, 2018 
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SAS Output
Table 6.7.B. Capacity Factors for Utility Scale Generators Not Primarily Using Fossil Fuels, January 2013-August 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% 43.1% 34.6% 25.7% 21.8% 68.0% 57.8% 74.0%
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% 45.4% 32.6% 12.7% 7.3% 73.0% 59.7% 75.9%
February 95.0% 44.1% 38.6% 17.2% 11.7% 69.2% 59.9% 75.3%
March 87.8% 49.1% 40.6% 25.1% 22.9% 66.7% 60.7% 74.1%
April 79.1% 51.1% 41.1% 28.4% 24.9% 66.4% 52.3% 75.9%
May 82.7% 54.7% 36.2% 32.5% 31.0% 68.7% 49.9% 70.5%
June 93.4% 52.7% 32.9% 35.9% 37.9% 69.7% 56.7% 68.9%
July 96.2% 45.1% 25.6% 32.7% 25.4% 67.4% 60.4% 74.4%
August 97.7% 37.3% 21.8% 30.4% 27.6% 68.2% 60.8% 73.9%
Sept 94.9% 33.4% 29.5% 29.1% 29.2% 65.7% 55.2% 73.6%
October 89.0% 31.0% 40.2% 26.4% 24.1% 63.8% 54.1% 67.5%
November 92.9% 36.0% 39.1% 19.4% 10.3% 67.8% 59.9% 73.2%
December 99.4% 37.7% 38.0% 17.7% 9.0% 69.6% 63.3% 85.1%
Year 2018
January 100.7% 45.0% 42.5% 18.7% 10.0% 72.1% 58.7% 76.6%
February 96.8% 49.2% 41.9% 22.9% 16.1% 76.7% 57.4% 80.5%
March 90.4% 45.0% 44.0% 26.3% 19.3% 73.2% 52.2% 78.2%
April 82.4% 49.9% 44.9% 31.2% 24.4% 71.6% 43.9% 70.3%
May 90.8% 54.1% 38.8% 31.9% 33.0% 68.9% 48.7% 78.8%
June 97.1% 51.6% 42.1% 34.5% 41.7% 76.5% 54.6% 76.2%
July 97.7% 43.3% 25.4% 31.6% 30.1% 75.6% 51.1% 78.0%
August 97.5% 37.7% 32.0% 31.0% 32.5% 75.3% 49.6% 78.0%

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