U.S. Energy Information Administration logo

Electric Power Monthly

Data for August 2019  |  Release date: October 24, 2019     Next release: November 26, 2019  |
full report

Previous Issues

SAS Output
Table 6.07.B. Capacity Factors for Utility Scale Generators Primarily Using Non-Fossil Fuels

  Geothermal Hydroelectric Nuclear Other Biomass Other Gas Solar Wind Wood
Year/Month   Photovoltaic Thermal  
  Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor Time Adjusted Capacity Capacity Factor
Annual Data
2009 2,278.0 73.0% 78,500.4 39.6% 101,003.7 90.3% 4,183.9 65.0% 1,752.2 43.4% 81.9 20.0% 468.2 23.6% 28,996.9 28.1% 6,936.4 61.7%
2010 2,392.1 71.6% 78,810.3 37.5% 101,167.4 91.1% 4,298.7 64.2% 1,929.0 50.5% 206.8 20.2% 473.0 24.5% 35,702.6 29.7% 6,991.5 61.5%
2011 2,407.9 71.5% 78,564.7 45.8% 101,265.1 89.1% 4,469.8 64.2% 1,902.7 54.1% 537.0 19.0% 485.3 23.9% 42,019.2 32.1% 7,000.3 59.6%
2012 2,531.8 68.3% 78,296.6 39.6% 101,166.0 86.6% 4,639.7 63.3% 1,802.8 59.6% 1,527.1 20.4% 476.0 23.6% 49,458.0 31.8% 7,089.1 61.3%
2013 2,509.5 71.8% 78,873.5 38.8% 99,006.8 90.8% 4,949.7 62.3% 2,171.6 55.9% 3,525.2 24.5% 552.1 17.4% 59,175.6 32.4% 7,887.9 59.0%
2014 2,513.3 72.0% 79,582.8 37.2% 98,569.3 91.7% 5,114.6 62.7% 1,994.0 54.0% 6,555.6 25.6% 1,445.3 18.3% 60,587.8 34.0% 8,319.7 60.0%
2015 2,523.0 71.9% 79,650.8 35.7% 98,614.6 92.3% 5,104.5 62.6% 2,527.7 60.8% 9,521.6 25.5% 1,697.3 21.7% 67,106.2 32.2% 9,024.5 59.3%
2016 2,516.6 71.6% 79,806.0 38.2% 99,364.8 92.3% 5,099.5 62.7% 2,458.8 64.8% 14,161.4 25.0% 1,757.9 22.1% 74,162.7 34.5% 8,979.8 58.3%
2017 2,460.4 73.2% 79,698.8 43.0% 99,619.5 92.3% 5,125.6 61.8% 2,375.8 62.8% 21,940.9 25.6% 1,757.9 21.8% 83,355.6 34.6% 8,807.5 60.2%
2018 2,391.5 76.0% 79,771.9 41.9% 99,605.2 92.5% 5,059.0 61.8% 2,543.9 65.4% 27,143.3 25.1% 1,757.9 23.6% 89,228.5 34.6% 8,760.2 60.6%
Year 2017
January 2,511.1 73.6% 79,657.2 45.2% 99,609.9 98.7% 5,095.1 65.5% 2,375.8 63.8% 20,249.8 12.6% 1,757.9 7.3% 81,337.2 32.6% 8,748.6 61.4%
February 2,511.1 73.0% 79,657.2 44.2% 99,609.9 95.0% 5,097.3 63.0% 2,375.8 65.3% 20,603.7 17.2% 1,757.9 11.6% 81,713.0 38.6% 8,748.6 61.6%
March 2,451.1 73.6% 79,657.2 49.4% 99,609.9 87.8% 5,097.3 61.2% 2,375.8 64.9% 20,792.6 25.0% 1,757.9 22.9% 81,962.1 40.6% 8,741.6 60.0%
April 2,451.1 75.4% 79,660.1 51.2% 99,609.9 79.2% 5,105.7 60.4% 2,375.8 61.8% 21,177.9 28.2% 1,757.9 24.8% 83,041.4 41.1% 8,789.1 56.4%
May 2,451.1 70.0% 79,660.1 54.6% 99,609.9 82.8% 5,122.7 62.8% 2,375.8 58.1% 21,700.6 32.4% 1,757.9 30.9% 83,182.1 36.2% 8,796.6 55.0%
June 2,451.1 68.4% 79,660.1 52.7% 99,609.9 93.5% 5,126.7 62.9% 2,375.8 59.1% 22,006.1 35.8% 1,757.9 37.9% 83,313.5 32.9% 8,802.9 60.6%
July 2,451.1 73.9% 79,667.4 44.6% 99,628.9 96.2% 5,145.2 61.4% 2,375.8 58.9% 22,242.6 32.6% 1,757.9 25.3% 83,498.6 25.6% 8,802.9 62.1%
August 2,451.1 73.4% 79,614.2 36.8% 99,628.9 97.7% 5,147.3 61.6% 2,375.8 65.0% 22,356.4 30.3% 1,757.9 27.5% 83,980.6 21.8% 8,856.4 63.3%
Sept 2,451.1 73.1% 79,761.5 33.2% 99,628.9 95.0% 5,147.2 59.2% 2,375.8 61.8% 22,547.7 29.0% 1,757.9 29.1% 83,980.6 29.5% 8,856.4 58.6%
October 2,451.1 67.0% 79,797.5 30.8% 99,628.9 89.0% 5,147.2 57.9% 2,375.8 62.1% 22,762.8 26.2% 1,757.9 24.1% 84,229.8 40.2% 8,856.4 57.4%
November 2,451.1 72.7% 79,797.1 35.8% 99,628.9 92.9% 5,143.9 62.0% 2,375.8 65.1% 23,095.3 19.3% 1,757.9 10.3% 84,483.3 39.0% 8,856.4 61.2%
December 2,446.3 84.6% 79,794.4 37.7% 99,628.9 99.4% 5,129.5 63.4% 2,375.8 67.4% 23,660.0 17.6% 1,757.9 9.0% 85,431.2 38.0% 8,830.9 65.3%
Year 2018
January 2,387.5 75.3% 79,771.8 42.2% 99,730.6 100.6% 5,108.5 62.2% 2,543.9 66.2% 25,311.1 16.3% 1,757.9 10.0% 87,552.6 38.7% 8,813.0 65.3%
February 2,403.5 78.9% 79,771.8 46.4% 99,730.6 96.7% 5,083.1 64.6% 2,543.9 66.6% 25,968.4 20.9% 1,757.9 16.1% 88,563.2 38.8% 8,813.0 62.5%
March 2,382.2 76.8% 79,785.3 43.6% 99,730.6 90.3% 5,086.1 62.0% 2,543.9 63.3% 26,067.6 24.3% 1,757.9 19.2% 88,787.7 40.0% 8,780.5 61.7%
April 2,392.2 69.0% 79,792.3 48.9% 99,730.6 82.4% 5,086.1 60.9% 2,543.9 61.6% 26,591.3 29.7% 1,757.9 24.4% 88,789.2 41.3% 8,780.5 55.6%
May 2,392.2 77.7% 79,753.3 51.3% 99,730.6 90.7% 5,083.5 59.4% 2,543.9 63.2% 26,859.7 31.8% 1,757.9 32.9% 89,086.2 36.0% 8,761.5 58.0%
June 2,392.2 75.5% 79,753.8 48.1% 99,730.6 97.1% 5,006.9 63.0% 2,543.9 64.1% 27,291.3 34.9% 1,757.9 41.7% 89,078.2 38.4% 8,775.5 61.7%
July 2,392.2 77.0% 79,751.6 42.3% 99,730.6 97.7% 5,050.2 62.3% 2,543.9 65.8% 27,451.7 31.1% 1,757.9 30.1% 89,227.2 24.7% 8,767.2 63.7%
August 2,392.2 76.8% 79,751.6 37.1% 99,730.6 97.4% 5,042.5 62.6% 2,543.9 68.7% 27,590.1 30.5% 1,757.9 32.5% 89,387.5 29.8% 8,748.7 62.2%
Sept 2,392.2 77.1% 79,751.6 33.4% 99,277.9 90.3% 5,042.5 58.3% 2,543.9 67.2% 27,674.0 27.7% 1,757.9 34.8% 89,469.5 28.6% 8,748.7 58.5%
October 2,392.2 71.5% 79,753.6 32.9% 99,277.9 80.4% 5,041.4 61.0% 2,543.9 64.3% 27,989.5 22.4% 1,757.9 20.7% 89,941.8 31.5% 8,748.7 56.5%
November 2,392.2 77.3% 79,753.6 38.1% 99,432.9 89.3% 5,039.0 62.3% 2,543.9 67.4% 28,158.3 17.3% 1,757.9 13.3% 90,282.8 33.8% 8,694.6 60.4%
December 2,387.9 79.4% 79,870.8 38.4% 99,432.9 96.9% 5,038.6 63.2% 2,543.9 67.0% 28,690.2 13.7% 1,757.9 7.0% 90,534.1 34.8% 8,694.6 61.4%
Year 2019
January 2,447.0 77.9% 79,867.1 40.8% 99,431.1 99.6% 5,027.6 59.8% 2,543.9 67.4% 30,151.8 15.5% 1,757.9 8.4% 94,417.7 35.5% 8,647.5 62.7%
February 2,447.0 79.5% 79,880.6 40.7% 99,431.1 96.9% 5,027.6 59.3% 2,543.9 68.9% 30,815.5 17.7% 1,757.9 10.9% 95,314.6 35.9% 8,647.5 62.6%
March 2,447.0 78.8% 79,896.6 43.0% 99,431.1 88.0% 4,993.7 58.1% 2,543.9 64.8% 31,016.3 24.2% 1,757.9 19.8% 95,806.4 36.4% 8,496.8 58.5%
April 2,454.9 70.0% 79,896.6 44.3% 99,586.1 84.5% 4,993.7 56.4% 2,548.9 63.2% 31,234.4 28.7% 1,757.9 25.5% 96,636.4 42.7% 8,573.7 56.3%
May 2,454.9 73.7% 79,876.7 50.6% 98,908.9 90.8% 4,988.1 58.8% 2,548.9 65.6% 31,323.5 29.2% 1,757.9 25.7% 96,638.2 36.0% 8,558.7 59.1%
June 2,454.9 77.0% 79,880.6 46.0% 98,908.9 96.6% 4,970.4 61.0% 2,548.9 66.2% 31,385.7 33.1% 1,757.9 35.5% 96,867.7 32.6% 8,489.2 61.8%
July 2,454.9 77.2% 79,882.1 39.9% 98,908.9 98.1% 4,972.0 60.3% 2,548.9 70.2% 31,698.8 32.6% 1,757.9 31.4% 98,111.8 30.0% 8,518.6 63.7%
August 2,454.9 77.1% 79,778.3 35.0% 98,908.9 97.7% 4,968.1 60.9% 2,548.9 67.1% 31,940.8 31.1% 1,757.9 32.0% 98,387.4 26.9% 8,518.6 66.1%

Values for 2018 and prior years are final. Values for 2019 are preliminary.
Time adjusted capacity for month rows is the summer capacity of generators in operation for the entire month; units that began operation during the month or that retired during the month are excluded. Time adjusted capacity for year rows is a time weighted average of the month rows.
Capacity factors are a comparison of net generation with available capacity. See the technical note for an explanation of how capacity factors are calculated.
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.'