| Table 4.08.C. Usage Factors for Utility Scale Storage Generators |
| Battery | Pumped Storage | |||
|---|---|---|---|---|
| Year/Month | Time Adjusted Capacity (MW) | Usage Factor | Time Adjusted Capacity (MW) | Usage Factor |
| Annual Data | ||||
| 2013 | 126.7 | 0.7% | 22,389.3 | 9.8% |
| 2014 | 155.1 | 1.7% | 22,477.9 | 10.2% |
| 2015 | 206.8 | 3.6% | 22,568.9 | 10.2% |
| 2016 | 423.0 | 3.8% | 22,752.7 | 11.2% |
| 2017 | 632.8 | 6.8% | 22,791.7 | 11.4% |
| 2018 | 713.6 | 5.2% | 22,815.4 | 10.8% |
| 2019 | 949.8 | 5.4% | 22,754.7 | 10.4% |
| 2020 | 1,210.3 | 5.2% | 22,939.6 | 10.5% |
| 2021 | 2,627.6 | 6.1% | 23,007.7 | 10.2% |
| 2022 | 6,566.1 | 6.4% | 23,033.9 | 11.1% |
| Year 2020 | ||||
| January | 1,023.4 | 5.3% | 22,917.9 | 9.0% |
| February | 1,038.8 | 5.7% | 22,917.9 | 9.1% |
| March | 1,052.5 | 6.3% | 22,917.9 | 7.9% |
| April | 1,077.2 | 5.6% | 22,917.9 | 8.2% |
| May | 1,093.1 | 5.3% | 22,917.9 | 10.8% |
| June | 1,106.9 | 5.4% | 22,917.9 | 13.4% |
| July | 1,110.5 | 5.3% | 22,917.9 | 15.9% |
| August | 1,363.8 | 4.7% | 22,917.9 | 15.0% |
| September | 1,395.5 | 5.0% | 22,917.9 | 11.6% |
| October | 1,395.5 | 4.8% | 22,997.9 | 8.4% |
| November | 1,419.8 | 5.0% | 22,997.9 | 7.6% |
| December | 1,440.6 | 4.6% | 23,016.2 | 8.6% |
| Year 2021 | ||||
| January | 1,505.6 | 4.2% | 23,007.7 | 8.1% |
| February | 1,640.0 | 5.6% | 23,007.7 | 9.0% |
| March | 1,653.0 | 5.5% | 23,007.7 | 7.4% |
| April | 1,780.4 | 5.1% | 23,007.7 | 7.2% |
| May | 1,958.8 | 6.1% | 23,007.7 | 8.7% |
| June | 2,499.4 | 6.4% | 23,007.7 | 12.4% |
| July | 2,777.0 | 6.5% | 23,007.7 | 15.2% |
| August | 3,043.5 | 7.4% | 23,007.7 | 15.9% |
| September | 3,110.9 | 7.1% | 23,007.7 | 12.8% |
| October | 3,304.5 | 6.0% | 23,007.7 | 9.7% |
| November | 3,765.6 | 6.2% | 23,007.7 | 7.7% |
| December | 4,418.2 | 5.8% | 23,007.7 | 8.6% |
| Year 2022 | ||||
| January | 4,926.4 | 5.5% | 23,013.4 | 9.5% |
| February | 4,996.7 | 6.6% | 23,013.4 | 8.9% |
| March | 5,069.2 | 5.7% | 23,013.4 | 9.1% |
| April | 5,316.2 | 6.0% | 23,013.4 | 7.3% |
| May | 6,055.5 | 6.4% | 23,043.9 | 10.9% |
| June | 6,064.5 | 7.1% | 23,043.9 | 14.8% |
| July | 6,555.2 | 6.9% | 23,043.9 | 15.9% |
| August | 6,941.6 | 6.6% | 23,043.9 | 16.4% |
| September | 7,469.9 | 6.1% | 23,043.9 | 13.2% |
| October | 7,958.4 | 6.7% | 23,043.9 | 8.4% |
| November | 8,630.7 | 6.7% | 23,043.9 | 9.2% |
| December | 8,696.4 | 6.5% | 23,043.9 | 9.6% |
| Values are final. 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. Usage factors are a comparison of gross generation with available capacity. See the technical note for an explanation of how usage 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.' |