Electric Power Monthly
| Table 6.07.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 | ||||
| 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% |
| 2023 | 11,225.7 | 6.6% | 23,132.1 | 10.9% |
| 2024 | 19,470.3 | 7.5% | 23,201.5 | 11.3% |
| Year 2023 | ||||
| January | 9,168.7 | 6.9% | 23,057.8 | 9.2% |
| February | 9,236.4 | 6.5% | 23,057.8 | 9.6% |
| March | 9,318.4 | 7.0% | 23,137.8 | 9.2% |
| April | 9,621.5 | 7.2% | 23,147.4 | 8.8% |
| May | 9,791.5 | 6.5% | 23,147.4 | 10.9% |
| June | 9,943.1 | 6.4% | 23,147.4 | 13.8% |
| July | 10,846.6 | 6.5% | 23,147.4 | 15.7% |
| August | 12,332.2 | 6.4% | 23,147.4 | 15.5% |
| Sept | 12,815.4 | 6.3% | 23,147.4 | 13.3% |
| October | 13,515.9 | 7.0% | 23,147.4 | 8.7% |
| November | 13,768.3 | 6.7% | 23,147.4 | 8.3% |
| December | 14,197.9 | 6.3% | 23,147.4 | 8.0% |
| Year 2024 | ||||
| January | 15,731.4 | 5.4% | 23,141.6 | 9.5% |
| February | 15,894.9 | 6.4% | 23,141.6 | 9.7% |
| March | 15,930.8 | 6.9% | 23,221.6 | 7.4% |
| April | 16,971.2 | 7.3% | 23,221.6 | 9.1% |
| May | 17,656.5 | 6.9% | 23,221.6 | 12.5% |
| June | 18,804.3 | 7.1% | 23,221.6 | 15.5% |
| July | 20,040.9 | 7.9% | 23,221.6 | 16.7% |
| August | 20,790.7 | 8.2% | 23,221.6 | 16.3% |
| Sept | 21,715.2 | 7.5% | 23,221.6 | 12.9% |
| October | 22,660.1 | 8.4% | 23,221.6 | 8.3% |
| November | 23,384.2 | 8.3% | 23,179.6 | 8.7% |
| December | 23,929.4 | 8.0% | 23,179.6 | 9.3% |
| Year 2025 | ||||
| January | 26,487.8 | 7.9% | 23,168.4 | 9.7% |
| February | 26,775.5 | 7.9% | 23,156.6 | 10.4% |
| Values for 2023 and prior years are final. Values for 2024 and 2025 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. 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.' |