| Table 4.14. Fuel-Switching Capacity of Operable Generators Reporting Natural Gas as the Primary Fuel, |
| by Year of Initial Commercial Operation, 2025 (Megawatts, Percent) |
| Year of Initial Commercial Operation | Number of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids | Net Summer Capacity of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids |
Fuel Switchable Net Summer Capacity Reported to Have No Factors that Limit the Ability to Switch to Petroleum Liquids |
|---|---|---|---|
| Pre-1970 | 218 | 9,006.9 | 3,501.9 |
| 1970-1974 | 201 | 10,658.2 | 3,735.9 |
| 1975-1979 | 83 | 9,890.3 | 3,969.1 |
| 1980-1984 | 43 | 1,050.5 | 205.6 |
| 1985-1989 | 71 | 2,121.5 | 180.3 |
| 1990-1994 | 173 | 10,727.1 | 1,299.0 |
| 1995-1999 | 117 | 8,699.2 | 946.9 |
| 2000-2004 | 384 | 37,489.8 | 5,384.0 |
| 2005-2009 | 120 | 16,078.9 | 2,123.4 |
| 2010-2014 | 99 | 11,462.4 | 243.3 |
| 2015-2019 | 68 | 9,387.4 | 2,678.8 |
| 2020-2024 | 29 | 3,193.3 | 2,180.8 |
| 2025 | 23 | 699.2 | 3.6 |
| Total | 1,629 | 130,464.6 | 26,452.5 |
| Notes: Petroleum liquids include distillate fuel oil (all diesel and No. 1, No. 2, and No. 4 fuel oils), residual fuel oil (No. 5 and No. 6 fuel oils and bunker C fuel oil), jet fuel, kerosene, waste oil, and propane. Source: U.S. Energy Information Administration, Form EIA-860, "Annual Electric Generator Report." |