Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Hays Energy Project | Guadalupe Generating Station |
|---|---|---|
| Capacity | 989 MW | 1,088.2 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combined Cycle |
| Operator | Hays Energy, LLC | Guadalupe Power Partners LP |
| Operating units | 4 | 6 |
| Latest 12-month generation | 5.53 TWh | 5.31 TWh |
| Latest complete-year capacity factor | 61.6% (2025) | 59.9% (2025) |
| National technology rank | #97 of 538 | #82 of 538 |
| Latest EIA report | 2026-06 | 2026-06 |