Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Guadalupe Generating Station | O W Sommers |
|---|---|---|
| Capacity | 1,088.2 MW | 892 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Steam Turbine |
| Operator | Guadalupe Power Partners LP | City of San Antonio - (TX) |
| Operating units | 6 | 2 |
| Latest 12-month generation | 5.31 TWh | 2.53 TWh |
| Latest complete-year capacity factor | 59.9% (2025) | 32.3% (2024) |
| National technology rank | #82 of 538 | #33 of 257 |
| Latest EIA report | 2026-06 | 2024-12 |