Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Green Power 2 | Topaz Generating |
|---|---|---|
| Capacity | 611 MW | 605 MW |
| Technology | Natural Gas Fired Combined Cycle | Natural Gas Fired Combustion Turbine |
| Operator | South Houston Green Power LLC | City of San Antonio - (TX) |
| Operating units | 5 | 10 |
| Latest 12-month generation | 4.13 TWh | 550.1 GWh |
| Latest complete-year capacity factor | 72.1% (2025) | 11.3% (2025) |
| National technology rank | #127 of 538 | #61 of 825 |
| Latest EIA report | 2026-06 | 2026-06 |