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