Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Topaz Generating | Brotman Power Station |
|---|---|---|
| Capacity | 605 MW | 484 MW |
| Technology | Natural Gas Fired Combustion Turbine | Natural Gas Fired Combustion Turbine |
| Operator | City of San Antonio - (TX) | ProEnergy Services |
| Operating units | 10 | 8 |
| Latest 12-month generation | 550.1 GWh | 242.9 GWh |
| Latest complete-year capacity factor | 11.3% (2025) | 7.0% (2025) |
| National technology rank | #61 of 825 | #93 of 825 |
| Latest EIA report | 2026-06 | 2026-06 |