Topaz Generating

CPS EnergyGalveston CountyERCOT

Topaz Generating is a ten-unit simple-cycle natural-gas peaking plant in Galveston County, Texas. EIA's May 2026 inventory reports 605 MW nameplate, 445 MW net summer, and 498 MW net winter capability. Seven units entered service in July 2021 and three in July through September 2021. CPS Energy acquired Topaz from PROENERGY in September 2025 as part of a four-plant, 1,632 MW portfolio transaction; CPS reports a 480 MW company rating for Topaz and PROENERGY continues plant staffing and operations-and-maintenance services.