# Topaz Generating

ERCOT asset profile · https://askthegrid.com/assets/facilities/topaz-generating

CPS Energy · Galveston County · ERCOT

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.

## Profile

- **Grid role:** Ten fast-start simple-cycle natural-gas peaking turbines in ERCOT's Houston Zone.
- **Operating configuration:** Ten EIA generator records at 60.5 MW nameplate each.
- **Capacity scope:** EIA reports 605 MW nameplate, 445 MW net summer, and 498 MW net winter capability; CPS uses a 480 MW company rating.
- **Current ownership and operation:** CPS Energy acquired Topaz in September 2025; PROENERGY continues staffing and O&M services.

## Metrics

- **Net summer capacity:** 445 MW — EIA May 2026
- **Nameplate capacity:** 605 MW — EIA May 2026
- **Net winter capacity:** 498 MW — EIA May 2026
- **Company rating:** 480 MW — CPS Energy
- **Operating generators:** 10 — Simple-cycle peaking turbines
- **Registry anchor:** Plant 63688 — City of San Antonio

## Facts

- **Net summer capacity:** 445 MW — EIA May 2026 · confidence: high
- **Nameplate capacity:** 605 MW — EIA May 2026 · confidence: high
- **Current owner:** CPS Energy — Acquired September 2025 · confidence: high
- **O&M provider:** PROENERGY — Post-sale services · confidence: high
- **Company rating:** 480 MW — CPS Energy · confidence: high

## Sources

- [EIA May 2026 generator inventory](https://www.eia.gov/electricity/data/eia860m/) — U.S. Energy Information Administration · regulatory — Current generator records, capacity scopes, dates, status, operator, and technology.
- [PROENERGY Topaz sale closing](https://www.proenergyservices.com/2025/09/proenergy-closes-agreement-with-cps-energy-to-divest-ho-clarke-topaz-mark-one-and-remy-jade-generating-stations/) — PROENERGY Services · official — Closing date, buyer, seller, portfolio transaction scope, and continuing O&M services.

---

Canonical page: https://askthegrid.com/assets/facilities/topaz-generating
Website: [CPS Energy](https://www.cpsenergy.com/)
Profile published: 2026-07-17T03:34:54.149Z
Source: Ask the Grid — https://askthegrid.com/