# Pearsall

ERCOT asset profile · https://askthegrid.com/assets/facilities/pearsall

South Texas Electric Cooperative · Frio County · ERCOT

Pearsall is a 201.6 MW natural-gas internal-combustion plant in Frio County, Texas, owned and operated by South Texas Electric Cooperative. EIA's May 2026 inventory lists 24 operating 8.4 MW generators, with service months in March and April 2010. Wärtsilä identifies the installation as 24 20V34SG gas engines with a 203 MW company rating, delivered in 2009. The supplier reports full output in eight minutes, black-start capability and reserve-service capability.

## Profile

- **Grid role:** Fast-start gas-engine generation providing energy and ancillary services.
- **EIA configuration:** 24 operating generators · 8.4 MW each · 201.6 MW total.
- **Supplier configuration:** 24 Wärtsilä 20V34SG engines · 203 MW company rating.
- **Operating capability:** Full plant output in eight minutes with black-start and reserve capability.

## Metrics

- **Operating capacity:** 201.6 MW — EIA May 2026
- **Company rating:** 203 MW — Wärtsilä
- **Gas engines:** 24 — Wärtsilä 20V34SG
- **Full-output time:** 8 minutes — Wärtsilä
- **Settlement point:** PEARSA_1_24 — ERCOT settlement point.
- **Commercial operation:** Mar–Apr 2010 — EIA May 2026
- **Registry anchor:** Plant 3630 — South Texas Electric Cooperative

## Facts

- **Operating capacity:** 201.6 MW — EIA May 2026 · confidence: high
- **Equipment:** 24 Wärtsilä 20V34SG engines — Wärtsilä · confidence: high
- **Owner and operator:** South Texas Electric Cooperative — EIA · confidence: high

## Related parties

- **Owner and EIA registered operator:** South Texas Electric Cooperative — EIA May 2026 generator inventory ([source](https://www.stec.org/))
- **Engine and engineering-equipment supplier:** Wärtsilä — Wärtsilä Pearsall project record ([source](https://www.wartsila.com/))

## 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.
- [Wärtsilä Pearsall project record](https://www.wartsila.com/usa/energy/pearsall-station-tx-usa) — Wärtsilä · official — Equipment count and model, supplier rating, delivery and operating capabilities.

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Canonical page: https://askthegrid.com/assets/facilities/pearsall
Website: [STEC](https://www.wartsila.com/usa/energy/pearsall-station-tx-usa)
Profile published: 2026-07-17T03:34:40.042Z
Source: Ask the Grid — https://askthegrid.com/