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.
EIA May 2026
Wärtsilä
Wärtsilä 20V34SG
Wärtsilä
ERCOT settlement point.
EIA May 2026
South Texas Electric Cooperative
PEARSAL2_AGR_A · PEARSAL2_AGR_B
EIA May 2026
Wärtsilä
EIA
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 22 MW 23 MW summer | Natural Gas Steam Turbine Natural Gas · ST | May 1961 Retirement: Aug 2017 | Operating |
| 10A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 11A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 12A | 8.4 MW 8.4 MW summer |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Project milestones and public references behind the asset profile.
EIA-860 lists generator 1 with this operating date.
Natural Gas Internal Combustion Engine Natural Gas · IC |
| Mar 2010 |
| Operating |
| 13A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 14A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 15A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 16A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 17A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 18A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 19A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 1A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 2 | 22 MW 23 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Jul 1961 Retirement: Aug 2017 | Operating |
| 20A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 21A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 22A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 23A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 24A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Apr 2010 | Operating |
| 2A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 3 | 22 MW 23 MW summer | Natural Gas Steam Turbine Natural Gas · ST | Sep 1961 Retirement: Aug 2017 | Operating |
| 3A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 4A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 5A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 6A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 7A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 8A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
| 9A | 8.4 MW 8.4 MW summer | Natural Gas Internal Combustion Engine Natural Gas · IC | Mar 2010 | Operating |
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
4 ERCOT market resources · Diesel
Capacity factor is average output vs. this plant's observed peak.
Observed ERCOT settlement prices at PEARSA_1_24 over 363 days (2025-09-11 to 2026-09-10).
The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Red Gate Power Plant | 224.4 MW | TX | |
| PearsallCurrent | 201.6 MW | TX | |
| Sam Rayburn | 192.8 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator 2 with this operating date.
EIA-860 lists generator 3 with this operating date.
EIA reports March 2010 for seventeen units.
EIA reports April 2010 for seven units.
EIA-860 lists a planned retirement for generator 1, generator 2, generator 3.
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Pearsall has a reported capacity of 201.6 MW. Source: EIA Form 860.
Pearsall is a Natural Gas Internal Combustion Engine facility in Frio County, TX, participating in the ERCOT market.
Pearsall is in Frio County, TX, inside the ERCOT balancing area.
Pearsall is operated by South Texas Electric Coop, Inc according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Pearsall reported 329.9 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
Pearsall settles at PEARSA_1_24.
By capacity, Pearsall ranks #6 of 398 operating plants of the same technology nationally. It ranks #3 of 149 in TX.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
