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.
Overview
Key fields
- 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
Resource stack
- 4 resources
PEARSAL2_AGR_A · PEARSAL2_AGR_B
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.
Structured profile
- Operating capacity
- 201.6 MW
EIA May 2026
- Equipment
- 24 Wärtsilä 20V34SG engines
Wärtsilä
- Owner and operator
- South Texas Electric Cooperative
EIA
Units and generators
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 | 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 |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 201.6 MW
- National rank
- #6
- TX rank
- #3
Monthly generation
Download CSVMonthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
ERCOT disclosed dispatch
4 ERCOT market resources · Diesel
Generation
3 mo through May 22, 2026Capacity factor is average output vs. this plant's observed peak.
Output by hourlocal time · 90 days through May 22, 2026
Latest disclosed outputhourly · 2 weeks ending May 22, 2026
Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
ERCOT public disclosuresOperating context
ERCOT market recordsNearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
Drag organizations to explore the network. Select a node to pin its details and available page link.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Owner and EIA registered operator | EIA May 2026 generator inventory | |
| Engine and engineering-equipment supplier | Wärtsilä Pearsall project record | |
| Market resources | PEARSAL2_AGR_A, PEARSAL2_AGR_B, PEARSAL2_AGR_C, PEARSAL2_AGR_D | Linked ERCOT resources. |
| Grid selection | plant:plant-3630 | Canonical asset page /ercot/assets/plant/pearsall. |
Reporting portfolio
| 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 portfolioTimeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
- Generator enters operationEIA-860
EIA-860 lists generator 2 with this operating date.
- Generator enters operationEIA-860
EIA-860 lists generator 3 with this operating date.
- First 17 EIA generators entered serviceEIA May 202...
EIA reports March 2010 for seventeen units.
- Remaining seven EIA generators entered serviceEIA May 202...
EIA reports April 2010 for seven units.
- Planned generator retirementEIA-860
EIA-860 lists a planned retirement for generator 1, generator 2, generator 3.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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