Ennis Power Company LLC
Vistra · Ellis County · ERCOT
Ennis Power Company is a two-generator natural-gas combined-cycle plant in Ellis County, Texas. EIA's May 2026 inventory reports 418 MW nameplate, 359.5 MW net summer, and 392.9 MW net winter capability across one combustion turbine and one steam turbine, both dated May 2002. The EIA record identifies Ennis Power Company LLC as the registered operator.
Overview
Key fields
- Net summer capacity
- 359.5 MW
EIA May 2026
- Nameplate capacity
- 418 MW
EIA May 2026
- Net winter capacity
- 392.9 MW
EIA May 2026
- Operating generators
- 2
1 combustion · 1 steam
- Registry anchor
- Plant 55223
Ennis Power Company LLC
Resource stack
- 2 resources
ETCCS_CC1_1 · ETCCS_CC1_2
Profile
- Grid role
- Dispatchable combined-cycle generation in ERCOT.
- Operating configuration
- One 285 MW combustion turbine and one 133 MW steam turbine.
- Registered operator
- Ennis Power Company LLC.
Structured profile
- Net summer capacity
- 359.5 MW
EIA May 2026
- Registered operator
- Ennis Power Company LLC
EIA May 2026
- Operating date
- May 2002
EIA May 2026
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| GT1 | 285 MW 245.1 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | May 2002 | Operating |
| ST1 | 133 MW 114.4 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | May 2002 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 418 MW
- National rank
- #324
- TX rank
- #54
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
2 ERCOT market resources · Combined-cycle gas
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
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Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Project company and EIA registered operator | Ennis Power Company LLC | EIA May 2026 generator inventory |
| Market resources | ETCCS_CC1_1, ETCCS_CC1_2 | Linked ERCOT resources. |
| Grid selection | plant:plant-55223 | Canonical asset page /ercot/assets/plant/ennis-power-company-llc. |
Reporting portfolio
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generating units entered serviceEIA May 202...
EIA reports May 2002 for both current generator records.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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