T H Wharton
NRG Energy · Houston, Harris County · ERCOT
T H Wharton is NRG's natural-gas generating complex in Houston. The current ERCOT rows total 1,751.7 MW of installed capacity and 1,399.2 MW of summer capability. EIA's May 2026 inventory still covers only the 17 legacy units and reports 1,002 MW of net summer capability, so the two capacity records have different scopes and dates.
Overview
Key fields
- Current summer capability
- 1,399.2 MW
ERCOT September 2026 · 19 resources
- Current installed capacity
- 1,751.7 MW
ERCOT September 2026
- Legacy EIA summer
- 1,002 MW
May 2026 · excludes the two new peakers
- TEF addition
- 455.6 MW
408 MW summer · THW_GT61 / THW_GT62
- 12-month legacy generation
- 702,359 MWh
May 2025–Apr 2026 · before new-unit COD
- Registry anchor
- Plant 3469
NRG Texas Power LLC · ERCOT
Resource stack
- 25 resources
THW_CC1_1 · THW_CC1_2
Profile
- Current ERCOT fleet
- 19 resources: 17 legacy units plus THW_GT61 and THW_GT62. September 2026 ratings total 1,751.7 MW installed and 1,399.2 MW summer capability.
- Legacy configuration
- Two 4-on-1 combined-cycle blocks use eight combustion turbines, eight HRSGs, and two steam turbines; seven additional legacy turbines operate in simple cycle.
- Environmental record
- TCEQ Regulated Entity RN100542885; legacy Federal Operating Permit O77, new-unit permit O4712, and wastewater permit WQ0001039000.
Structured profile
- Legacy owner / operator
- NRG Texas Power LLC
EIA, TCEQ, and EPA records
- New-unit permit holder
- NRG THW GT LLC
TCEQ Federal Operating Permit O4712
- TEF loan
- Up to $216M
20 years · 3% · maximum 60% of project cost
- Interconnection request
- 24INR0482
THW_GT61 and THW_GT62
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 3 | 113.1 MW 110 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Aug 1974 Retirement: Dec 2035 | Operating |
| 31 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 32 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 33 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 34 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 4 | 113.1 MW 110 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CA | Aug 1974 Retirement: Dec 2035 | Operating |
| 41 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 42 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Jul 1972 Retirement: Dec 2035 | Operating |
| 43 | 56.7 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Aug 1974 Retirement: Dec 2035 | Operating |
| 44 | 56.7 MW 54 MW summer | Natural Gas Fired Combined Cycle Natural Gas · CT | Aug 1974 Retirement: Dec 2035 | Operating |
| 51 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| 52 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| 53 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| 54 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| 55 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| 56 | 85 MW 56 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Nov 1975 Retirement: Dec 2035 | Operating |
| GT1 | 16.3 MW 14 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jul 1967 Retirement: Dec 2035 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 663.6 MW
- National rank
- #203
- TX rank
- #31
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
25 ERCOT market resources · Combined-cycle gas, Gas turbine
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 / operator | Owner / operator for T H Wharton | |
| Market resources | THW_CC1_1, THW_CC1_2, THW_CC1_3, THW_CC1_4, THW_CC1_5 | 25 linked ERCOT resources. |
| Grid selection | plant:plant-3469 | Canonical asset page /ercot/assets/plant/t-h-wharton. |
Reporting portfolio
| Largest reported plants | Capacity | State |
|---|---|---|
| W A Parish | 4,008.4 MW | TX |
| Limestone | 1,849.8 MW | TX |
| Cedar Bayou | 1,530 MW | TX |
| T H WhartonCurrent | 1,189.9 MW | TX |
| Greens Bayou | 432 MW | TX |
| San Jacinto Steam Electric Station | 176.4 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 GT1 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 31, generator 32, generator 33, generator 34, generator 41, generator 42 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 3, generator 4, generator 43, generator 44 with this operating date.
- Generators enter operationEIA-860
EIA-860 lists generator 51, generator 52, generator 53, generator 54, generator 55, generator 56 with this operating date.
- Texas Energy Fund loan executedOffice of t...
The PUCT agreed to a 20-year loan of up to $216 million at 3%, capped at 60% of project cost.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
- Planned generator retirementEIA-860
EIA-860 lists a planned retirement for generator 3, generator 31, generator 32, generator 33, generator 34, generator 4, generator 41, generator 42, generator 43, generator 44, generator 51, generator 52, generator 53, generator 54, generator 55, generator 56, generator GT1.
Sources
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