T H Wharton
NRG EnergyHarris County
T H Wharton power plant is NRG’s natural-gas generating complex in Houston, Harris County, Texas, serving the ERCOT market. ERCOT’s September 2026 resource rows total 1,751.7 MW of installed capacity and 1,393.8 MW of summer capability. EIA’s May 2026 inventory covers the 17 legacy units and reports 1,002 MW of net summer capability, so these capacity records have different scopes and dates.
Mapped infrastructure geometry associated with this asset.
EIA, TCEQ, and EPA records
TCEQ Federal Operating Permit O4712
20 years · 3% · maximum 60% of project cost
THW_GT61 and THW_GT62
EIA plant 3469 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 3 | Natural Gas Fired Combined Cycle | Operating | 113.1 | Unknown |
| 31 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
| 32 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
| 33 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
The September 2026 ERCOT resource rows on this page total 1,751.7 MW installed capacity and 1,393.8 MW summer capability across 19 resources. These are fleet totals with a September 2026 basis, rather than ratings for the expansion alone.
Source: ERCOT September 2026 MORA resource details · as of 2026-09
ERCOT’s September 2026 MORA lists THW_GT61 and THW_GT62 at 227.8 MW installed capacity and 204 MW summer capability each. Together they total 455.6 MW installed and 408 MW summer capability.
Source: ERCOT September 2026 MORA resource details · as of 2026-09
Similar plants ranked by technology, capacity, and distance.
Current 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 CA | Aug 1974 | Operating |
| 31 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle CT | Jul 1972 | Operating |
| 32 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle CT | Jul 1972 | Operating |
| 33 | 54 MW 54 MW summer | Natural Gas Fired Combined Cycle CT | Jul 1972 | Operating |
| 34 | 54 MW 54 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.
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Project milestones and public references behind the asset profile.
EIA-860 lists generator GT1 with this operating date.
| 34 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
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| 4 | Natural Gas Fired Combined Cycle | Operating | 113.1 | Unknown |
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| 41 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
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| 42 | Natural Gas Fired Combined Cycle | Operating | 54 | Unknown |
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| 43 | Natural Gas Fired Combined Cycle | Operating | 56.7 | Unknown |
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| 44 | Natural Gas Fired Combined Cycle | Operating | 56.7 | Unknown |
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| 51 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| 52 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| 53 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| 54 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| 55 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| 56 | Natural Gas Fired Combustion Turbine | Operating | 85 | Unknown |
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| GT1 | Natural Gas Fired Combustion Turbine | Operating | 16.3 | Unknown |
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| 2 | Natural Gas Steam Turbine | Retired | 247.8 | Unknown |
|---|
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
17 ERCOT market resources · Combined-cycle gas, Gas turbine
Capacity factor is average output vs. this plant's observed peak.
Observed ERCOT settlement prices at THW_1_CCU over 365 days (2025-10-26 to 2026-10-25). This plant is also crosswalked to THW_2_CCU, THW_CC1, THW_THWGT5X, THW_THWGT_1; the point with the deepest price history is shown.
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 | |
|---|---|---|---|
| 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 portfolioEIA-860 lists generator 31, generator 32, generator 33, generator 34, generator 41, generator 42 with this operating date.
EIA-860 lists generator 3, generator 4, generator 43, generator 44 with this operating date.
EIA-860 lists generator 51, generator 52, generator 53, generator 54, generator 55, generator 56 with this operating date.
The PUCT agreed to a 20-year loan of up to $216 million at 3%, capped at 60% of project cost.
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.
The September 2026 ERCOT resource rows on this page total 1,751.7 MW installed capacity and 1,393.8 MW summer capability across 19 resources. These are fleet totals with a September 2026 basis, rather than ratings for the expansion alone.
ERCOT’s September 2026 MORA lists THW_GT61 and THW_GT62 at 227.8 MW installed capacity and 204 MW summer capability each. Together they total 455.6 MW installed and 408 MW summer capability.
T H Wharton reports 1,189.9 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
T H Wharton is a Natural Gas Fired Combined Cycle; Natural Gas Fired Combustion Turbine; facility in Harris County, TX, participating in the ERCOT market.
T H Wharton is in Harris County, TX, inside the ERCOT balancing area.
T H Wharton is operated by NRG Texas Power LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
T H Wharton reported 583.3 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, T H Wharton ranks #204 of 540 operating plants of the same technology nationally. It ranks #31 of 68 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.
