# T H Wharton

ERCOT asset profile · https://askthegrid.com/assets/facilities/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.

## 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.

## Metrics

- **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

## Facts

- **Legacy owner / operator:** NRG Texas Power LLC — EIA, TCEQ, and EPA records · confidence: high
- **New-unit permit holder:** NRG THW GT LLC — TCEQ Federal Operating Permit O4712 · confidence: high
- **TEF loan:** Up to $216M — 20 years · 3% · maximum 60% of project cost · confidence: high
- **Interconnection request:** 24INR0482 — THW_GT61 and THW_GT62 · confidence: high

## Related parties

- **Owner / operator:** NRG Energy — Owner / operator for T H Wharton ([source](https://nrg.com/))

## Sources

- [ERCOT September 2026 MORA](https://www.ercot.com/files/docs/2026/07/02/MORA_September2026.pdf) — Electric Reliability Council of Texas · regulatory — Current 19-resource configuration, installed ratings, summer capability, and 2026 interconnection request.
- [Texas Energy Fund loan announcement](https://gov.texas.gov/news/post/governor-abbott-announces-texas-energy-fund-loan-to-456-mw-natural-gas-facility-in-houston) — Office of the Texas Governor · regulatory — Loan amount, term, interest rate, project-cost cap, capacity, and Houston location.
- [TCEQ new-unit operating permit](https://www.tceq.texas.gov/assets/public/permitting/air/publicnotice/37517sop.pdf) — Texas Commission on Environmental Quality · regulatory — NRG THW GT LLC, RN100542885, and Federal Operating Permit O4712.

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Canonical page: https://askthegrid.com/assets/facilities/t-h-wharton
Website: [NRG Energy](https://nrg.com/)
Profile published: 2026-07-17T03:34:52.345Z
Source: Ask the Grid — https://askthegrid.com/