GulfStar Power, LLC
Wharton County, Texas · EIA plant ID 66871 · Operator: GulfStar Power, LLC
452 MW under construction (Solar Photovoltaic), first expected Oct 2026 · EIA-860M
Nameplate300MWSummer 300 MW
Generators1in service · 452 MW building
Net generation896GWh12 mo to Aug 2026
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2025
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2025 | 822.8 | — | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| BESS | Batteries | BA | 300 | 300 | Jun 2025 | Operating | — | coming soon |
| SOLAR | Solar Photovoltaic | PV | 451.6 | 451.6 | planned Oct 2026 | Under construction | — | coming soon |
Owner / operator
Operator: GulfStar Power, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| GulfStar Power, LLC | 100.0% | 300 MW |
Nearby plants
Within 80 km.
| Pledger | — | 5.4 km |
| Erin | — | 5.4 km |
| Cascade Solar (TX) | 10 MW | 5.6 km |
| Lane City Wind | 203 MW | 6.4 km |
| OCI SunRoper | — | 6.9 km |
| Newgulf Cogen | 102 MW | 10.4 km |