Starr Solar Ranch
Starr County, Texas · EIA plant ID 65975 · Operator: Lightsource Renewable Energy Asset Management, LLC
180 MW planned (Batteries), first expected Dec 2031 · EIA-860M
Nameplate136MWSummer 136 MW
Generators1in service
Net generation269GWh12 mo to Aug 2026
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2024
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), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
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) |
|---|---|---|---|
| 2024 | 21.1 | 10.6% | — |
| 2025 | 272.2 | 22.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| TXST1 | Solar Photovoltaic | PV | 136 | 136 | Nov 2024 | Operating | — | coming soon |
| TXSD2 | Batteries | BA | 180 | 180 | planned Dec 2031 | Planned | — | coming soon |
Owner / operator
Operator: Lightsource Renewable Energy Asset Management, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Starr Solar Ranch LLC | 100.0% | 136 MW |
Nearby plants
Within 80 km.
| Rio Bravo Windpower, LLC | 238 MW | 14.1 km |
| SMT Rio Grande I LLC | 10 MW | 15 km |
| Falcon Dam & Power | 32 MW | 15.1 km |
| Las Lomas Wind Project | 202 MW | 19.9 km |
| Lopeno | 10 MW | 20.4 km |
| Rio Grande City BESS 2 | 10 MW | 24.5 km |