Orion III Solar Project
Milam County, Texas · EIA plant ID 66821 · Operator: Ben Milam Solar 3 LLC
Nameplate250MWSummer 250 MW
Generators1in service
Net generation537GWh12 mo to Aug 2026
Capacity factor25%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 | 234.8 | 25.6% | — |
| 2025 | 551.8 | 25.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| ORN3 | Solar Photovoltaic | PV | 250 | 250 | Aug 2024 | Operating | — | coming soon |
Owner / operator
Operator: Ben Milam Solar 3 LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Ben Milam Solar 3 LLC | 100.0% | 250 MW |
Nearby plants
Within 80 km.
| Hermes Storage BESS | — | 3 km |
| OCI Stillhouse Solar | 210 MW | 4 km |
| Hermes Solar PV | — | 4.1 km |
| BT Jungmann | 40 MW | 8.9 km |
| Sypert Branch Solar | — | 11.3 km |
| Orion I Solar Project | 200 MW | 12.4 km |