Castle Gap Solar Hybrid
Upton County, Texas · EIA plant ID 60123 · Operator: Upton County Solar 2 LLC
Nameplate190MWSummer 190 MW
Generators2in service
Net generation352GWh12 mo to Aug 2026
Capacity factor22%solar units, summer MW
Heat rate—thermal plants only
First online2018
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) |
|---|---|---|---|
| 2018 | 300.2 | 28.4% | — |
| 2019 | 432.2 | 27.6% | — |
| 2020 | 408.1 | 26.7% | — |
| 2021 | 427.6 | 28.0% | — |
| 2022 | 451.2 | 29.1% | — |
| 2023 | 396.2 | 25.2% | — |
| 2024 | 396.1 | 25.1% | — |
| 2025 | 384.2 | 24.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| BAT1 | Batteries | BA | 9.9 | 9.9 | Jun 2019 | Operating | — | coming soon |
| CGAP | Solar Photovoltaic | PV | 180 | 180 | May 2018 | Operating | — | coming soon |
Owner / operator
Operator: Upton County Solar 2 LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Upton County Solar 2 LLC | 100.0% | 190 MW |
Nearby plants
Within 80 km.
| Upton County Solar | 150 MW | 2.3 km |
| CED Crane Solar | 150 MW | 3.8 km |
| Revolution | 150 MW | 4.2 km |
| Upton County BESS | 25 MW | 5 km |
| King Mountain Wind Ranch 1 | 278 MW | 5.9 km |
| Mendoza Trail BESS | 200 MW | 8 km |