Prospero Solar II
Andrews County, Texas · EIA plant ID 64325 · Operator: Prospero Solar II, LLC (Longroad)
Nameplate250MWSummer 250 MW
Generators1in service
Net generation670GWh12 mo to Aug 2026
Capacity factor31%solar units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 199 | 21.7% | — |
| 2022 | 554.7 | 25.3% | — |
| 2023 | 672.1 | 30.7% | — |
| 2024 | 680.6 | 31.0% | — |
| 2025 | 667 | 30.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PROSP | Solar Photovoltaic | PV | 250 | 250 | Aug 2021 | Operating | — | coming soon |
Owner / operator
Operator: Prospero Solar II, LLC (Longroad). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Prospero Solar II, LLC (Longroad) | 100.0% | 250 MW |
Nearby plants
Within 80 km.
| Prospero Solar | 300 MW | 1.4 km |
| Frankel | 9 MW | 13.1 km |
| Alira | — | 14 km |
| Jumbo Hill Wind Project | 161 MW | 15.7 km |
| Lapetus | 100 MW | 26.1 km |
| Tumbleweed | 9 MW | 28.3 km |