Prospero Solar
Andrews County, Texas · EIA plant ID 62755 · Operator: Prospero Energy Project, LLC (Longroad)
Nameplate300MWSummer 300 MW
Generators1in service
Net generation690GWh12 mo to Aug 2026
Capacity factor26%solar units, summer MW
Heat rate—thermal plants only
First online2020
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) |
|---|---|---|---|
| 2020 | 385.1 | 25.0% | — |
| 2021 | 656.6 | 25.0% | — |
| 2022 | 630.9 | 24.0% | — |
| 2023 | 712.2 | 27.1% | — |
| 2024 | 752.7 | 28.6% | — |
| 2025 | 759.4 | 28.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PROSP | Solar Photovoltaic | PV | 300 | 300 | Jun 2020 | Operating | — | coming soon |
Owner / operator
Operator: Prospero Energy Project, LLC (Longroad). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Prospero Energy Project, LLC (Longroad) | 100.0% | 300 MW |
Nearby plants
Within 80 km.
| Prospero Solar II | 250 MW | 1.4 km |
| Frankel | 9 MW | 11.7 km |
| Alira | — | 13.7 km |
| Jumbo Hill Wind Project | 161 MW | 14.9 km |
| Lapetus | 100 MW | 24.8 km |
| Tumbleweed | 9 MW | 27.5 km |