Mars Solar
Webb County, Texas · EIA plant ID 63027 · Operator: Sol Systems
Nameplate10MWSummer 10 MW
Generators1in service
Net generation20GWh12 mo to Dec 2025
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2019
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) |
|---|---|---|---|
| 2019 | 6.8 | 18.5% | — |
| 2020 | 21.9 | 24.9% | — |
| 2021 | 24.7 | 28.2% | — |
| 2022 | 20.2 | 23.1% | — |
| 2023 | 23 | 26.3% | — |
| 2024 | 20.5 | 23.4% | — |
| 2025 | 20.4 | 23.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 20 | Solar Photovoltaic | PV | 10 | 10 | Aug 2019 | Operating | — | coming soon |
Owner / operator
Operator: Sol Systems. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sol Systems | 100.0% | 10 MW |
Nearby plants
Within 80 km.
| Javelina Wind Energy II, LLC | 200 MW | 7.7 km |
| Whitetail | 92 MW | 18.4 km |
| Cedro Hill Wind LLC | 300 MW | 18.5 km |
| Javelina Wind Energy, LLC | 250 MW | 19.8 km |
| Torrecillas Wind Energy, LLC | 300 MW | 21.8 km |
| Torrecillas Energy Storage | — | 22 km |