Mariposa Solar Center LLC
Gaston County, North Carolina · EIA plant ID 59162 · Operator: Heelstone Energy Holdings, LLC
Nameplate5MWSummer 5 MW
Generators1in service
Net generation8GWh12 mo to Dec 2025
Capacity factor19%solar units, summer MW
Heat rate—thermal plants only
First online2016
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) |
|---|---|---|---|
| 2016 | 2.2 | 14.8% | — |
| 2017 | 9.7 | 22.2% | — |
| 2018 | 9.3 | 21.2% | — |
| 2019 | 9.2 | 20.9% | — |
| 2020 | 8.5 | 19.3% | — |
| 2021 | 8.9 | 20.4% | — |
| 2022 | 8.9 | 20.2% | — |
| 2023 | 9.1 | 20.8% | — |
| 2024 | 8.9 | 20.2% | — |
| 2025 | 8.5 | 19.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| MSC 1 | Solar Photovoltaic | PV | 5 | 5 | Sep 2016 | Operating | — | coming soon |
Owner / operator
Operator: Heelstone Energy Holdings, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Heelstone Energy Holdings, LLC | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| Hornet Solar | — | 5.5 km |
| Gaston Solar Power Plant | 25 MW | 7.2 km |
| Gaston County Renewable Energy Center | 4 MW | 7.8 km |
| Lincoln Combustion | 2,156 MW | 8 km |
| Long Creek Waste Water Plant | 5 MW | 8.5 km |
| Auten Road Farm, LLC | 5 MW | 8.9 km |