Estill Solar
Hampton County, South Carolina · EIA plant ID 61490 · Operator: Estill Solar I, LLC
Nameplate20MWSummer 20 MW
Generators1in service
Net generation23GWh12 mo to Aug 2026
Capacity factor13%solar units, summer MW
Heat rate—thermal plants only
First online2017
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) |
|---|---|---|---|
| 2017 | 1.6 | 10.6% | — |
| 2018 | 21.5 | 12.3% | — |
| 2019 | 39.2 | 22.4% | — |
| 2020 | 39.1 | 22.2% | — |
| 2021 | 39.4 | 22.5% | — |
| 2022 | 38.7 | 22.1% | — |
| 2023 | 34.5 | 19.7% | — |
| 2024 | 31.2 | 17.7% | — |
| 2025 | 23.7 | 13.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EST1 | Solar Photovoltaic | PV | 20 | 20 | Dec 2017 | Operating | — | coming soon |
Owner / operator
Operator: Estill Solar I, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Estill Solar I, LLC | 100.0% | 20 MW |
Nearby plants
Within 80 km.
| Estill Solar II | 10 MW | 4.1 km |
| Hampton Solar I | 7 MW | 16.4 km |
| Hampton Solar 2 | 20 MW | 16.4 km |
| SCE&G Curie CSG | 2 MW | 18.9 km |
| Southern Current One, LLC | 10 MW | 20.5 km |
| Quest Solar | — | 23.7 km |