Graphite Solar I
Carbon County, Utah · EIA plant ID 64186 · Operator: Greenbacker Renewable Energy Corporation
Nameplate80MWSummer 80 MW
Generators1in service
Net generation164GWh12 mo to Aug 2026
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2022
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) |
|---|---|---|---|
| 2022 | 108.4 | 26.4% | — |
| 2023 | 197.3 | 28.1% | — |
| 2024 | 193.1 | 27.5% | — |
| 2025 | 188.1 | 26.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 394 | Solar Photovoltaic | PV | 80 | 80 | Jun 2022 | Operating | — | coming soon |
Owner / operator
Operator: Greenbacker Renewable Energy Corporation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Greenbacker Renewable Energy Corporation | 100.0% | 80 MW |
Nearby plants
Within 80 km.
| Sunnyside Cogen Associates | 58 MW | 27.5 km |
| Castle Solar, LLC | 40 MW | 33.7 km |
| Huntington | 1,016 MW | 36.6 km |
| Hornshadow Solar, LLC | 100 MW | 46.6 km |
| Hornshadow Solar II, LLC | 200 MW | 46.6 km |
| Hunter | 1,472 MW | 49.7 km |