580 River Solar
Worcester County, Massachusetts · EIA plant ID 65085 · Operator: NuGen Capital Management
Nameplate3MWSummer 3 MW
Generators1in service
Net generation4GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2018
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) |
|---|---|---|---|
| 2021 | 4.5 | 16.6% | — |
| 2022 | 4.8 | 17.7% | — |
| 2023 | 4.5 | 16.5% | — |
| 2024 | 4.7 | 17.1% | — |
| 2025 | 4.4 | 16.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | PV | 3.1 | 3.1 | Sep 2018 | Operating | — | coming soon |
Owner / operator
Operator: NuGen Capital Management. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| NuGen Capital Management | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Winchendon Landfill Solar | 2 MW | 1.3 km |
| Winchendon Solar | 2 MW | 7.3 km |
| Happy Hollow CSG Hybrid | 8 MW | 8.6 km |
| Royalston Solar One | — | 9.1 km |
| Gardner - Otter River Road | 3 MW | 9.2 km |
| West Street Solar 1 LLC | 5 MW | 9.9 km |