Plymouth Solar
Plymouth County, Massachusetts · EIA plant ID 62266 · Operator: NSTAR Electric Company
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 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) |
|---|---|---|---|
| 2018 | 0.8 | 13.5% | — |
| 2019 | 1.6 | 16.5% | — |
| 2020 | 1.6 | 16.7% | — |
| 2021 | 1.6 | 16.4% | — |
| 2022 | 1.7 | 17.1% | — |
| 2023 | 1.5 | 15.4% | — |
| 2024 | 1.5 | 15.2% | — |
| 2025 | 1.5 | 16.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| LG400 | Solar Photovoltaic | PV | 1.1 | 1.1 | Jun 2018 | Operating | — | coming soon |
Owner / operator
Operator: NSTAR Electric Company. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| NSTAR Electric Company | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| Raboth - Marion Drive | 4 MW | 3.9 km |
| New Bedford (MA) Plymouth | 4 MW | 4.1 km |
| Kingston Wind Independence | retired | 4.2 km |
| Camelot Wind LLC | 2 MW | 4.7 km |
| Big George PV CSG | 1 MW | 5.5 km |
| Carver MA 1 Community Solar | 2 MW | 6 km |