Lee Site 31 Solar
Berkshire County, Massachusetts · EIA plant ID 62265 · Operator: NSTAR Electric Company
Nameplate2MWSummer 2 MW
Generators1in service
Net generation0GWh12 mo to Dec 2025
Capacity factor1%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 | 0.4 | 6.0% | — |
| 2019 | 2.1 | 12.9% | — |
| 2020 | 2.7 | 15.9% | — |
| 2021 | 2.5 | 14.8% | — |
| 2022 | 2.5 | 15.0% | — |
| 2023 | 2.3 | 13.9% | — |
| 2024 | 0.3 | 1.8% | — |
| 2025 | 0.1 | 0.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| LG370 | Solar Photovoltaic | PV | 1.9 | 1.9 | Aug 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% | 2 MW |
Nearby plants
Within 80 km.
| Woodland Road | retired | 4.4 km |
| Monument Valley | 3 MW | 9.9 km |
| Glendale Hydroelectric Project | 1 MW | 10.2 km |
| Tanglewood Circle Solar 1 LLC | 5 MW | 10.9 km |
| Rising Paper | 3 MW | 12.3 km |
| Waste Water Treatment Plant | 2 MW | 12.6 km |