Southampton Solar PV
Hampshire County, Massachusetts · EIA plant ID 62066 · Operator: NSTAR Electric Company
Nameplate2MWSummer 2 MW
Generators1in service
Net generation3GWh12 mo to Dec 2025
Capacity factor15%solar units, summer MW
Heat rate—thermal plants only
First online2019
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) |
|---|---|---|---|
| 2019 | 2.8 | 17.5% | — |
| 2020 | 3.3 | 18.9% | — |
| 2021 | 3.1 | 17.8% | — |
| 2022 | 3.4 | 19.2% | — |
| 2023 | 2.6 | 14.9% | — |
| 2024 | 3.1 | 17.7% | — |
| 2025 | 2.6 | 14.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| LG400 | Solar Photovoltaic | PV | 2 | 2 | Feb 2019 | 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.
| Holyoke Solar Cooperative at Mueller | 3 MW | 2.5 km |
| GSPP Terrawatt Westfield LLC CSG | 4 MW | 2.9 km |
| CED Westfield Solar, LLC | 2 MW | 4.6 km |
| Easthampton CSG | 3 MW | 5.9 km |
| Holyoke MA BESS 1 | — | 6.2 km |
| Twiss Street Solar | 2 MW | 6.5 km |