Southwick Solar PV
Hampden County, Massachusetts · EIA plant ID 62082 · Operator: NSTAR Electric Company
Nameplate5MWSummer 5 MW
Generators1in service
Net generation8GWh12 mo to Aug 2026
Capacity factor18%solar units, summer MW
Heat rate—thermal plants only
First online2019
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) |
|---|---|---|---|
| 2018 | 0 | — | — |
| 2019 | 7.4 | 16.9% | — |
| 2020 | 8.3 | 19.0% | — |
| 2021 | 8.4 | 19.1% | — |
| 2022 | 9.4 | 21.5% | — |
| 2023 | 8.3 | 19.0% | — |
| 2024 | 8.5 | 19.4% | — |
| 2025 | 7.9 | 17.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| REC34 | Solar Photovoltaic | PV | 5 | 5 | Jan 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% | 5 MW |
Nearby plants
Within 80 km.
| Southwick Solar, LLC Community Solar | 5 MW | 1.9 km |
| Kearsarge Southwick LLC | 3 MW | 4.3 km |
| CES Agawam Tuckahoe Solar Hybrid | 6 MW | 5 km |
| Goose Pond Solar | 4 MW | 5.3 km |
| Route 57 Solar | 2 MW | 7.2 km |
| ENGIE 2019 ProjectCo-MA1, LLC | 5 MW | 8 km |