Kenmare - Mansfield Branch Street
Bristol County, Massachusetts · EIA plant ID 64137 · Operator: GSRP
Nameplate2MWSummer 2 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor18%solar units, summer MW
Heat rate—thermal plants only
First online2017
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) |
|---|---|---|---|
| 2020 | 1.8 | 13.4% | — |
| 2021 | 2.2 | 16.5% | — |
| 2022 | 2.2 | 17.1% | — |
| 2023 | 2.3 | 17.3% | — |
| 2024 | 2.4 | 17.9% | — |
| 2025 | 2.3 | 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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Solar Photovoltaic | PV | 1.5 | 1.5 | Jun 2017 | Operating | — | coming soon |
Owner / operator
Operator: GSRP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Branch Street Solar Partners, LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Norton LLC | 3 MW | 3.8 km |
| Norton | 1 MW | 6.1 km |
| DG Foxborough Elm CSG | 2 MW | 6.8 km |
| Maple(CSG) | 6 MW | 7.3 km |
| Town of Foxborough - Landfill (SREC II) CSG | 1 MW | 7.4 km |
| Norton Landfill Solar | 2 MW | 7.6 km |