Town of Norfolk MA at Medway Branch
Norfolk County, Massachusetts · EIA plant ID 57942 · Operator: Constellation Solar Massachusetts LLC
Nameplate1MWSummer 1 MW
Generators1in service
Net generation2GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2012
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) |
|---|---|---|---|
| 2012 | 0.9 | 15.3% | — |
| 2013 | 2 | 19.0% | — |
| 2014 | 1.9 | 18.2% | — |
| 2015 | 1.9 | 18.0% | — |
| 2016 | 2 | 19.3% | — |
| 2017 | 1.9 | 18.3% | — |
| 2018 | 1.9 | 18.1% | — |
| 2019 | 2 | 18.6% | — |
| 2020 | 2 | 19.0% | — |
| 2021 | 1.9 | 17.8% | — |
| 2022 | 1.9 | 17.7% | — |
| 2023 | 1.9 | 17.6% | — |
| 2024 | 1.9 | 17.7% | — |
| 2025 | 1.7 | 15.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | PV | 1.2 | 1.2 | Jun 2012 | Operating | — | coming soon |
Owner / operator
Operator: Constellation Solar Massachusetts LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Constellation Solar Massachusetts LLC | 100.0% | 1 MW |
Nearby plants
Within 80 km.
| 15 Lincoln | 2 MW | 3.2 km |
| Millis MA 1 | 1 MW | 4.9 km |
| Dynamic - Walpole | 2 MW | 5.7 km |
| Walpole Solar 2 | 2 MW | 6.3 km |
| Bird Machine Solar Farm | 4 MW | 6.4 km |
| One Patriot | 2 MW | 7.3 km |