Dartmouth
Bristol County, Massachusetts · EIA plant ID 58682 · Operator: Mass Solar, LLC
Nameplate6MWSummer 6 MW
Generators1in service
Net generation6GWh12 mo to Dec 2025
Capacity factor12%solar units, summer MW
Heat rate—thermal plants only
First online2014
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) |
|---|---|---|---|
| 2014 | 7.5 | 17.9% | — |
| 2015 | 9.5 | 17.2% | — |
| 2016 | 9.5 | 17.1% | — |
| 2017 | 8.8 | 15.9% | — |
| 2018 | 8.3 | 15.0% | — |
| 2019 | 9 | 16.2% | — |
| 2020 | 9.2 | 16.7% | — |
| 2021 | 9.2 | 16.7% | — |
| 2022 | 4.9 | 8.9% | — |
| 2023 | 8.5 | 15.4% | — |
| 2024 | 7.9 | 14.2% | — |
| 2025 | 6.4 | 11.6% | — |
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 | 6.3 | 6.3 | Apr 2014 | Operating | — | coming soon |
Owner / operator
Operator: Mass Solar, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Mass Solar, LLC | 100.0% | 6 MW |
Nearby plants
Within 80 km.
| Dartmouth Power Associates LP | 97 MW | 0.4 km |
| Faunce Corner Community Solar | 2 MW | 0.7 km |
| Ventura | 2 MW | 0.9 km |
| Dartmouth Farms Solar | 4 MW | 1.6 km |
| Dartmouth II Solar | 2 MW | 2.9 km |
| Acushnet Hawes Reed Road | 1 MW | 4.1 km |