Dunstable Solar 1, LLC
Middlesex County, Massachusetts · EIA plant ID 64696 · Operator: AES Distributed Energy
Nameplate9MWSummer 9 MW
Generators2in service
Net generation8GWh12 mo to Dec 2025
Capacity factor21%solar units, summer MW
Heat rate—thermal plants only
First online2021
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) |
|---|---|---|---|
| 2021 | 4.4 | 15.1% | — |
| 2022 | 10.5 | 26.9% | — |
| 2023 | 10.5 | 26.5% | — |
| 2024 | 10.8 | 27.7% | — |
| 2025 | 8.4 | 21.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| DUBLN | Batteries | BA | 4.5 | 4.5 | Apr 2021 | Operating | — | coming soon |
| DUNST | Solar Photovoltaic | PV | 4.5 | 4.5 | Apr 2021 | Operating | — | coming soon |
Owner / operator
Operator: AES Distributed Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| AES Distributed Energy | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Pepperell Hydro Power Plant | 2 MW | 4.8 km |
| Tyngsborough Solar | 3 MW | 5.8 km |
| Blodgett Solar CSG | 10 MW | 6 km |
| Groton BESS 1 | 2 MW | 6.5 km |
| Nashua Plant | 2 MW | 7.4 km |
| Groton BESS 2 | 2 MW | 7.5 km |