Nextsun Energy Littleton
Middlesex County, Massachusetts · EIA plant ID 62842 · Operator: Greenbacker Renewable Energy Corporation
Nameplate4MWSummer 4 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor15%solar units, summer MW
Heat rate—thermal plants only
First online2013
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) |
|---|---|---|---|
| 2019 | 5.8 | 16.5% | — |
| 2020 | 6 | 17.0% | — |
| 2021 | 5.4 | 16.1% | — |
| 2022 | 5.8 | 17.5% | — |
| 2023 | 5.2 | 15.6% | — |
| 2024 | 5.3 | 16.0% | — |
| 2025 | 5.1 | 15.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1-003 | Solar Photovoltaic | PV | 3.8 | 3.8 | Oct 2013 | Operating | — | coming soon |
Owner / operator
Operator: Greenbacker Renewable Energy Corporation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Greenbacker Renewable Energy Corporation | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| GSPP Devens, LLC | 2 MW | 6.3 km |
| Groton BESS 1 | 2 MW | 6.8 km |
| MDFA Devens-Saratoga | 3 MW | 7.3 km |
| GSPP Boxborough Littleton (MA) | 4 MW | 7.7 km |
| Groton BESS 2 | 2 MW | 9 km |
| Acton-Boxborough Schools BESS | 2 MW | 9.1 km |