Westford Solar Park
Middlesex County, Massachusetts · EIA plant ID 58534 · Operator: GSRP
Nameplate4MWSummer 4 MW
Generators1in service
Net generation4GWh12 mo to Dec 2025
Capacity factor12%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 | 3.6 | 13.6% | — |
| 2013 | 5.8 | 16.7% | — |
| 2014 | 5.5 | 15.6% | — |
| 2015 | 5.4 | 15.3% | — |
| 2016 | 5.9 | 16.9% | — |
| 2017 | 5.4 | 15.4% | — |
| 2018 | 5.1 | 14.7% | — |
| 2019 | 5.2 | 14.8% | — |
| 2020 | 5.3 | 15.2% | — |
| 2021 | 5.1 | 14.5% | — |
| 2022 | 5.1 | 14.6% | — |
| 2023 | 4.4 | 12.7% | — |
| 2024 | 4.6 | 13.2% | — |
| 2025 | 4.1 | 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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Solar Photovoltaic | PV | 4 | 4 | Apr 2012 | 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).
| Westford Solar Park | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| BWC Stony Brook, LLC Hybrid | 2 MW | 1.3 km |
| Tyngsborough Solar | 3 MW | 4.3 km |
| Blodgett Solar CSG | 10 MW | 5.2 km |
| Lowell Solar Landfill | 1 MW | 6.5 km |
| Boott Hydropower | 23 MW | 8.1 km |
| Dunstable Solar 1, LLC | 9 MW | 8.6 km |