West Brookfield Solar - Gilbertsville Rd CSG
Worcester County, Massachusetts · EIA plant ID 61629 · Operator: Nautilus Solar Solutions
Nameplate4MWSummer 4 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2017
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) |
|---|---|---|---|
| 2017 | 3.2 | 15.4% | — |
| 2018 | 5.6 | 16.0% | — |
| 2019 | 5.6 | 16.0% | — |
| 2020 | 6.5 | 18.4% | — |
| 2021 | 6.2 | 17.7% | — |
| 2022 | 6.7 | 19.0% | — |
| 2023 | 6 | 17.1% | — |
| 2024 | 5.7 | 16.2% | — |
| 2025 | 5.5 | 15.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| WB | Solar Photovoltaic | PV | 4 | 4 | Jun 2017 | Operating | — | coming soon |
Owner / operator
Operator: Nautilus Solar Solutions. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Nautilus Solar Solutions | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Hardwick-Athol & Eagle Hill | 3 MW | 4.3 km |
| ZPD-PT Solar Project 2017-006 LLC Hybrid | 7 MW | 4.7 km |
| Rose Solar | 4 MW | 4.8 km |
| Ware Palmer Road Solar LLC CSG | 5 MW | 6 km |
| Town of Ware - Canadian Tree(CSG) | 1 MW | 7.1 km |
| Belchertown Renewables Community Solar | 4 MW | 8 km |