Mendon
Worcester County, Massachusetts · EIA plant ID 64575 · Operator: BWC Box Pond LLC
Nameplate3MWSummer 3 MW
Generators1in service
Net generation3GWh12 mo to Dec 2025
Capacity factor15%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) |
|---|---|---|---|
| 2020 | 4.1 | 17.7% | — |
| 2021 | 3.8 | 16.9% | — |
| 2022 | 3.8 | 16.8% | — |
| 2023 | 3.9 | 17.3% | — |
| 2024 | 3.8 | 16.7% | — |
| 2025 | 3.4 | 15.1% | — |
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 | 2.6 | 2.6 | Dec 2017 | Operating | — | coming soon |
Owner / operator
Operator: BWC Box Pond LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| BWC Box Pond LLC | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| BWC Muddy Brook, LLC Hybrid | 2 MW | 0.3 km |
| BWC Origination 19 | 1 MW | 1.5 km |
| Bellingham Cogeneration Facility | 386 MW | 1.6 km |
| Kearsarge William Way | 7 MW | 1.9 km |
| BWC Wading River One, Two, Three CSG | 3 MW | 2.5 km |
| Milford Power LP | 249 MW | 3.6 km |