Charlton Solar I CSG
Worcester County, Massachusetts · EIA plant ID 59636 · Operator: Charlton Solar I, LLC
Nameplate4MWSummer 4 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor15%solar units, summer MW
Heat rate—thermal plants only
First online2014
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) |
|---|---|---|---|
| 2015 | 5.6 | 16.4% | — |
| 2016 | 6 | 17.5% | — |
| 2017 | 5.4 | 15.9% | — |
| 2018 | 2.8 | 8.1% | — |
| 2019 | 5.5 | 16.1% | — |
| 2020 | 5.5 | 16.1% | — |
| 2021 | 5 | 14.7% | — |
| 2022 | 5.7 | 16.6% | — |
| 2023 | 5.5 | 16.0% | — |
| 2024 | 5.4 | 15.8% | — |
| 2025 | 5.3 | 15.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 37021 | Solar Photovoltaic | PV | 4 | 3.9 | Dec 2014 | Operating | — | coming soon |
Owner / operator
Operator: Charlton Solar I, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Charlton Solar I, LLC | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Griffin Road Solar 2 | 1 MW | 2.1 km |
| Griffin Road Solar, LLC CSG | 2 MW | 2.2 km |
| Millennium Power | 428 MW | 2.3 km |
| St. Joseph's Solar, LLC CSG | 1 MW | 2.7 km |
| Incom Solar, LLC CSG | 2 MW | 2.8 km |
| Depot Hill Solar CSG | 2 MW | 2.9 km |