Old Frontier Solar III
Franklin County, Massachusetts · EIA plant ID 68069 · Operator: Old Frontier Solar III PV, LLC
Nameplate4MWSummer 4 MW
Generators2in service
Net generation4GWh12 mo to Dec 2025
Capacity factor22%solar units, summer MW
Heat rate—thermal plants only
First online2022
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) |
|---|---|---|---|
| 2024 | 4.1 | 23.4% | — |
| 2025 | 3.8 | 21.9% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 16501 | Solar Photovoltaic | PV | 2 | 2 | Sep 2022 | Operating | — | coming soon |
| 16502 | Batteries | BA | 2 | 2 | Sep 2022 | Operating | — | coming soon |
Owner / operator
Operator: Old Frontier Solar III PV, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Old Frontier Solar III PV, LLC | 100.0% | 4 MW |
Nearby plants
Within 80 km.
| Fairview Farms Solar | 2 MW | 3.9 km |
| Whately Solar | 2 MW | 5.3 km |
| Whatley Renewables | 1 MW | 5.6 km |
| Long Plain Solar | 2 MW | 5.8 km |
| Deerfield CSG Solar | 5 MW | 8.1 km |
| Axio Green LLC | 2 MW | 9.2 km |