Southington Solar One
Hartford County, Connecticut · EIA plant ID 65668 · Operator: dg connecticut iii, llc
Nameplate5MWSummer 5 MW
Generators1in service
Net generation9GWh12 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) |
|---|---|---|---|
| 2021 | 0 | — | — |
| 2022 | 7.9 | 21.1% | — |
| 2023 | 8.7 | 21.2% | — |
| 2024 | 8.8 | 21.4% | — |
| 2025 | 9.1 | 22.0% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EWS1 | Solar Photovoltaic | PV | 4.7 | 4.7 | Feb 2022 | Operating | — | coming soon |
Owner / operator
Operator: dg connecticut iii, llc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| dg connecticut iii, llc | 100.0% | 5 MW |
Nearby plants
Within 80 km.
| East Windsor Solar One | 5 MW | 0 km |
| East Windsor Solar Two | 4 MW | 1.3 km |
| Norcap North | 2 MW | 2.3 km |
| Norcap South | 2 MW | 2.4 km |
| Gravel Pit Solar, LLC | 120 MW | 2.6 km |
| East Windsor | 4 MW | 5.2 km |