AEUG Union Solar, LLC
Union County, Ohio · EIA plant ID 64660 · Operator: Acciona Energy USA Global, LLC
Nameplate325MWSummer 325 MW
Generators1in service
Net generation654GWh12 mo to Aug 2026
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2024
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 42.6 | 9.0% | — |
| 2025 | 657.8 | 23.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| AUS | Solar Photovoltaic | PV | 325 | 325 | Nov 2024 | Operating | — | coming soon |
Owner / operator
Operator: Acciona Energy USA Global, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Acciona Energy USA Global, LLC | 100.0% | 325 MW |
Nearby plants
Within 80 km.
| Cadence Solar Energy Center | 240 MW | 7.7 km |
| Richwood Solar and Storage | — | 15.9 km |
| Prospect Municipal | 2 MW | 25 km |
| Scioto Ridge Wind Farm | 250 MW | 25.4 km |
| Whirlpool Corporation - Marion Wind Farm | 5 MW | 30.9 km |
| Hardin Solar Energy II LLC | 150 MW | 33.9 km |