Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Hardin Solar III | AEUG Union Solar, LLC |
|---|---|---|
| Capacity | 250 MW | 325 MW |
| Technology | Solar Photovoltaic | Solar Photovoltaic |
| Operator | Hardin Solar Energy III | Acciona Energy USA Global, LLC |
| Operating units | 1 | 1 |
| Latest 12-month generation | 525.9 GWh | 657.4 GWh |
| Latest complete-year capacity factor | — | 23.1% (2025) |
| National technology rank | #76 of 7,234 | #27 of 7,234 |
| Latest EIA report | 2026-04 | 2026-04 |