Registry, engineering, and operating metrics shown on a consistent EIA basis.
| Metric | Cunningham Storage | Wigeon Whistle Battery Storage Plant |
|---|---|---|
| Capacity | 190 MW | 120 MW |
| Technology | Batteries | Batteries |
| Operator | Acciona Energy USA Global, LLC | Wigeon Whistle BESS LLC |
| Operating units | 1 | 1 |
| Latest 12-month generation | 102.7 GWh | 53.4 GWh |
| Latest complete-year capacity factor | — | — |
| National technology rank | #71 of 962 | #132 of 962 |
| Latest EIA report | 2026-06 | 2026-06 |