Bonny Eagle
Battery storage power plant · York County, Maine
Nameplate capacity
15 MW
Rank in Maine
#55
of 274 plants
In service since
2010
January 2010
Details
- Primary fuel
- Battery storage
- Technology
- Batteries
- Operator
- Brookfield White Pine Hydro LLC
- County
- York County
- Generating units
- 7
- Share of state capacity
- 0.25%
- Rank among battery storage plants in Maine
- #2 of 5
- EIA plant code
- 1482
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| BES1 | Batteries | 8.0 MW | 8.0 MW | 2023 | Operating |
| 1 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
| 2 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
| 3 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
| 4 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
| 5 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
| 6 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2010 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Maine
| Hydro Kennebec Project | Hydro | 15 MW |
| RoxWind | Wind | 15 MW |
| Pejepscot Hydroelectric Project | Hydro | 14 MW |
| Regional Waste Systems | Other | 13 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 15 MW solar plant and a 15 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Maine power plants · What Maine actually generates