William F Wyman Hybrid
William F Wyman Hybrid is an oil-fired plant in Cumberland County, Maine, operated by FPL Energy Wyman LLC. No other power plant in Maine has more nameplate capacity; the state has 274 in all. Among the 857 oil-fired plants in the country it is the fourth-largest. Its biggest unit, rated at 632 MW, is the largest single generator in Maine. Ownership is shared by six organizations; the largest stake, 62%, is held by FPL Energy Wyman LLC.
Nameplate capacity, 2025
863 MW
827 MW net summer capacity
5 operable units
- Oil-fired846 MW98%
- Battery16.7 MW1.9%
Unit by unit, 1957 to 2025
operating in 2025bar height follows unit size
Unit 1 Oil-fired, 50 MW, 1957
Unit 2 Oil-fired, 50 MW, 1958
Unit 3 Oil-fired, 114 MW, 1965
Unit 4 Oil-fired, 632 MW, 1978
Unit BESS Battery, 16.7 MW, 2016
Among Maine’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1William F Wyman Hybridthis plant
- 2Westbrook Energy Center Power Plant564 MW
- 3Maine Independence Station550 MW
Other rankings
- All US power plants
- 370th of 14,286
- Oil-fired plants in Maine
- 1st of 3
- Plants in the ISO New England balancing area
- 6th of 1,475
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Oil-fired | 50 MW | 50.1 MW | 1957 | Operating |
| 2 | Oil-fired | 50 MW | 47.8 MW | 1958 | Operating |
| 3 | Oil-fired | 114 MW | 111 MW | 1965 | Operating |
| 4 | Oil-fired | 632 MW | 602 MW | 1978 | Operating |
| BESS | Battery | 16.7 MW | 16.2 MW | 2016 | Operating |
Who owns it
Shares are weighted by the nameplate capacity of each unit an owner holds.
| Owner | Share of capacity |
|---|---|
| FPL Energy Wyman LLC | 61.8% |
| Constellation Nuclear | 4.3% |
| Massachusetts Mun Wholes Electric Co | 2.7% |
| Public Service Co of NH | 2.3% |
| Green Mountain Power Corp | 2.1% |
| The Town of Lyndon Elec Dept (VT) | 0.0% |
| FPL Energy Wyman LLC (sole owner of the other units) | 26.8% |
Grid and site
- Balancing area
- ISO New England
- Reliability region
- Northeast Power Coordinating Council
- Highest grid connection voltage
- 345 kV
- Water source
- Casco River
- Nearest town on record
- Yarmouth
- Operator type
- Independent producer
- Coordinates
- 43.751°N, 70.157°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Boundary Line Solar, LLC | Solar | 1 MW | 5.6 mi northwest |
| Water Line Solar, LLC | Solar | 1 MW | 6.3 mi northwest |
| Cape Gas Turbine | Oil and petroleum | 35 MW | 8.9 mi southwest |
| S D Warren Westbrook | Biomass and waste | 69.7 MW | 10.8 mi southwest |
| Regional Waste Systems | Biomass and waste | 13.3 MW | 11.1 mi southwest |
| Dynamic - Gray Solar | Solar | 4.9 MW | 12.6 mi northwest |
| Westbrook Energy Center Power Plant | Natural gas | 564 MW | 12.7 mi southwest |
| Cross Town Energy Storage | Battery storage | 175 MW | 12.9 mi west |