SP-231 Clifton
Solar power plant · Penobscot County, Maine
Nameplate capacity
4.9 MW
Rank in Maine
#146
of 274 plants
In service since
2024
December 2024
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Madison Energy Investments LLC
- County
- Penobscot County
- Generating units
- 1
- Share of state capacity
- 0.08%
- Rank among solar plants in Maine
- #74 of 175
- EIA plant code
- 69074
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| SP231 | Solar Photovoltaic | 4.9 MW | 4.9 MW | 2024 | 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
| Rumford ESS | Battery storage | 4.9 MW |
| SCS Harpswell 012903 Brunswick, LLC | Solar | 4.9 MW |
| Sabattus SB01 | Solar | 4.9 MW |
| Sanford -NY | Solar | 4.9 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 4.9 MW solar plant and a 4.9 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