Three Corners Solar — Plant Summary
- EIA Plant ID
- 66955
- Capacity
- 110 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Waldo, ME
- Operating Since
- 2024
- Generators
- 1
- Operator
- Three Corners Solar, LLC
- Parent Company
- —
- Annual Generation
- 187,364 MWh
- Capacity Factor
- 19.4%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Three Corners Solar
OperatingSolar
Ranked #2 of 153 Solar plants in ME#681 of 7447 nationally
110 MW Solar operating in Waldo, ME — ISO New England Inc.
EIAGEM
110 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Location
Coordinates
44.6126, -69.4518
County
Waldo, ME
Nearby Plants
- Unity SolarSolar5 MW · 7.8 km
- BWC Unity Pond LLCSolar4.5 MW · 8.3 km
- Benton Falls AssociatesHydro4.2 MW · 8.9 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Three Corners Solar, LLC | Longroad Energy | — |
| Owner(s) | Three Corners Solar, LLC | Longroad Energy [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Longroad Energy [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Three Corners Solar is a 110 MW solar photovoltaic power plant located in Waldo County, Maine. The plant, which began operating in 2024, is owned and operated by Three Corners Solar, LLC. It utilizes single-axis tracking technology. As of the most recent data, it ranks as the second-largest solar plant in Maine (out of 3) and 526th nationally (out of 639).
The plant's primary fuel source is the sun. In its latest year of operation, Three Corners Solar generated 187,364 MWh of electricity, achieving a capacity factor of 19.4%. The plant operates within the ISO New England Inc. balancing authority and the NPCC NERC region. Financial data indicates a power purchase agreement (PPA) price of $62.06 per MWh.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
5.7K MWh
Latest Month
187.4K MWh
Annual Generation
19.4%
Capacity Factor
Financial DataBeta
Source: FERC Electric Quarterly Reports, LBNL Utility-Scale SolarHIGH
$71.3/MWh
PPA Price
Three Corners Solar, LLC
Contract Seller
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ISO-NE
LMP Node
—
Pricing Hub
.Z.MAINE
Node Source
OSM spatial match
Albion Road SubstationSubstation
News & Articles (10)Beta
Industry·corporate
Massive solar farm proposal alarms a tiny Aroostook town
They don't want the project, which could potentially become the state's largest utility-scale solar project both by acreage and power...
The County·1 years ago
Regulatory·permitting
More Maine towns are pushing back against solar farms
The town's select board created an ordinance to restrict the development of solar farms and specify removal steps once they are no longer in service.
Bangor Daily News·2 years ago
General
Construction Begins on Maine’s Largest Solar Project
The Three Corners Solar project in Benton, Clinton, and Unity Township in Kennebec County, Maine began construction in November 2022.
EcoWatch·3 years ago
Industry·corporate
Construction Begins on Maine’s Largest Solar Project
The Three Corners Solar project in Benton, Clinton, and Unity Township in Kennebec County, Maine began construction in November 2022.
EcoWatch·3 years ago
Last updated 2026-03-26
View all 10 articles