Great Lakes Hydro America - ME — Plant Summary
- EIA Plant ID
- 54134
- Capacity
- 158 MW
- Primary Fuel
- Hydro
- Technology
- Batteries, Conventional Hydroelectric
- Status
- Operating
- Location
- Penobscot, ME
- Operating Since
- 1917
- Generators
- 33
- Operator
- Great Lakes Hydro America LLC
- Parent Company
- —
- Annual Generation
- 570,871 MWh
- Capacity Factor
- 41.2%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Great Lakes Hydro America - ME
OperatingBESSHydroHybrid
Ranked #1 of 48 Hydro plants in ME#125 of 1454 nationally
158 MW Batteries (20 MW) + Conventional Hydroelectric (138 MW) operating in Penobscot, ME — ISO New England Inc.
EIAWD
158 MW
Nameplate Capacity
33
Generators
units
Hybrid (2)
Technology
Batteries + Conventional Hydroelectric
1917
Operating Since
Location
Coordinates
45.6472, -68.7044
County
Penobscot, ME
Nearby Plants
- Our KatahdinSolar5 MW · 0.5 km
- Medway HydroHydro4 MW · 13.2 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Great Lakes Hydro America LLC | — | — |
| Owner(s) | Great Lakes Hydro America LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Located in Penobscot County, Maine, the Great Lakes Hydro America - ME plant has a total capacity of 158 MW. The facility, which began operating in 1917, is owned and operated by Great Lakes Hydro America LLC. The plant utilizes conventional hydroelectric technology and water (WAT) as its primary fuel source. It also incorporates battery storage, making it a hybrid facility. The battery energy storage system (BESS) has a storage capacity of 10 MWh and a duration of 1 hour, utilizing lithium-ion (LIB) chemistry.
The plant consists of 33 generators and operates within the ISO New England Inc. balancing authority and the NPCC NERC region. In the most recent year with available data, the plant generated 570,871 MWh, achieving a capacity factor of 41.2%. Great Lakes Hydro America - ME is ranked as the largest hydroelectric plant in the state of Maine and holds a national ranking of 125 out of 194 similar facilities.
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
40.9K MWh
Latest Month
570.9K MWh
Annual Generation
41.2%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ISO-NE
LMP Node
69256
Pricing Hub
.Z.MAINE
Node Source
EIA-860 direct report
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