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44.3 MW Batteries (14 MW) + Conventional Hydroelectric (30 MW) operating in Coos, NH — ISO New England Inc.
44.3 MW
Nameplate Capacity
22
Generators
units
Hybrid (2)
Technology
Batteries + Conventional Hydroelectric
1914
Operating Since
Coordinates
44.3889, -71.1645
County
Coos, NH
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Great Lakes Hydro America LLC | — | — |
| Owner(s) | Great Lakes Hydro America LLC | — | — |
| Status | Operating | — | — |
The Berlin Gorham power plant is located in Coos County, New Hampshire. The facility, which began operating in 1914, has a total capacity of 44.3 MW across 22 generators and is owned and operated by Great Lakes Hydro America LLC. The plant is a hybrid facility utilizing both conventional hydroelectric generation and battery storage. The primary fuel source is water (WAT). Berlin Gorham ranks 3rd out of 32 power plants in New Hampshire and 324th out of 1464 plants nationally.
The plant includes a battery energy storage system (BESS) with a capacity of 14 MWh and a duration of 1 hour, utilizing lithium-ion battery chemistry (LIB). The latest annual generation data indicates an output of 133,480 MWh, resulting in a capacity factor of 34.3%. Berlin Gorham operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
9.5K MWh
Latest Month
133.5K MWh
Annual Generation
34.3%
Capacity Factor
2013
$913/kW
Est. Construction Cost
Total estimated cost: $40.4M
Market Position
ISO/RTO Market
ISO-NE
LMP Node
—
Pricing Hub
.Z.NEWHAMPSHIRE
Node Source
OSM spatial match
Last updated 2026-03-26
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Grid Voltage
22.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP