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Berlin Gorham

Battery storage power plant · Coos County, New Hampshire

Nameplate capacity

44 MW

Rank in New Hampshire

#11

of 61 plants

In service since

1929

January 1929

Details

Primary fuel: Battery storage
Technology: Batteries
Operator: Great Lakes Hydro America LLC
County: Coos County
Generating units: 22
Share of state capacity: 0.97%
Rank among battery storage plants in New Hampshire: #1 of 1
EIA plant code: 54639

Generating units

Individual generating units at Berlin Gorham
Unit	Technology	Nameplate	Summer	Online	Status
BESS1	Batteries	14 MW	14 MW	2023	Operating
RS3	Conventional Hydroelectric	4.1 MW	4.1 MW	2020	Operating
RS1	Conventional Hydroelectric	3.8 MW	3.8 MW	2020	Operating
CAS3	Conventional Hydroelectric	3.1 MW	3.1 MW	2018	Operating
CAS1	Conventional Hydroelectric	2.4 MW	2.4 MW	2014	Operating
CAS2	Conventional Hydroelectric	2.4 MW	2.4 MW	2016	Operating
SHL3	Conventional Hydroelectric	1.8 MW	1.8 MW	1929	Operating
GOR1	Conventional Hydroelectric	1.2 MW	1.2 MW	2020	Operating
GOR2	Conventional Hydroelectric	1.2 MW	1.2 MW	2020	Operating
GOR3	Conventional Hydroelectric	1.2 MW	1.2 MW	2020	Operating
GOR4	Conventional Hydroelectric	1.2 MW	1.2 MW	2020	Operating
SH2	Conventional Hydroelectric	0.9 MW	0.9 MW	2016	Operating
SHL1	Conventional Hydroelectric	0.9 MW	0.9 MW	2016	Operating
SM1	Conventional Hydroelectric	0.8 MW	0.8 MW	1980	Operating
SM2	Conventional Hydroelectric	0.8 MW	0.8 MW	1980	Operating
SM4	Conventional Hydroelectric	0.8 MW	0.8 MW	1980	Operating
SM3	Conventional Hydroelectric	0.7 MW	0.8 MW	1980	Operating
XP5	Conventional Hydroelectric	0.7 MW	0.7 MW	2024	Operating
XP1	Conventional Hydroelectric	0.6 MW	0.6 MW	2021	Operating
XP2	Conventional Hydroelectric	0.6 MW	0.6 MW	2021	Operating
XP3	Conventional Hydroelectric	0.6 MW	0.6 MW	2021	Operating
XP4	Conventional Hydroelectric	0.5 MW	0.5 MW	2021	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 New Hampshire

Burgess BioPower	Other	75 MW
Groton Wind LLC	Wind	48 MW
Antrim Wind	Wind	29 MW
NE Renewable Tamworth, LLC	Other	25 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 44 MW solar plant and a 44 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 New Hampshire power plants · What New Hampshire actually generates