How many battery storage projects are in Massachusetts?

Massachusetts has 133 operating utility-scale battery storage projects with 0.7 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest battery storage project in Massachusetts?

Medway Grid in Norfolk County, Massachusetts is the largest, at 250 MW. It came online in 2026.

How many battery storage projects were built in Massachusetts in 2025?

9 battery storage projects came online in Massachusetts in 2025, with 173 MW of capacity.

Who is developing battery storage projects in Massachusetts?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Battery storage projects in Massachusetts

Massachusetts has 133 operating battery storage projects with 0.7 GW of capacity. 9 came online in 2025.

Operating133

See planned battery storage projects in Massachusetts

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

Massachusetts had 2 battery storage projects online in 2017 and 133 in 2026

107

123

132

133

2017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Battery storage projects online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest battery storage projects in Massachusetts

Operating, by capacity

#	Battery storage project	County	Year online	Capacity
1	Medway Grid	Norfolk County	2026	250 MW
2	Cranberry Point Energy Storage	Plymouth County	2025	150 MW
3	Outer Cape Community Battery	Barnstable County	2022	25 MW
4	Nantucket Hybrid	Nantucket County	2019	6 MW
5	Minuteman Energy Storage	Middlesex County	2019	5 MW
6	Blodgett Solar CSG	Middlesex County	2021	5 MW
7	0 Hammond St CSG	Plymouth County	2021	5 MW
8	59 Federal Rd(CSG)	Plymouth County	2021	5 MW
9	Huxley Solar	Hampden County	2022	5 MW
10	Beacon Solar, LLC	Hampshire County	2022	5 MW

Battery storage projects that came online most recently in Massachusetts

Newest first

#	Battery storage project	County	Year online	Capacity
1	Medway Grid	Norfolk County	2026	250 MW
2	Milk Street Solar, LLC	Worcester County	2025	1 MW
3	NL MA - Division	Bristol County	2025	1 MW
4	Wakefield MA BESS 1	Middlesex County	2025	5 MW
5	Upland	Plymouth County	2025	2 MW
6	Ring Road	Plymouth County	2025	2 MW
7	Cranberry Point Energy Storage	Plymouth County	2025	150 MW
8	Kearsarge Riverpark I LLC	Middlesex County	2025	5 MW
9	Kearsarge Riverpark II LLC	Middlesex County	2025	5 MW
10	Dudley Landfill Solar LLC	Worcester County	2025	1 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks battery storage projects

Operating battery storage projects come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about battery storage projects in Massachusetts

How many battery storage projects are in Massachusetts?: Massachusetts has 133 operating utility-scale battery storage projects with 0.7 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest battery storage project in Massachusetts?: Medway Grid in Norfolk County, Massachusetts is the largest, at 250 MW. It came online in 2026.
How many battery storage projects were built in Massachusetts in 2025?: 9 battery storage projects came online in Massachusetts in 2025, with 173 MW of capacity.
Who is developing battery storage projects in Massachusetts?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.