How many battery storage projects are planned in ISO-NE?

Developers have proposed 24 battery storage projects in ISO-NE with 5.9 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.

What is the largest planned battery storage project in ISO-NE?

Battery Storage in Middlesex County, Massachusetts is the largest planned, at 508 MW. It is expected to come online in 2028.

Who is developing battery storage projects in ISO-NE?

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.

Planned battery storage projects in ISO-NE

Developers have proposed 24 battery storage projects in ISO-NE with 5.9 GW of capacity, in the grid operators' interconnection queues.

Planned24

See operating battery storage projects in ISO-NE

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

More planned battery storage projects in ISO-NE are expected online in 2028 than in any other year

2026’262027’272028’282029’292030’302031’312032’322033’33

Planned battery storage projects by the year they're expected online. Source: the grid operators' interconnection queues, compiled by Cleanview.

The 10 largest planned battery storage projects in ISO-NE

Planned, by capacity

#	Battery storage project	Location	Expected online	Capacity
1	Battery Storage	Middlesex County, Massachusetts	2028	508 MW
2	Battery Storage	Barnstable County, Massachusetts	2031	500 MW
3	Battery Storage	Barnstable County, Massachusetts	2028	500 MW
4	Battery Storage	Middlesex County, Massachusetts	2028	500 MW
5	Battery Storage	Bristol County, Massachusetts	2027	350 MW
6	Lite Brite Battery Storage	Suffolk County, Massachusetts	2028	300 MW
7	Battery Storage	Norfolk County, Massachusetts	2027	300 MW
8	Willard Storage (NYISO-C24-148)	Rensselaer County, New York	2028	300 MW
9	Battery Storage	Berkshire County, Massachusetts	2028	290 MW
10	Hecate Energy Eastern Ave Energy Center	Suffolk County, Massachusetts	2027	250 MW

Planned battery storage projects expected online soonest in ISO-NE

In the next 18 months, soonest first

#	Battery storage project	Location	Expected online	Capacity
1	Battery Storage	Worcester County, Massachusetts	2027	204 MW
2	Battery Storage	Bristol County, Massachusetts	2027	350 MW
3	Battery Storage	Norfolk County, Massachusetts	2027	300 MW
4	Hecate Energy Eastern Ave Energy Center	Suffolk County, Massachusetts	2027	250 MW
5	NY Chateaugay 0 Willis Rd Storage (NYISO-C24-304-004)	Franklin County, New York	2028	150 MW
6	Norman Street Battery Storage	Middlesex County, Massachusetts	2028	204 MW
7	Battery Storage	Middlesex County, Massachusetts	2028	500 MW
8	Battery Storage	Worcester County, Massachusetts	2028	180 MW
9	Battery Storage	Middlesex County, Massachusetts	2028	508 MW
10	Lite Brite Battery Storage	Suffolk County, Massachusetts	2028	300 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 ISO-NE

How many battery storage projects are planned in ISO-NE?: Developers have proposed 24 battery storage projects in ISO-NE with 5.9 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned battery storage project in ISO-NE?: Battery Storage in Middlesex County, Massachusetts is the largest planned, at 508 MW. It is expected to come online in 2028.
Who is developing battery storage projects in ISO-NE?: 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.