How many battery storage projects are in NYISO?

NYISO has 55 operating utility-scale battery storage projects with 0.3 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest battery storage project in NYISO?

Orangeville Storage in Wyoming County, New York is the largest, at 25 MW. It came online in 2022.

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

7 battery storage projects came online in NYISO in 2025, with 34 MW of capacity.

Who is developing battery storage projects in NYISO?

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 NYISO

NYISO has 55 operating battery storage projects with 0.3 GW of capacity. 7 came online in 2025.

Operating55

See planned battery storage projects in NYISO

Updated monthly. Last updated November 2026.

Under 50 MW50–249 MW250 MW and up

Updated monthly. Last updated November 2026.

NYISO had 1 battery storage projects online in 2016 and 55 in 2026

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

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

The 10 largest battery storage projects in NYISO

Operating, by capacity

#	Battery storage project	Location	Year online	Capacity
1	Orangeville Storage	Wyoming County, New York	2022	25 MW
2	Stephentown Spindle	Rensselaer County, New York	2011	20 MW
3	KCE NY 1	Saratoga County, New York	2019	20 MW
4	Willis Battery Storage	Franklin County, New York	2023	20 MW
5	NY6 Battery	Erie County, New York	2023	20 MW
6	Empire Clean Energy, LLC	Richmond County, New York	2025	10 MW
7	Gabby Giffords Clean Energy, LLC	Richmond County, New York	2024	8 MW
8	Nelson Clean Energy, LLC	Richmond County, New York	2026	8 MW
9	Fox Hills Battery Station	Richmond County, New York	2023	8 MW
10	Brownsville Energy Storage System	Kings County, New York	2025	6 MW

Battery storage projects that came online most recently in NYISO

Newest first

#	Battery storage project	Location	Year online	Capacity
1	Sugar Maple Clean Energy LLC	Richmond County, New York	2026	3 MW
2	Mourning Dove Clean Energy, LLC	Richmond County, New York	2026	3 MW
3	Nelson Clean Energy, LLC	Richmond County, New York	2026	8 MW
4	Yorktown NY 1, LLC	Westchester County, New York	2025	2 MW
5	Brownsville Energy Storage System	Kings County, New York	2025	6 MW
6	Patchogue ESS	Suffolk County, New York	2025	2 MW
7	AE-ESS NWS 1, LLC	Queens County, New York	2025	5 MW
8	Empire Clean Energy, LLC	Richmond County, New York	2025	10 MW
9	55 Drive BESS	Queens County, New York	2025	5 MW
10	Arthur Kill Energy, LLC	Richmond County, New York	2025	5 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 NYISO

How many battery storage projects are in NYISO?: NYISO has 55 operating utility-scale battery storage projects with 0.3 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest battery storage project in NYISO?: Orangeville Storage in Wyoming County, New York is the largest, at 25 MW. It came online in 2022.
How many battery storage projects were built in NYISO in 2025?: 7 battery storage projects came online in NYISO in 2025, with 34 MW of capacity.
Who is developing battery storage projects in NYISO?: 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.