# Montauk Energy Storage Center

NYISO asset profile · https://askthegrid.com/assets/facilities/montauk-energy-storage-center

Eight-hour battery serving Montauk

Montauk Energy Storage Center is an operating 5 MW/40 MWh, eight-hour lithium-ion battery at 10 North Shore Road in Montauk. NextEra developed the project and holds 50% through an affiliate; a National Grid affiliate holds the other 50%, and LIPA purchases capacity and related services under a contract running through 2038.

## Profile

- **Current registry:** The June 2026 preliminary EIA inventory lists Montauk Energy Storage Center LLC as operator and status OP.

## Metrics

- **Storage nameplate:** 5 MW / 40 MWh — June 2026 preliminary EIA inventory; 1 generator record.

## Facts

- **EIA operator:** Montauk Energy Storage Center LLC — June 2026 preliminary EIA inventory; status OP.
- **Location:** 10 North Shore Road, Montauk · Suffolk · NY
- **Technology:** Lithium-ion battery
- **Operating records:** 2019-02

## Related parties

- **developer / 50% owner:** NextEra Energy Resources affiliate — Montauk Energy Storage Center record ([source](https://der.nyserda.ny.gov/projects/937/))
- **50% owner:** National Grid affiliate — May 24, 2017 board meeting minutes ([source](https://www.lipower.org/wp-content/uploads/2017/03/Minutes20of20May202420201720Board20Mtg.FINAL1_.pdf))
- **capacity and services purchaser:** Long Island Power Authority — May 24, 2017 board meeting minutes ([source](https://www.lipower.org/wp-content/uploads/2017/03/Minutes20of20May202420201720Board20Mtg.FINAL1_.pdf))

## Sources

- [June 2026 EIA-860M generator inventory](https://www.eia.gov/electricity/data/eia860m/xls/june_generator2026.xlsx) — U.S. Energy Information Administration · authoritative — Current generator capacity, technology, operating status, operator, and service-date records.
- [Montauk Energy Storage Center record](https://der.nyserda.ny.gov/projects/937/) — New York State Energy Research and Development Authority · authoritative — Montauk is an operating 5 MW/40 MWh eight-hour battery.
- [South Fork resources board material](https://www.lipower.org/wp-content/uploads/2019/02/2017-01-South-Fork-Board-Material.pdf) — Long Island Power Authority · authoritative — The source identifies 1 battery building.

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