Holtsville 138kV Energy Storage

Holtsville 138kV Energy Storage is a 110 MW battery storage request in interconnection study in the NYISO interconnection queue, in Suffolk County, New York, connecting to LIPA.

Queue statusIn planning

PlanningQueued Dec 2019 (current stage)
ConsentedJan 2023 (not yet reached)
Construction (not yet reached)
OperatingTarget Sep 2026 (not yet reached)
Closed (not yet reached)

Studies assess what grid upgrades the project would need and who pays for them. A signed interconnection agreement is the main step before construction.

Request details

Queue ID: 956
Grid region: NYISO (New York)
Utility / transmission owner: LIPA
Developer: Holtsville Energy Storage, LLC
Connection point (POI): West Bus 138 kV
Location: Suffolk County, New York
Technology: Battery: 110 MW
Total requested: 110 MW
Study phase: SRIS, FS
Queue status: Active
Entered queue: 10 December 2019
Agreement signed: 11 January 2023
Proposed online date: September 2026

Location

Marker shows the centre of Suffolk County; the queue data does not give exact sites.

Power plants in New York · Transmission lines in New York

Other requests in Suffolk County

Source: Lawrence Berkeley National Laboratory, Queued Up, data through end of 2025, compiled from ISO/RTO and utility queues. Check the grid operator's own queue for the latest status. Report a problem