East Setauket Storage II
248 MW storage in Suffolk, NY · In queue since September 2024 · Proposed COD December 2029
248 MW
Capacity
1
Components
Battery
1y 10m
In Queue
—
IA Status
COD target: 2029
Total Duration
5y 3m
Study Phase
C24
Interconnection request submitted to ISO/RTO
NYISO transitioned to a Transitional Cluster Study (TCS) format in 2024.
Typical: >42 months (historical); ~24 months target
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2029-12-01
Brookhaven Town issued notice regarding battery storage facilities
sourceEast Setauket Storage II is a proposed 248 MW battery storage project located in Suffolk County, New York. The project, developed by East Setauket Energy Storage, LLC, is interconnected to the Long Island Power Authority (LIPA) grid. It is listed in the New York Independent System Operator (NYISO) interconnection queue as entry NYISO-C24-183, with a queue entry date of September 17, 2024, and a proposed commercial operation date of December 1, 2029.
The project consists of 248 MW of battery storage capacity. It is currently listed as active in the NYISO interconnection queue. The point of interconnection is the Holbrook - North Shore Beach 138kV line. The project has been mentioned in recent news coverage related to regulatory matters.
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
NY
County
Suffolk
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
East Setauket Energy Storage, LLC
Utility
LIPA
Entity
NYISO
Service Type
—
Point of Interconnection
Holbrook - North Shore Beach 138kV
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- NYISO
- Trading Hub
- ZONE K
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- NORTH
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
Last updated 2026-03-26
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