Green Isles Energy Storage
400 MW storage in Suffolk, NY · In queue since October 2024 · Proposed COD December 2029
400 MW
Capacity
1
Components
Battery
1y 7m
In Queue
—
IA Status
COD target: 2029
Total Duration
5y 2m
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
Green Isles Energy Storage is a proposed 400 MW battery storage project located in Suffolk County, New York. The project, developed by CEDAR HOLDCO LLC, is in the New York Independent System Operator (NYISO) interconnection queue as entry NYISO-C24-351, with a queue entry date of October 15, 2024. The proposed commercial operation date is December 1, 2029. The point of interconnection is the Brookhaven - Sills Rd 138 kV Circuit #1.
The project is currently listed as active in the interconnection queue and has been the subject of recent news coverage. It is intended to connect to the Long Island Power Authority (LIPA) grid.
Generated from interconnection queue and public data sources
State
NY
County
Suffolk
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
CEDAR HOLDCO LLC
Utility
LIPA
Entity
NYISO
Service Type
—
Point of Interconnection
Brookhaven - Sills Rd 138 kV Circuit #1
Data Source
LBNL
- ISO / RTO
- NYISO
- Trading Hub
- ZONE K
- Hub Confidence
- MEDIUM
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.
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