Suffolk County Storage II
70 MW storage in Suffolk, NY · In queue since September 2024 · Proposed COD April 2028
70 MW
Capacity
1
Components
Battery
1y 8m
In Queue
—
IA Status
COD target: 2028
Total Duration
3y 7m
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: 2028-04-01
Suffolk County Storage II is a proposed 70 MW battery storage project located in Suffolk County, New York. The project, developed by Suffolk County Energy Storage II, LLC, is interconnected to the Long Island Power Authority (LIPA) grid at the Southold 69kV station. It is currently listed as active in the New York Independent System Operator (NYISO) interconnection queue under queue ID NYISO-CR24-1001, with an entry date of September 18, 2024, and a proposed commercial operation date of April 1, 2028.
The project consists of 70 MW of battery storage capacity. It is in the NYISO interconnection queue. Recent news coverage has discussed the project.
Generated from interconnection queue and public data sources
State
NY
County
Suffolk
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
Suffolk County Energy Storage II, LLC
Utility
LIPA
Entity
NYISO
Service Type
—
Point of Interconnection
Southold 69kV station.
Data Source
LBNL
- ISO / RTO
- NYISO
- Trading Hub
- ZONE K
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- ONONDAGA_REF_OCCRA
- POI Substation
- Southwood Station
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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