CLIES 70MW
70 MW storage in Suffolk, NY · In queue since November 2020 · Proposed COD December 2026
70 MW
Capacity
1
Components
Battery
5y 6m
In Queue
System Impact Study
IA Status
COD target: 2026
Total Duration
6y 1m
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: 2026-12-01
The CLIES 70MW project is a proposed 70 MW battery storage project located in Suffolk County, New York. The developer is Caithness LI Energy Storage, LLC, and the interconnecting utility is LIPA. It is currently in the System Impact Study phase of the NYISO interconnection queue, under queue ID NYISO-1117, with an entry date of November 25, 2020. The proposed commercial operation date is December 1, 2026, and the point of interconnection is the Sills Road 138kV substation.
The project consists solely of battery storage, with a total capacity of 70 MW. It is listed as an active project within the NYISO interconnection queue. The project has appeared in recent news coverage regarding energy storage developments in the Long Island region.
Generated from interconnection queue and public data sources
State
NY
County
Suffolk
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
Caithness LI Energy Storage, LLC
Utility
LIPA
Entity
NYISO
Service Type
—
Point of Interconnection
Sills Road 138kV
Data Source
LBNL + Live
- 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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