Holtsville Brookhaven Battery Storage
79.9 MW storage in Suffolk, NY · In queue since September 2021 · Proposed COD March 2026
79.9 MW
Capacity
1
Components
Battery
4y 10m
In Queue
System Impact Study
IA Phase
COD target: 2026
Total Duration
4y 6m
Schedule
4 months past proposed COD
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: 2026-03-01
The Holtsville Brookhaven Battery Storage project is a proposed 79.9 MW battery storage project located in Suffolk County, New York. The project is being developed by Holtsville Brookhaven Battery Storage and is interconnected to the Long Island Power Authority (LIPA) grid. It is listed in the New York Independent System Operator (NYISO) interconnection queue as project number NYISO-1255, with a queue entry date of September 22, 2021.
The proposed commercial operation date for the Holtsville Brookhaven Battery Storage project is March 1, 2026. The project's interconnection status is currently in the System Impact Study phase. The point of interconnection (POI) is on Line 69-849 from West Yaphank to North Bellport.
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
Holtsville Brookhaven Battery Storage LLC
Utility
LIPA
Entity
NYISO
Service Type
—
Point of Interconnection
Line 69-849 from West Yaphank to North Bellport
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.
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Ask about Holtsville Brookhaven Battery StorageForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
