Mill Run BESS
260 MW storage in Onondaga, NY · In queue since September 2024 · Proposed COD September 2028
260 MW
Capacity
1
Components
Battery
1y 8m
In Queue
—
IA Status
COD target: 2028
Total Duration
4 years
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: 2028-09-01
Mill Run BESS is a proposed 260 MW battery storage project located in Onondaga County, New York. Developed by Renew Development HoldCo LLC, the project consists of 260 MW of battery capacity. It is currently active in the NYISO interconnection queue under queue ID NYISO-C24-203, with an interconnection queue entry date of September 19, 2024, and a proposed commercial operation date of September 1, 2028.
The project is interconnected to the Elbridge - Geres Lock 115kV 18 & 19 lines. Recent news coverage indicates activity related to regulatory and industry developments surrounding the project.
Generated from interconnection queue and public data sources
State
NY
County
Onondaga
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
Renew Development HoldCo LLC
Utility
NM-NG
Entity
NYISO
Service Type
—
Point of Interconnection
Elbridge - Geres Lock 115kV 18 & 19 lines
Data Source
LBNL
- ISO / RTO
- NYISO
- Trading Hub
- ZONE C
- 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.
Last updated 2026-03-26
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