Hecate Energy Eastern Ave Energy Center
250 MW storage in Suffolk, MA · In queue since April 2021 · Proposed COD November 2026
250 MW
Capacity
1
Components
Battery
5y 1m
In Queue
IA Executed
IA Status
COD target: 2026
Total Duration
5y 7m
Interconnection request submitted to ISO/RTO
ISO-NE is transitioning to cluster studies per FERC Order 2023.
Typical: 25–30 months (recent)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2026-11-09
The Hecate Energy Eastern Ave Energy Center is a proposed 250 MW battery storage project located in Suffolk County, Massachusetts. The project consists of a single 250 MW battery component.
The project is listed in the ISO-NE interconnection queue as queue ID 1115, with an entry date of April 8, 2021, and a proposed commercial operation date of November 9, 2026. Its interconnection agreement has been executed. The point of interconnection is the Sta 488 Chelsea 115 kV substation. The project has been mentioned in recent news coverage.
Generated from interconnection queue and public data sources
State
MA
County
Suffolk
Grid Region
ISO New England
Market
ISO/RTO Member
Developer
—
Utility
ISO-NE
Entity
ISO-NE
Service Type
—
Point of Interconnection
Sta 488 Chelsea 115 kV substation
Data Source
LBNL + Live
- ISO / RTO
- ISO-NE
- Trading Hub
- .H.INTERNAL_HUB
- 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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