Battery Storage — Project Summary

Queue ID
ISO-NE-1557
Capacity
240.1577 MW
Technology
Battery
Status
active
Location
Essex, MA
Region
ISO-NE
Developer
—
IA Status
System Impact Study

Battery Storage

BetaActiveBatteryISO-NELBNL + Live

240.158 MW storage in Essex, MA · In queue since June 2024 · Proposed COD January 2028

240.158 MW

Capacity

1

Components

Battery

1y 9m

In Queue

System Impact Study

IA Status

COD target: 2028

Interconnection Timeline

Total Duration

3y 7m

Impact Study25%
Queue EntryJun 6, 2024

Interconnection request submitted to ISO/RTO

TCS StudyCurrent

ISO-NE is transitioning to cluster studies per FERC Order 2023.

Typical: 25–30 months (recent)

Interconnection Agreement

Interconnection agreement not yet executed

Typical: 30–60 days (negotiation)

Commercial Operation

Proposed COD: 2028-01-01

Project Details

State

MA

County

Essex

Region

ISO-NE

Developer

—

Utility

—

Entity

ISO-NE

Point of Interconnection

115 kV Wakefield Junction Substation

Data Source

LBNL + Live

News & Articles (2)Beta
General

Battery storage moves forward in Massachusetts as barriers fall

Development and construction of battery energy storage systems (BESS) in Massachusetts has become more feasible as a result of expanded...

Solar Power World·2 days ago
General

Flatiron Energy Closes on $540M for Battery Energy Storage Project Largest in Massachusetts

Flatiron Energy has reached financial close on $540 million to support the Taft Project, a 200 MW battery energy storage facility to be...

Orrick·4 months ago

Last updated 2026-03-26