Battery Storage
BetaActiveBatteryISO-NELBNL + Live
135.6 MW storage in Middlesex, MA · In queue since June 2024 · Proposed COD May 2028
135.6 MW
Capacity
1
Components
Battery
1y 9m
In Queue
System Impact Study
IA Status
COD target: 2028
Interconnection Timeline
Total Duration
3y 11m
Impact Study25%
Queue EntryJun 4, 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: 2028-05-01
Project Details
State
MA
County
Middlesex
Region
ISO-NE
Developer
—
Utility
—
Entity
ISO-NE
Point of Interconnection
Primary Point of Interconnection - National Grid Tewksbury 115kV substation, Open position opposite the J-162 line
Data Source
LBNL + Live