Battery Storage
508.248 MW storage in Middlesex, MA · In queue since June 2021 · Proposed COD May 2028
508.248 MW
Capacity
1
Components
Battery
5y 1m
In Queue
IA Executed
IA Phase
Signed Apr 2024
Queue → IA
2y 10m
IA → COD
4y 1m
Total Duration
2y 10m
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: 2028-05-31
Interconnection Agreement executed with ISO-NE
Proposed commercial operation date per queue filing
The Battery Storage project is a proposed 508.25 MW battery storage development in Middlesex County, Massachusetts. It is located within the ISO-NE region and consists entirely of battery technology. The project entered the ISO-NE interconnection queue as queue ID ISO-NE-1143 on June 15, 2021, with a proposed commercial operation date of May 31, 2028. The interconnection agreement (IA) has been executed.
The project has been the subject of recent news coverage, with six articles focusing on deals and industry developments.
Generated from interconnection queue and public data sources
Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
MA
County
Middlesex
Grid Region
ISO New England
Market
ISO/RTO Member
Developer
—
Utility
—
Entity
ISO-NE
Service Type
NRIS
Point of Interconnection
Mystic 345 kV between breaker 101, 106 and 107
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. 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 — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. 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. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- 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.
Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
