System operator ISO New England has given the go-ahead for a 300MW/1,200MWh indoor BESS located in Boston, Massachusetts under development by developer and IPP Flatiron Energy.
The Massachusetts Energy Siting Facilities Board has approved two energy storage facilities with a combined capacity of 400 MW/800 MWh. This decision overturns previous rulings that hindered the development of these facilities. Once operational, they will fulfill 80% of the state's 1 GWh energy storage deployment target for 2025.
System operator ISO New England has given the go-ahead for a 300MW/1,200MWh indoor BESS located in Boston, Massachusetts under development by developer and IPP Flatiron Energy. ISO New England approved a proposed plan application associated with the project in the form of a letter published on the system operator's website on 6 January, 2025.
The project is expected to be operational by May 26, 2028. Boulder, Colorado-based Flatiron Energy focuses on utility-scale battery storage systems in the Northeast and Mid-Atlantic regions, aiming to address climate change and promote environmental justice through its energy solutions for communities and electricity users.
Once operational, they will fulfill 80% of the state's 1 GWh energy storage deployment target for 2025. The final rulings for the Cranberry Point Energy Storage and the Medway Grid projects were issued on June 30th. The Medway facility in Medway, Mass. will be located in the Eversource utility region, and connect to an Eversource substation.