Technical FAQs 4

Which building will house the Bess project?

A render of the building that would house the BESS project. Image: Flatiron Energy / 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.

Is ISO New England planning a 300MW Bess in Boston?

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.

How much energy storage does Massachusetts have?

The act requires all electric distribution companies (EDCs) to report annually on energy storage deployment within their territories no later than February 15 each year. It was reported last year that Massachusetts had a cumulative storage capacity of 569MWh, with an additional 8,806 MWh in the development pipeline.

What is the Bess project?

The two transmission lines would connect the BESS with the Eversource Mystic Substation, which is located at 173 Alford Street in Boston. The BESS and associated infrastructure are collectively referred to herein as the “Project.” A Project description and a map of the Project Site are provided below.

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