The Outer Cape Battery Energy Storage System is a 24,900kW energy storage project located in Provincetown, Cape Cod, Massachusetts, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project will be commissioned in 2021.


The Outer Cape Battery Energy Storage System is being developed by Eversource Energy. The project is owned by Eversource Energy (100%).

The key applications of the project are improve electric reliability and grid support services.

Contractors involved

Eversource Energy is the owner. Eversource Energy is the developer.

Additional information

Energy storage system will support the four communities along the Outer Cape: Eastham, Provincetown, Truro and Wellfleet. The utility-owned project is part of a broader expansion of energy storage across Eversource’s New England service territory. The lithium ion battery storage facility will provide 10 hours of backup power in the winter and up to three hours in the summer.

About Eversource Energy

Eversource Energy (Eversource) is an energy holding company. The company distributes and transmits electricity and supplies natural gas and water. The company sources water from owned surface water reservoirs and groundwater wells and purchases water from other water suppliers. It procures electricity through short-term and spot purchases in the New England wholesale power market. Eversource also offers energy conservation and management solutions through interactive planning tools, energy saving tips, and energy usage information; and electric vehicle charging services. The company serves residential, commercial, industrial, municipal and fire protection and other customers in Connecticut, Massachusetts and New Hampshire. Eversource is headquartered in Springfield, Massachusetts, the US.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.