The Groton Submarine Base Fuel Cell System is a 7,400kW energy storage project located in Groton, Connecticut, US.

The electro-chemical battery energy storage project uses fuel cells as its storage technology. The project was announced in 2017.


The Groton Submarine Base Fuel Cell System is owned by Connecticut Municipal Electric Energy Cooperative (100%).

The key applications of the project are on-site power and resiliency.

Contractors involved

Connecticut Municipal Electric Energy Cooperative is the owner. FuelCell Energy is the technology provider for the project.

Additional information

FuelCell Energy has signed a letter of intent with Connecticut Municipal Electric Energy Cooperative (CMEEC) on behalf of its municipal owners for long-term supply of 7.4 MW of power. Two SureSource 4000TM power plants with total output of 7.4 MW are planned to be sited at the U.S. Submarine Base in Groton, Connecticut. The fuel cell plant is part of a multifaceted plan by CMEEC to provide new power resources and support the desire of the Department of Defense to add resiliency and grid independence to key military installations. The letter of intent is subject to the parties reaching a definitive agreement. Contract execution is expected by summer 2017.


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