The Portsmouth Naval Shipyard Microgrid Project is a smart grid project being developed in Portsmouth Naval Shipyard, Maine, US. It is a microgrid project.

The installation of the project began in 2020 and is expected to be completed in 2022.


The Portsmouth Naval Shipyard Microgrid Project is currently under construction and will use smart grid technology. The project has a rated capacity of 21.5MW.

The $85m smart grid project is owned by U.S. Navy and Marine Corps and is being installed by Ameresco.

The Portsmouth Naval Shipyard Microgrid Project has the following equipment associated with it:

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– 1 MW/2 MWh Battery Energy Storage System
– Microgrid Controller

Portsmouth Naval Shipyard Microgrid Project development status

The development of Portsmouth Naval Shipyard Microgrid Project was started in 2020. The project is expected to be commissioned in 2022.

Contractors involved

U.S. Navy and Marine Corps has partnered with Ameresco to construct and complete the Portsmouth Naval Shipyard Microgrid Project.

Additional information

– The project expands on a long-term partnership between Ameresco and the Kittery, Maine facility, extending back to Ameresco’s installation of a microgrid controller at the facility in 2015.

The project includes:
– A new 7.5 MW combined heat and power (CHP) plant, which expands upon an existing 14 MW CHP power plant at the site
– 1 MW/2 MWh battery energy storage
– An expanded microgrid with intelligent controls and fast load shed capability
– Upgrades to the site’s electrical distribution system
– A new 800 HP steam-turbine driven air compressor.

About Ameresco

Ameresco Inc (Ameresco) is a provider of comprehensive renewable energy services. The company is a cleantech integrator, and renewable asset developer, owner and operator. It offers energy efficiency, infrastructure upgrades, asset sustainability and renewable energy solutions. The company also develops, constructs and operates renewable energy plants. Ameresco sells electricity, processed landfill gas, heat or cooling produced by its small-scale plants from renewable energy sources. It also provides consulting services, enterprise energy management services, and sale of solar PV energy products and systems. The company serves federal, housing authorities, state and local governments, healthcare and educational institutions, and commercial and industrial customers in North America and Europe. Ameresco is headquartered in Framingham, Massachusetts, the US.


All publicly-announced smart grid projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is 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.