National Grid, Massachusett’s electricity, and natural gas supplier, has announced a partnership with Tesla to install a battery energy storage system on Nantucket Island to power its 10,000 residents.

With its existing diesel generators nearest its end, National Grid proposed a new 6-MW,48-MWh battery energy storage system, provided by Tesla, requiring 200 Tesla Powerpacks to operate.

This move is meant to address Nantucket’s increase in electricity demand via tourism and existing lacking infrastructure, with two submarine power cables providing power to the mainland. Both are buoyed by two aging backup power diesel generators that are reaching the end of its shelf life. With the move, National Grid forecasts adding a new, expensive submarine power cable can be delayed for up to 20 years, up from its initial 12-year forecast.

“The BESS provides a very efficient and effective solution to two major energy challenges facing the island,” said Rudy Wynter, president, and COO of National Grid’s FERC-regulated businesses.  “Our customers, communities, and policymakers look to us to deliver innovative solutions like this to help advance our clean energy future.”

This project is part of a larger effort to reduce gas demand in Massachusetts, with a $4.7 million grant provided by the Department of Energy Resources to work towards solutions. $996,455 of the grant money was awarded to Tesla. Today. National Grid is also working on approximately 30 other energy projects across Massachusetts, New York, and Rhode Island in the field of smart grids, microgrids, geothermal cooling, and other innovations, serving more than 20 million people.

Nantucket is located 30 miles off of Cape Cod, Massachusetts with approximately 10,000 residents. Its a popular island known for its cobblestoned streets, whaling industry, and excellent weather albeit possessing many vulnerabilities by islands with a lack of proximity to resources.

In the island energy storage space, Tesla has also made recent headlines with its Powerpack deployment in Puerto Rico, restoring energy for hurricane-stricken residents. One Powerwall project even restored power to a children’s hospital. Also, a second project in Australia oversaw the signing of an interconnection agreement with Neoen, a local wind power company, an initiative that was the result of a 2016 power outage in the region.