BESS help US island meet energy demand


The utility will install a 6MW/48MWh battery energy storage system to meet growing energy demand on the island of Nantucket, 30 miles off the Massachusetts coast.

The energy storage system will store energy from the main grid and will work in collaboration with a diesel generator to keep the lights on in the event of failure on the main grid.

Nantucket and infrastructure upgrades

The island is connected with National Grid’s main energy network using two submarine cables. The island has over the past years relied on National Grid’s two 6MW diesel generators for energy generation in the event of failure of the two submarine cables.

However, the two 6MW diesel generators have exceeded their life span and are in need to be replaced. The utility is supposed to install a third submarine energy transmission cable to be able to meet the island’s growing energy demand over the next 12 years.

The installation of the battery energy storage system is expected to delay the need for the third submarine energy transmission cable to 15 to 20 years.

Lauren Sinatra, energy coordinator at the Town of Nantucket, commented: “We are confident that the proposed project, combined with targeted energy-saving programmes and other planned electric infrastructure upgrades, will play a transformational role in meeting Nantucket’s near- and long-term energy needs.”

Rudy Wynter, COO of National Grid’s FERC-regulated Businesses, added: “Our customers, communities, and policymakers look to us to deliver innovative solutions like this to help advance our clean energy future.”

Battery energy storage systems are amongst the latest technologies that the National Grid is piloting and implementing in approximately 30 innovation trial projects across the utility’s service territories in three US states.

National Grid says it will increase adoption of microgrids, smart grids, community solar, geothermal heating and distributed energy resources to make its grid smarter.


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