While unusable for everyday electronics, this method works at scale and is around one-tenth of the running and manufacturing costs of using lithium-ion batteries.

Form Energy, the firm behind the project, received over $380 million in grants from the Department of Energy for projects all over the North Atlantic, of which $147 will go to the Maine battery project.

With 8,500 megawatt-hours of power at maximum capacity, the battery bank could power up to 85,000 homes for 100 hours. The battery system will have the most energy capacity of any announced in the world, Mateo Jaramillo, CEO and co-founder of Form Energy, said in a statement.

Source: World’s Largest Battery to Revolutionize Renewable Energy Storage in Maine with ‘Reverse Rusting’