A battery storage project aimed at adding more carbon-free power to California’s electric grid is about to launch in the San Diego area.

EnerSmart, a renewable energy company based in San Diego and Boulder, Colorado, has signed a $20 million order with Eos Energy to install 10 facilities of 3-megawatts each that will employ zinc battery storage technology. Each of the projects will supply enough energy to power about 2,000 homes.

Seven of the 10 storage sites will be located in San Diego County and EnerSmart plans to have each one up and running by the end of the year.

The deal will provide at least 30 megawatts of utility-scale battery storage capacity to the grid. Over the next 24 months, EnerSmart has an option

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