Three new battery energy storage system (BESS) projects from the US that may not individually make headlines for their relative size, but nonetheless prove the value and flexibility of batteries for the grid.

NEC will be using so-called ‘liquid metal’ batteries produced by Ambri in projects that could require more than four hours’ duration of energy storage, the company announced at SPI / ESI this week.

Developer Deepwater Wind has applied to build a 144MW offshore wind farm, coupled with 40MWh of battery-based energy storage from Tesla, off the coast of Massachusetts.