Our UK colleagues spoke with some of the winners of the long-duration energy storage technology competition hosted by the government.

A 1MW battery storage system with as much as 150 hours of storage duration, using an as-yet unrevealed battery chemistry, is being deployed in a pilot by Minnesota electric utility Great River Energy.

While lithium-ion enjoys the most media and customer interest at the moment, alternative technologies for storing energy could become competitive – if investors are willing to take them on to the extent that manufacturing efforts can be greatly scaled up.