The US state of California is providing US$31 million for a long duration energy storage project combining vanadium flow and zinc-hybrid batteries, the first grant from a US$380 million package.

The funding is going to microgrid developer Indian Energy LLC for a project with a 60MWh long duration energy storage system providing backup power to sustain critical operations for the Viejas Tribe of Kumeyaay Indians in the event of a grid emergency. The Tribe is based in Southern California.