A Company Is Building a Giant Compressed-Air Battery in the Australian Outback

Hydrostor, a leader in compressed-air energy storage, aims to break ground on a 200-MW plant in New South Wales by the end of this year. It wants to follow that with a 500-MW facility in California.

https://www.wired.com/story/hydrostor-compressed-air-battery-california-australia-energy-climate/