Good day,
While doing some research into alternative ways to store extra solar energy and then subsequent research into compressed air energy storage I happened to stumble across the below website. Their claims of "90% round trip efficiencies" is quite impressive but I am also skeptical due to the generally low efficiency of most other CAES'. Has anyone had any experience with them or know if their claims have any validity?
Link to page - https://www.recor.co.za/power-storage-compressed-air-
Thanks in advance!