A-CAES is a unique, patented grid storage solution: A-CAES provides long duration energy storage like pumped hydro but with the key advantages of flexible siting where needed by the grid and with significantly less environmental impacts. This allows A-CAES to effectively target high value grid applications such as transmission deferral and fossil fuel generation replacement. The technology offers the same services as a natural gas plant while having zero emissions using surplus electricity as fuel. A-CAES is much more cost effective than batteries at large scale and has a life of 50+ years making the asset ideally suited for the long duration energy market required for decarbonizing of electrical grids globally.