Compressed Air Energy Storage

The rapidly increasing penetration of intermittent renewable energy on grids worldwide and volatility of load profiles are encouraging demand for long duration energy storage. Aside from pumped hydro, compressed air energy storage (CAES) is the only commercial long duration storage technology to have been deployed at utility scale. As a result, demand for traditional underground CAES that can be deployed at bulk scale, which has been dormant since 1991, will pick up meaningfully over the next few years.

The unique siting requirements of traditional underground CAES, however, present substantial development risk and limit the technology