Compressed air is another of those. We still have chemical storage techniques like batteries and hydrogen. So many possibilities. Really, there's no excuse to not have 24 hrs renewable energy.

Daniel Farrugia, Tonio Sant, Daniel Buhagiar, Robert N Farrugia, Analysis of the wind and wave-induced dynamic response of a floating offshore wind turbine integrating a compressed air energy storage ...

A Toronto-based energy company has converted an old Goderich salt mine into an energy storage facility that uses compressed air instead of batteries. The company says the technology is fuel-free ...