The world’s largest demonstration plant for a new kind of renewable energy storage is up and running in the west of the China. Called liquid-air energy storage (LAES) the plant uses renewable electricity to compress air to extreme densities until it turns to liquid. It can then be rapidly released to power a turbine and discharge that green energy back into the grid.
This would be perfect for North Africa and Australia where there is excellent solar capability but limited water and high ambient temps (not great for batteries)
Also not great for H2!