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.
H2 is used for many other products (steel reduction, ammonia), right now its produced from methane. If we were to replace methane with a green source (aka when green storage systems would also be a big part of the ecosystem) then we’d need to replace it or the price for anything would explode, because we can’t produce anything without steel nor ammonia.
So its not really of much value right now, but if we want to make everything CO2 neutral, then hydrogen will be expensive. So noone will just produce it and not sell it. At least that is my prediction.