I believe Spain has working salt storage for solar power at commercial scale.[0] [O] https://en.m.wikipedia.org/wiki/Solar_power_in_Spain https://en.m.wikipedi

I believe Spain has working salt storage for solar power at commercial scale.[0] [O] https://en.m.wikipedia.org/wiki/Solar_power_in_Spain https://en.m.wikipedia.org/wiki/Solar_power_in_Spain