108
What do hexbears think about pumped hydropower storage?
(hexbear.net)
To make solar power viable, we need a solution for overnight energy storage.
Batteries are complicated.
Do you know what isn't? Water go up. 
Is seawater too "dirty"?
I mean it also contains salt ;) as I said salt is corrosive sea water has 35 parts per thousand of salt in it and look how corrosive that is. Here we are talking about hot molten salt…