It’s about thermal storage, you don’t use table/sea salt for that, and you don’t need a lot of salt, because the salt is in a closed loop; it’s not being consumed.
But more thermal storage you want more salt you want, and it's gotta cost something, right?
https://en.wikipedia.org/wiki/Molten-salt_battery
But more thermal storage you want more salt you want, and it's gotta cost something, right?
https://en.wikipedia.org/wiki/Molten-salt_battery