And yet batterystorage is about to overtake pumped hydro: https://reneweconomy.com.au/battery-storage-is-about-to-overtake-global-capacity-of-pumped-hydro/ http

And yet batterystorage is about to overtake pumped hydro: https://reneweconomy.com.au/battery-storage-is-about-to-overtake-global-capacity-of-pumped-hydro/ https://reneweconomy.com.au/battery-storage-is-about-to-over... Pumped hydro has been around for decades and was the goto solution for storing excess nuclear power in the sixties. So, there's a lot of it around. But it's barely growing. You can plonk down batteries just about anywhere. Engineering large water reservoirs for storing energy, is a bit more work; and not that cheap typically. And you do need the terrain to have some elevation differences. I.e. mountains.