Re:Power Worth Less Than Zero Spreads as Green Energy Floods...
by uxp on Wednesday August 08, 2018 @09:26PM
(#17721059)
There's a number of them all over the world. Surprisingly simple idea and amazingly powerful storage.
https://en.wikipedia.org/wiki/List_of_pumped-storage_hydroel...
https://www.youtube.com/watch?v=McByJeX2evM
https://electricityproduction.uk/plant/GBR1000151/