> This seems like you either didn't understand what pumped storage is, or you've confused several related technologies. What adds to the confusion is that Germ

> This seems like you either didn't understand what pumped storage is, or you've confused several related technologies. What adds to the confusion is that Germans - OP used a common typo that hints at his native language - casually use "water power" ("Wasserkraft") both for hydroelectric dams ("Wasserkraftwerk") and pumped storage ("Pumpspeicherkraftwerk"). It's one of these fascinating little insights in how different languages form different train of thoughts.