Pumped hydro is great but it requires very specific topologies (you need a large lower reservoir or a high flow river below the dam to have water to pump back u

Pumped hydro is great but it requires very specific topologies (you need a large lower reservoir or a high flow river below the dam to have water to pump back up), it’s even more rare than good hydro locations, and completely artificial PHS à la Taum Sauk county are nearly unique. Worldwide, Switzerland is the main user and beneficiary of PHS relative to its electric capacity. Total it’s China, Japan, and the USA, they’re the only countries breaking 2 figures (in GW of generating capacity).