[tcfhgj]

All the cheap storage reservoir capacity is already used - from where are you going to get more?

[bryanlarsen]

All the cheap storage capacity with natural flow have been taken.

Pumped hydro doesn't need natural flow, because it uses pumps. All it needs is a height differential. Here's 22,000 in Australia alone. There are millions worldwide.

https://arena.gov.au/knowledge-bank/anu-stores-an-atlas-of-p...

[tcfhgj]

so why hasn't the storage capacity not been taken?