[zchrykng]

How much do those batteries cost and can they supply power for multiple days or a season if your renewable sources aren't providing like normal?

Not to mention the environmental damage from producing and disposing of batteries.

[tcfhgj]

I agree, there are better options for mass scale long term energy storage than batteries, e.g. (green) hydrogen, methane

[bryanlarsen]

Pumped hydro is currently the cheapest long term energy storage by a significant amount.

[tcfhgj]

not so cheap anymore when you want to add lot's of storage capacity

[bryanlarsen]

That's exactly when pumped hydro shines. Increasing the storage reservoir capacity is cheap. It's the turbines and infrastructure that's expensive, but that doesn't change if you're only increasing the capacity.

[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...