[alphanumeric0]

Maybe gravity towers: https://spectrum.ieee.org/gravity-energy-storage-will-show-i...

[realusername]

That's basically a very inefficient and expensive dam, concrete doesn't cost nearly the same price as water and unlike water will break.

[Ekaros]

Gravity towers are pretty poor.

For simple math you need to lift/drop 1 tonne a 367 km to store 1 MWh of energy.

[defrost]

This is what an actual 25 MW Gravity Energy Storage facility looks like under construction in China:

https://www.energyvault.com/project-cn-rudong

Apparently you can use multiple weights in parallel ...

https://vimeo.com/647372871