Read this article today. reusing old mine shafts and a counterweight in similar concept to pumped hydro. Solves 2 problems at once.
https://www.abc.net.au/news/2024-10-31/abandoned-outback-mines-revived-by-stored-solar-renewable-energy/104527590 (https://www.abc.net.au/news/2024-10-31/abandoned-outback-mines-revived-by-stored-solar-renewable-energy/104527590)
We'll have cheap power in no time! :cheers: