“China built a 40-story tower that stores wind power by stacking concrete

…

Surplus wind power hoists 35-ton blocks cast from recycled concrete and industrial aggregate toward the top. When the grid needs electricity again, the blocks descend and spin the generators. The tower stores 100 megawatt-hours and can deliver 25 megawatts for about four hours, at a targeted round-trip efficiency above 80 percent, with a 35-year lifespan and no chemical degradation.”

https://boingboing.net/2026/07/06/post-china-built-a-40-story-tower-that-stores-wind-powe.html

I did a rough calculation in my head and realized you’d need around 10k blocks to do this, and that seemed like a lot, but apparently it’s what they do

https://s203.q4cdn.com/692145866/files/doc_news/CNTY/2024/Rudong-100MWh-Gravity-Storage-Project-of-China-Tianying-Inc-CNTY-Gains-Spotlight-on-CCTV-Translated.pdf

It would be much more simple to raise the weights to a mountain slope than constructing a tower/building to support them.

7 minutes ago, Externet said:

It would be much more simple to raise the weights to a mountain slope than constructing a tower/building to support them.

And if you don’t live near a mountain?