[redneck]

.

https://ecomodder.com/forum/attachme...1&d=1567886880

Found it...


Energy Vault

https://www.greentechmedia.com/artic...ergy#gs.1qyw7e

A full-scale Energy Vault plant, called an Evie, would look like a 35-story crane with six arms, surrounded by thousands of manmade concrete bricks, weighing 35 metric tons each.

That version doesn't exist yet; the company has only built a demo unit at one-seventh scale, completed in June in Switzerland. The demo is used for testing to hone the design.


Once constructed, a fully charged plant will stack the bricks around itself in a Babel-like tower; to discharge, the cranes drop the bricks down, generating power from the speedy descent. The standard configuration delivers 4 megawatts/35 megawatt-hours of storage, which translates to nearly 9 hours of duration if discharging at full capacity

.





>