this post was submitted on 11 May 2025
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A German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Meters (farmingdale-observer.com)
submitted 9 months ago by Dadifer@lemmy.world to c/science@lemmy.world
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[–] Libra@lemmy.ml 4 points 9 months ago

If you read the article it includes this line:

The idea is relatively simple: hollow concrete spheres are installed at a depth of several hundred metres.

The pressure is needed to drive the turbine, cause just gently-flowing water isn't going to cut it.