Fascinating I wonder how much free energy is able to actually be made by something like this?

Great that real things like this and nuclear energy are becoming trendy and mainstream!!

https://farmingdale-observer.com/2025/05/10/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/