this post was submitted on 13 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 (libranet.de)
submitted 3 weeks ago by fu@libranet.de to c/science@beehaw.org
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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/2025/…

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[–] Simulation6@sopuli.xyz 11 points 3 weeks ago (6 children)

This is just a modified version of the pump water up a hill and generate electricity when it falls back down. There is a lot of loss in a system like this.

[–] Kache@lemm.ee 4 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

Bit off loss is fine, esp if it's storing extra "free" renewable energy that would otherwise just be thrown away/not collected

I think article directly emphasizes the hope that it's sustainable, scalable, and available. For example, pumped hydroelectric isn't as available because it needs just the right terrain of two nearby lakes separated by as much elevation as possible

[–] Simulation6@sopuli.xyz 3 points 3 weeks ago

This method needs deep water, but the more possible ways to store energy the more environments that will be good.

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