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A comment on Nuclear is back on the table for a green future. Parent comment

Re:Nuclear is back on the table for a green future by qsdf38100 on Thursday June 16, 2022 @03:17AM (#31763322)
It’s actually not a good idea at all. When you do the math ( or rather the physics) gravity batteries need so much mass and height to compete with other technologies that it’s just not worth it.

Now if you use water, pipes and pumps, instead of solid materials, now we’re talking. It’s called pumped hydro storage and is the number one grid scale storage in the world.

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Re:Nuclear is back on the table for a green future by ncmncm on Saturday June 18, 2022 @12:46AM (#31787328)
Hint: pumped hydro is, exactly, a gravity battery. A gravity "flow battery", if you like.

It is #1, just now, because a lot already existed. They cost a great deal to build, back when. New ones would cost as much, but a small variation is much cheaper, not needing a dam or a watershed.

A small variation on a bad idea can be a very good idea.

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