this post was submitted on 17 Sep 2025
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Technology
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How come we can't design energy storage that lifts something heavy when there's excess power, and lets it fall to generate electricity when needed?
It's an idea that's been played with a few times, but there are many energy loss points in such a system, as well as logistics for keeping the "stack" from falling over. The best so far is pumping water up to an artificial lake, but that's still not very efficient.