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?
1 Watt is the equivalent of moving 1Kg 1 metre in 1 second.
If you want a kilowatt - you need to move 1,000Kg 1 metre in 1 second. Or, I guess, 1Kg a Km.
Plug the numbers together and you'll see that you need a massive physical load and a huge distance in order to store a useful amount of energy.
This seems like a way different conclusion than the car * 7.3m / day guy
The secret ingredient is gravity!
Hmm