“Construction begins on energy storage system relying on gravity” TL;DR: Fancy embedded video boast: 1 mi deep shafts w/500 to 5,000 ton weights for 8 & 160 MW-hr. Reality: test only 17 yard deep & 250 kW with no actual kW-hr listed.https://techxplore.com/news/2020-09-energy-storage-gravity.html …
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Also, its important to have a sense of scale here. The energy stored by lifting a mid sized car off the ground 10 feet is about 400 Watt hours. That's enough to power a small window sized AC for about an hour. Or about as much energy stored in a small shoebox sized battery.
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