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A comment on Giant 'sand battery' holds a week's heat for a whole town. Parent comment

Re:Giant 'sand battery' holds a week's heat for a whole town by pi-e-sigma on Thursday March 14, 2024 @04:58AM (#39701700)
Typical residential air conditioning is using 4kW of power. So your 40MJ of energy would be used up in 40MJ/4kW=10000 seconds, or just 3 hours. And its only theoretical, because it assumes 100% efficiency in storage and conversion
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Re:Giant 'sand battery' holds a week's heat for a whole town by llm_trw on Thursday March 14, 2024 @07:19PM (#39710158)
It's odd how often battery enthusiasts don't understand the difference between energy and power.
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