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

Re:Giant 'sand battery' holds a week's heat for a whole town by turtlebits on Wednesday March 13, 2024 @11:50PM (#39700420)
You can DIY this on the cheap by connecting solar panels directly a $10 hot water heating element and burying it in sand. You will need to pair the right spec element with your panels

No charge controller, inverter or battery needed.

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Re:Giant 'sand battery' holds a week's heat for a whole town by scotty79 on Thursday March 14, 2024 @06:15AM (#39702092)
Heating element from pyrolytic oven would be better.
[ Parent | on HN ]