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A comment on Large-scale ‘sand battery’ goes online in Finland. Parent comment

Re:Large-scale ‘sand battery’ goes online in Finland by com2kid on Thursday July 07, 2022 @01:54AM (#32010393)
The ceramic lining of a water heater cracks due to thermal stress over time.

Pure stainless steel water tanks don't have this flaw, but they aren't they common.

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Re:Large-scale ‘sand battery’ goes online in Finland by lazide on Thursday July 07, 2022 @10:19AM (#32014443)
That is what the anode is there for, to be the sacrificial corroding element.

Depends a lot on how corrosive/nasty the water is in an area though. Some are just nuts.

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