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Here's a working sand battery in Finland.
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Here's a working sand battery in Finland. Heated to 500°C, it'll store heat for up to three months. This one heats all the town's municipal buildings, uses no chemicals, it doesn’t degrade and won’t catch on fire.
Seriously cool tech!
Finnish City Inaugurates 1 MW/100 MWh Sand Battery - CleanTechnica
A 1 MW/100 MWh sand battery in now in operation in southern Finland where it is supporting the local district heating system.
CleanTechnica (cleantechnica.com)
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