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Finland just made a groundbreaking leap in green tech. In the town of Pornainen, a massive “sand battery” developed by Polar Night Energy is turning excess wind and solar energy into stored heat. Packed with about 2,000 tonnes of crushed soapstone, this silo-sized system can heat up to 500°C, holding that thermal energy for weeks or even months while losing just 10% over time.
This clean storage solution powers the town’s district heating network and helps reduce heating-related emissions by nearly 70%. With a capacity of 100 megawatt-hours and the ability to heat 260 homes for a week, Finland’s sand battery is a big step toward its climate-neutral goal for 2035 — and a bold example of how simplicity can drive powerful sustainability.
,SandBattery ,GreenEnergy ,FinlandInnovation ,RenewableEnergy ,ThermalStorage
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