Finland's Polar Night to build 250 MWh sand battery for district heating provider

Only months after inaugurating the world's largest sand battery - a 1 MW/100 MWh thermal storage system - Polar Night has committed to building a project twice its size.From ESS News Polar Night Energy will deploy an industrial-scale thermal energy storage unit for Lahti Energia's district heating network in Vääksy, Finland. The sand battery will provide 2 MW of thermal output and 250 MWh of storage capacity, positioning it as the world's largest sand-based thermal energy storage system upon completion. The installation will supply heat to the Vääksy district heating network and is expected ...

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