250MWh ‘Sand Battery’ to start construction in Finland, for both heating and ancillary services

November 26, 2025 at 11:55 AM
Cameron Murray
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Technology provider Polar Night Energy and utility Lahti Energia have partnered for a large-scale project using Polar's 'Sand Battery' technology for the latter's district heating network in Vääksy, Finland.

Technology provider Polar Night Energy and utility Lahti Energia have partnered for a large-scale project using Polar's 'Sand Battery' technology for the latter's district heating network in Vääksy, Finland.

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