Annette Höglund-Dönnes

New Capabilities

Overseeing commercial deployment of sand batteries

Polar Night Energy is building its third commercial sand battery in Vääksy, Finland: a 2-megawatt unit that will hold 250 megawatt-hours of heat. The company targets completion in summer 2027, when the plant will feed Lahti Energia's district heating network.

Updated Oct 22