Polar Night Energy

Polar Night Energy, founded in 2018 by Tommi Eronen (M.Sc., Power Plant Engineering) and Markku Ylönen (Ph.D., Applied Mechanics) in Finland, is a leader in high-temperature thermal energy storage systems, specializing in its innovative Sand Battery technology. Headquartered in Tampere, the company focuses on decarbonizing the energy sector by enabling the shift from fossil fuels to renewable energy sources like wind and solar. The Sand Battery stores clean electricity as heat in sand or sand-like materials (e.g., crushed soapstone), offering a sustainable, reliable, and cost-effective solution for industrial processes and district heating networks.