Capable of storing 100 MWh of thermal energy from solar and wind sources, it will enable residents to eliminate oil from their district heating network, helping to cut emissions by nearly 70 percent.

Credits: Unsplash; Author: @rasmusandersen;

The sand battery in Pornainen will be around 10 times larger than the one still in operation at the Vatajankoski power plant in Kankaanpää. The start-up also previously connected a pilot plant to the district heating network in Tampere city.