Does HT Finland have a sand battery?

HT Finland has activated the world's largest sand battery in Pornainen, storing excess renewable energy as heat to power an entire town’s heating needs. The system cuts heating emissions by nearly 70%, using soapstone as a low-cost, long-duration thermal storage medium.

What is Finland's sand battery movement?

From backyard brainstorms to international headlines, Finland’s sand battery movement is proving that sometimes the simplest materials can offer the smartest solutions. Finland's sand battery stores renewable energy as heat using crushed soapstone, helping one town slash emissions and eliminate oil from its heating system.

Is the Pornainen battery Finland's first foray into sandy storage?

The Pornainen battery isn’t Finland’s first foray into sandy storage. In 2022, Polar Night Energy launched a smaller prototype in Kankaanpää, just as Russia cut off gas supplies. The timing made a strong case for homegrown, renewable energy solutions. Engineers and co-founders Markku Ylönen and Tommi Eronen came up with the idea in 2018.

Where is vatajankoski battery installed?

The battery, which stores heat within a tank of sand, is installed at energy company Vatajankoski's power plant in the town of Kankaanpää, where it is plugged into the local district heating network, servicing around 10,000 people.

How much energy can a polar night battery store?

According to Polar Night Energy, the battery can store enough energy to heat approximately 260 homes for a week. The system is expected to reduce heating-related emissions in Pornainen by nearly 70 percent. That equates to an annual cut of about 160 tonnes of carbon dioxide emissions.