Key facts
- Europe's energy storage capacity lags behind solar and wind power additions, creating grid vulnerabilities.
- The EU plans to increase its energy storage capacity to 200 GW by 2030.
- Finland's Polar Night Energy has deployed the world's largest sand battery in Pornainen.
- The sand battery can store energy for extended periods, unlike lithium-ion batteries which store for about four hours.
- The Finnish sand battery project has reduced greenhouse gas emissions by nearly 70%.
Europe is facing a critical energy storage deficit, hindering its transition away from fossil fuels and increasing vulnerability to energy crises. While the EU is expanding renewable energy sources like solar and wind, the capacity to store this energy has lagged, leading to market volatility and reliance on imported gas. Lithium-ion batteries, the dominant technology, have limitations in storage duration and are subject to supply chain vulnerabilities controlled by China.
In response, Polar Night Energy has developed a sand battery, a novel energy storage solution that uses sand as its storage medium. The world's largest sand battery, commissioned by Loviisan Lämpö in Pornainen, Finland, has the capacity to meet a significant portion of the town's heating needs. This technology offers a promising alternative to lithium-ion batteries, as it does not rely on rare earth materials and can store energy for longer periods, potentially addressing seasonal storage needs.
Officials claim the sand battery project has reduced the town's heating network emissions by nearly 70%. While not a sole solution to Europe's energy storage challenges, this innovation represents a step towards greater energy resilience and sustainability through diversification of storage technologies.