Finland has just deployed the world's largest sand battery—an innovative energy storage system that stores heat using only sand. Created by Polar Night Energy in partnership with Loviisan Lämpö, this battery can hold thermal energy at up to 600°C (1112°F) for months, providing clean heat to homes and buildings even during the harsh Nordic winters. By using surplus renewable electricity to heat the sand, the battery eliminates the need for fossil fuels in district heating systems. This breakthrough showcases how simple natural materials can solve complex climate challenges—and it may soon inspire similar zero-emission heating solutions across the globe. #SandBattery #RenewableEnergy #CleanTech #ClimateSolutions #FinlandInnovation