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German startup Voltfang has launched Europe's largest second-life battery factory in Aachen, aimed at repurposing used lithium batteries for renewable energy storage. The facility is designed to produce enough systems to store 1 GWh of electricity annually by 2030, supporting homes and businesses with renewable energy needs. Despite the factory's potential to meet 5% of Germany's stationary storage market demand by 2030, the European battery sector faces challenges from competition and supply limitations.