German start-up Voltfang is pioneering a sustainable approach to energy storage by repurposing used electric vehicle (EV) batteries into modular fridge-sized storage units suitable for homes and businesses. Voltfang officially opened its first industrial facility in Aachen, near the Belgian and Dutch borders, marking it as Europe’s largest factory dedicated to refurbishing lithium-ion batteries for stationary energy storage.
The facility processes discarded EV batteries, testing their remaining capacity and refurbishing those suitable for a “second life.” These reconditioned batteries are then assembled into large power banks that store excess energy generated by solar panels and wind turbines for later use. This decentralised storage helps stabilise the grid and reduces reliance on fossil fuels.
The company’s goal is to support Germany’s energy transition by increasing storage capacity essential for renewable energy. “We aim to ensure European energy sovereignty by enabling renewable energy production through efficient storage,” said Voltfang’s CEO, David Oudsandji.
Founded in 2020 by three engineering students, Voltfang hopes to scale production to store one gigawatt-hour (GWh) of electricity annually by 2030. This innovative recycling fits into the broader circular economy and sustainability efforts, extending battery life by up to a decade before recycling.
Germany aims for renewables to cover 80% of its electricity by 2030, but intermittent solar and wind require increased storage to manage supply during times of low generation. Although new batteries are becoming cheaper, Voltfang sees refurbished systems as a sustainable, cost-effective option that reduces raw material dependency and supports Europe’s energy independence.
As renewable energy grows, companies like Voltfang play a crucial role in transforming the energy landscape by turning old EV batteries into vital components for a cleaner, more resilient power grid.
