German CleanTech startup Voltfang secures €15 million and launches Europe’s “largest second-life battery factory”

Aachen-based Voltfang, a provider of European battery storage solutions for industrial, commercial, and grid-scale applications, has successfully closed its Series B financing round, raising €15 million.

The round was led by Dutch DeepTech investor FORWARD.One. Additional investors include existing backers such as Interzero, PT1, Helen Ventures, Daphni, Aurum Impact (the Goldbeck family office), as well as new partners like Fiege Ventures and Newberry Investments.

David Oudsandji, CEO and Co-founder of Voltfang, commented: “This financing round directly responds to the enormous surge in orders we experienced in Q1. Expanding the energy infrastructure is urgently needed across Germany and Europe, especially as we work to build resilience against external energy dependencies. We must act now to create more grid flexibility using large-scale battery storage. Doubling our company valuation in just six months is a strong signal of the market’s confidence in Voltfang’s technological relevance and growth potential.”

Founded in 2020 at RWTH Aachen University by Afshin Doostdar and David Oudsandji, Voltfang is a cleantech company specialising in high-performance European energy storage systems for industrial, commercial, and grid-scale use. Its battery systems are built using requalified EV batteries from the European automotive industry.

Customers include players such as Aldi Nord, Alba Group, Fiege Logistik, and Goldbeck.

The company is also expanding and opening a new production site in Aachen, North Rhine-Westphalia (NRW). The new facility, called the “Voltfang Future Fab,” offers substantial growth potential and enables scaling up to 1 GWh with high-performance, energy-dense storage solutions.

By expanding its production capacities, the company aims to roll out enough battery storage by 2030 to replace the Weisweiler coal-fired power plant and strengthen Germany as an industrial location.

Voltfang aims to significantly scale its production capacities and deliver an additional 250 megawatt-hours of sustainable battery storage across Europe by the end of 2026. The company will also continue developing its intelligent energy management system, Venma, which integrates AI capabilities to help businesses maximise self-consumption, lower electricity costs, and participate in energy markets.

The move into the former production halls of Aachen-based electric vehicle manufacturer Next.e.GO, with 6,000 m² in the TRIWO Technology Park in NRW, reflects demand from industrial, commercial, and large-scale storage sectors.

While Voltfang’s storage capacity in 2023 amounted to 5 MWh, it increased to 20 MWh in 2024. With this production scale-up, Voltfang aims to reduce reliance on battery storage from China and other Asian countries.

By utilizing second-life and surplus batteries from the European automotive industry, the company aims to foster the development of an independent and resilient battery industry in Germany and Europe.

Germany’s energy storage market is continuously growing, with Fraunhofer Institute projections emphasizing its significance: around 100 GWh of electrical storage capacity will be needed by 2030 and around 180 GWh by 2045.

A special advantage of the location is its proximity to other innovative local companies such as Cylib, also part of the Battery Circle Aachen, and Black Semiconductor, a pioneer of next-generation chip technology. This neighborhood fosters synergies and supports the development of Aachen as a technology hub in the field of battery technology.

Paul Pruijmboom, Partner at FORWARD.One, added: “Voltfang perfectly embodies our investment strategy: strong hardware paired with intelligent software. With their powerful and truly European storage technology, the team is tackling one of the most pressing challenges of our time – enabling the energy transition. We firmly believe that local energy infrastructure will be a key pillar of Europe’s future economic growth.”

Voltfang’s systems use high-performance, requalified battery modules sourced from the European automotive industry – contributing to energy security and a more resilient energy infrastructure.

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