Voltfang, an Aachen-based greentech company founded in 2020, has built a focused business around one straightforward premise: electric vehicle batteries still have significant useful life left when automakers retire them, and that life is best spent in stationary energy storage. The company designs, manufactures, and operates battery energy storage systems (BESS) for commercial, industrial, and grid-scale customers — primarily using requalified second-life EV modules, with complementary new-life battery modules from automotive overproduction.
With production scaling rapidly from just 5 MWh in 2023 to 20 MWh in 2024, and a new 6,000-square-meter factory in Aachen now operational, Voltfang is building the infrastructure to become a meaningful force in Europe’s energy storage market. A €250 million partnership with infrastructure investor Palladio Partners, announced in September 2025, marks the company’s move from supplying individual commercial sites to deploying grid-connected storage at scale across Germany. For a company that started when its three founders converted a campervan using second-life EV batteries, the trajectory has been steep.
Key Facts & Figures
- Founded: 2020 (RWTH Aachen University spinoff)
- Headquarters: Aachen, Germany
- Employees: ~120 (early 2026)
- Revenue: Not publicly disclosed
- Market Cap: Private company
- Market Share: Not publicly disclosed
- 2024 Production: 20 MWh
- 2026 Target: 250 MWh annual capacity
- 2030 Target: 1 GWh annual capacity
- Total Funding: $41.2M across 4 rounds, incl. €15M Series B (2025)
- Infrastructure Commitment: €250M (Palladio Partners, through 2029)
- Certifications: ISO 9001, IEC62619, UL1973, UL9540A, UN38.3, NFPA855
Company Background & Market Position
Voltfang was founded in 2020 by David Oudsandji (CEO), Roman Alberti (CSO), and Afshin Doostdar — three engineering students at RWTH Aachen University whose initial work involved repurposing used EV batteries for a campervan. That proof-of-concept grew into a commercial operation addressing a real gap: as EV adoption accelerated across Europe, significant volumes of decommissioned battery packs with 70–80% remaining capacity were entering the waste stream prematurely.
The company operates and supplies systems exclusively in Germany and Austria today, serving a client base that includes Aldi Nord, McDonald’s, Stuttgart Airport, JET Hamburg, and various logistics operators. Voltfang has also accrued recognition within the industry, earning the ees AWARD 2022 and the DNP 2025 Sieger designation, while holding ISO 9001 quality certification.
Competitively, Voltfang occupies a distinct position. While numerous BESS manufacturers source new cells from Asia, Voltfang draws its battery supply from European automotive manufacturers, requalifying modules through proprietary testing processes. This supply chain proximity, combined with in-house manufacturing in Aachen, gives the company a differentiated cost and sustainability profile.
Manufacturing Capacity & Infrastructure
Voltfang’s production history traces a clear upward arc. The company delivered 5 MWh of storage in 2023, scaling to 20 MWh in 2024 — a fourfold increase. In August 2025, Voltfang opened the Future Fab, a 6,000-square-meter manufacturing facility located in TRIWO Technopark in Aachen on the former Next.e.GO site. The company describes this as Europe’s largest factory dedicated to second-life battery storage production.
The facility supports 250 MWh of annual production capacity by end of 2026 and forms the foundation for the company’s longer-range target of 1 GWh per year before 2031. As of mid-2025, Voltfang had requalified and repurposed over 6,900 battery modules from premature disposal.
Beyond the factory itself, Voltfang’s pipeline includes active large-scale projects: a 540 kWh system at Stuttgart Airport (with a planned 10x expansion to 5.4 MWh), and a 20 MWh / 9.5–10 MW storage facility in the Aachen/Alsdorf area, targeting commissioning by end of 2025. All manufacturing takes place at the Aachen site, using requalified modules sourced from German and European automotive supply chains.
The company also runs a Pachtdirekt program, enabling landowners and municipalities to lease land for grid-scale battery storage parks, with guaranteed lease income for at least 15 years — a model that expands Voltfang’s project pipeline without requiring it to own the underlying land.
Technology & Product Portfolio
Voltfang’s product line centers on two main hardware configurations with a shared software backbone.
The Voltfang Industrial / Commercial BESS serves business and industrial customers with systems ranging from 180 kWh capacity and 184 kW power upward, designed for peak shaving, solar self-consumption, and EV fleet charging support. Documented commercial installations include:
- Kerschgens Stahlhandel: 2.8 MWh system, achieving a 37.5% peak demand reduction (from 400 kW to 250 kW)
- Teveo Logistics Center: 750 kWh battery integrated with 749 kWp PV and 16 charging points across 20,000 m²
- Frenger Ladepark: 360 kWh battery supporting 300 kW high-power charging with only an 80 kW grid connection
The Voltfang Grid-Scale BESS (Voltfang 2 Plus) starts at 5.3 MWh capacity and 2.5 MW power output, deployed in standard 20-foot containers with IP55 protection. Systems operate from -35°C to 55°C and achieve up to 98.26% round-trip efficiency, backed by a 10-year warranty and an expected service life of 15–20 years.
On the software side, the Voltfang EMS (Energy Management System) serves as the central integration platform, connecting storage hardware to building systems and energy markets in real time. The EMS supports intraday trading, cross-market optimization, peak load management, and renewable energy integration. Voltfang also develops Venma, a more advanced energy management platform with automated optimization across multiple energy sources.
The company’s battery chemistry is primarily NMC (Nickel Manganese Cobalt) for second-life systems sourced from EV manufacturers, while newer grid-scale deployments also incorporate LFP (Lithium Iron Phosphate) cells — a chemistry offering longer cycle life and improved thermal stability, particularly well-suited for stationary storage applications. The Voltfang 3 Plus DC Block additionally supports direct DC-coupled integration with photovoltaic systems, allowing PV surplus absorption without additional conversion losses.
Strategic Initiatives & Market Context
Germany has set a national target of 100 GWh of battery storage capacity by 2030, creating substantial structural demand for the type of large-scale, domestically produced storage that Voltfang is now positioning to deliver.
The September 2025 partnership with Palladio Partners is the company’s most significant strategic development. Under the binding agreement, Palladio commits €250 million by 2029 to finance and commercialize grid-connected storage projects, with Voltfang serving as the sole operational partner — responsible for planning, engineering, constructing, operating, and maintaining the facilities. The initiative targets several hundred megawatts of combined storage capacity and is structured to attract institutional capital from pension funds and insurance companies seeking long-duration infrastructure assets.
Voltfang’s Series B funding round, closed in June 2025 and totaling €15 million (~$17.3 million), was led by Dutch deeptech investor FORWARD.one, with participation from Interzero, Helen Ventures, Daphni, Fiege Ventures, and Newberry Investments. Total funding across all rounds stands at approximately $41.2 million.
On the sustainability front, the company’s second-life model directly reduces demand for virgin lithium, cobalt, and nickel — materials with complex and often carbon-intensive supply chains. Every requalified module that enters a Voltfang system is one that avoids early recycling or disposal, and the company has framed this circular economy approach as both an environmental commitment and a commercial advantage against manufacturers dependent on new cell procurement.
Looking Ahead
Voltfang’s bet on second-life EV batteries is not simply an environmental proposition — it is a supply chain strategy. As European automakers produce increasing volumes of decommissioned battery packs, Voltfang gains access to a growing, domestically available feedstock that competitors reliant on new cell imports cannot easily replicate. Combined with the company’s in-house manufacturing, EMS software, and now a committed institutional infrastructure partner in Palladio, the building blocks for meaningful scale are in place.
The path from 20 MWh in 2024 to 250 MWh in 2026 and 1 GWh by 2030 is ambitious but grounded in confirmed factory capacity and secured investment. The Pachtdirekt land-lease model adds a low-capital channel for project origination, while the Palladio partnership provides the balance sheet support for front-of-the-meter deployments that single-site commercial contracts cannot.
Risks remain: second-life battery quality and availability are not fully predictable at scale, and European energy storage markets are attracting well-capitalized competitors. Profitability, which the company targets for 2026, has yet to be demonstrated publicly. But for businesses and grid operators seeking domestically manufactured, certified, and warranted storage backed by a growing operational track record — from Aldi Nord distribution centers to Stuttgart Airport — Voltfang has positioned itself as a credible answer to Europe’s storage capacity challenge.
