Forvia Hella, an international automotive supplier, has teamed up with Tau Motors, a leader in software-driven power conversion, to create cutting-edge charging solutions as part of a strategic partnership. The collaboration focuses on developing a ‘virtually isolated Onboard Charger (viOBC)’ for electric vehicles, with plans for mass production in the next two to three years.
The viOBC eliminates the need for a transformer, which increases its power density and energy efficiency while reducing both weight and installation space requirements. This new technology also supports advanced energy management, including vehicle-to-grid integration with bidirectional charging. The partnership includes a venture investment in Tau through Hella Ventures.
ForviaHella brings significant expertise in high-voltage and power electronics, along with the capabilities to industrialize the product. Tau contributes its software-driven technology platform and specialized knowledge in power electronics, controls, and innovative product design.
“We are excited about the collaboration with Tau to develop this innovative Onboard Charger that pushes the boundaries of power density and sets new standards in charging technology. This partnership expands our portfolio of key electrification components and contributes to sustainable mobility,” said Jörg Weisgerber, Managing Director of Electronics at ForviaHella.
Wesley Pennington, Founder and CEO of Tau, commented, “This partnership merges Tau’s cutting-edge power conversion platform with ForviaHella’s global expertise in product quality and safety. Together, we’re paving the way for the next generation of high-voltage power electronics and energy management systems for a cleaner, smarter future in mobility.”
Unlike traditional charging systems, the virtually isolated Onboard Charger eliminates the need for a transformer to separate the AC grid from the DC vehicle system. This is achieved through an innovative combination of software and hardware.
Despite the lack of a transformer, the system maintains high safety standards and performs all the functions of transformer-based designs. By removing the transformer, the viOBC achieves a power density of up to 7 kW per liter of installation space. The technology also reduces the space and volume required for the vehicle’s OBC by up to 50%, while cutting its weight by around a third.
The transformer-free design boosts energy efficiency to more than 98%, leading to lower electricity costs and significant CO2 savings due to reduced weight. A prototype of the viOBC has successfully passed its technological and commercial concept tests, with series production expected to start within the next two to three years.
Forvia Hella, part of the Forvia Group, is a leading automotive technology company specializing in lighting and electronics solutions. With a strong global presence, the company develops advanced systems that enhance vehicle safety, efficiency, and driver comfort. Its portfolio includes intelligent lighting, energy management, driver assistance, and digital cockpit technologies, serving both passenger cars and commercial vehicles. Forvia Hella combines innovation with sustainability, contributing to the transformation of mobility and supporting automakers worldwide with next-generation solutions.
