Fraunhofer Wants Solar Cells On Vehicles — To Help The Grid

Fraunhofer ISE is advancing the concept of integrating solar cells directly onto vehicles as a means to alleviate pressure on Europe’s power grid. Through the European SolarMoves project, the institute and its partners have demonstrated that Vehicle Integrated Photovoltaics (VIPV) can significantly reduce electricity demand by generating power on the vehicle itself. Their research suggests that passenger cars in Central Europe could meet up to 55 percent of their annual energy needs via solar power, with this figure rising to 80 percent in sunnier Southern Europe. This approach aims to produce electricity precisely where it is consumed, without requiring additional infrastructure or space. The SolarMoves project involved extensive data collection, analysing 1.3 million kilometres driven across 23 vehicle types, from compact cars to heavy-duty trucks. The study highlights that vehicles with larger roof areas, such as SUVs, and commercial vehicles like delivery vans and trucks, are particularly suited to solar integration. For commercial vehicles, solar modules could reduce fuel consumption by powering auxiliary systems such as cooling and heating, potentially allowing the initial investment in solar technology to be recouped within two years. This presents a compelling case for VIPV in the logistics sector, where energy demands are high and roof space is abundant. Despite the promising findings, the commercial viability of solar-powered vehicles remains uncertain. Companies like Sono Motors and Lightyear, once pioneers in solar vehicle production, have struggled to bring products to market at scale. While the technology offers clear environmental and operational benefits, challenges around cost, efficiency, and consumer adoption persist. Fraunhofer ISE’s research provides valuable insights but also underscores the need for further development and market readiness before solar vehicles can become mainstream. The implications of this research extend beyond individual vehicle owners to the broader energy transition in Europe. By decentralising power generation and reducing reliance on grid electricity, VIPV could contribute to grid stability and decarbonisation efforts. Particularly for commercial fleets, solar integration could enhance sustainability while lowering operational costs. Moving forward, the focus will likely be on optimising solar cell manufacturing processes and integrating these technologies into vehicles in a cost-effective manner to unlock their full potential.