Retractable solar roofs made from flexible, glass-free PV panels can be used to charge electric vehicles in areas where snow is common. What if solar roofs could fold and bend to adapt to changing weather conditions?The world's largest foldable solar roof system in Uetendorf, Switzerland The roof, the size of 3 football pitches, was constructed by dhp Technology and unveiled in Uetendorf, Switzerland, adding a dimension to renewable energy The launch of the world's largest foldable solar roof system in. Inaugurating the world's largest foldable solar roof system in Uetendorf, Switzerland, marks another step forward in integrating renewable energy into existing sites. The Uetendorf structure exemplifies a unique combination of extensive area coverage, infrastructure integration, and dynamic. Uetendorf, Switzerland--A solar roof system in Uetendorf, Switzerland, Installed by dhp Technology, covering over (20,000 m^ {2}) (about three football fields) and generating enough power for 700 homes, sets the world record for the World's Largest Foldable Solar Roof, according to the WORLD. Looking for the best foldable solar panel to power your adventures? Whether you're backpacking in the wild or prepping for an emergency, having reliable, portable solar power can make all the difference. Swiss startup Dhp Technology is part of the ABCD-Horizon consortium, which includes Swiss energy company Aventron, BG Consulting Engineers, and Cargo Sous.