Solar panels are the most popular sustainable way of using rooftops. Unfortunately, they are often too heavy for many existing buildings. This will change through innovation, for instance with these solar panels by Solarge, made from recycled plastic in the Netherlands. No glass, so 50% lighter than normal, developed by the Technical University of Eindhoven. They are attached to a light weight system from Next Level Solar, another 50% weight reduction in the often heavy attachment to the rooftop. Next Level Solar (Rable) is an initiative of CBM.
