Traditional solar panels are rigid and often enclosed in tempered glass. The Renogy 100W Flexible Solar Panel is anything but traditional. Perfect for marine use or placement on top of a van or vehicle, the Renogy 100W Lightweight Solar Panel is thin and capable of flexing up to 248 degrees. At 4 pounds, this flexible solar panel weighs only a quarter of its traditional 100W counterpart. Highly flexible, this lightweight panel can easily be installed on curved surfaces. This panel can also be used for other various applications, including providing power on a boat or teardrop trailer. Mounting Recommendation: Modules must be mounted using silicone structural adhesive on the backside of the panel, grommets are only to be used for non-mobile applications. For detailed installation methods, please consult a local contractor for guidance.