Semi Flexible solar panel installation on RV roof no holes. How to install semi flexible solar panels on RV roof no holes roof mount, charge controller & hide wiring. Semi Flexible Solar panels easy way to install on RV roof, charge controller and hide wires, wiring, Semi flexible solar panels charge RV battery. No holes, you can install semi Flexible Solar panels on your RV roof and charge controller. It is easy to do and fun at the same time. Great way to charge your batteries, or battery. Dependable way to charge your RV battery or batteries. This is a simple DIY project that you can do. Bonus is there is no drill hole in the roof.