Is the CS6P-250P panel applicalble to a mobile installation on a rv roof?

The panel is not specifically designed for RV use - the real issue with RV mounting is that most RV bodies flex quite a bit (even though they look pretty sturdy). If the racking is firmly attached to the body and the module is ridgidly attached to the racking, then any body flex will be transferred to the module frame. So, the racking should really be attached to the RV body with a flexible, but secure attachment. Also, no PV modules that we are aware of are design for highway use and therefore probably won't be covered by liability insurance - most people use independent single module attachments to avoid the stresses of a large rack.