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Most PV panels don't fail, there are panels that have been in the field for over 60 years now that are still working perfectly, but they are all mono crystal panels, the poly crystal panels are also good, it's the thin film panels that break down in sunlight... the fact that they are flexible is also a draw back because electrical connections don't like to flex, so light hail can dent the thin film and break an electrical connection.
Crystalline panels tend to be laminated behind safety glass (like a car windshield) so they hold up much better.
If you are going to install them on an RV or other type of trailer then having a grid intertie option might be a good idea, that way when the trailer is parked at home you can plug it in to the house and back feed to the house, or if you have a garage or shed that you want electricity to use it to power that building, they are going to be producing electricity whenever it's sunny out so why not put them to use? also a rack that can have the angle adjusted will help a great deal in boosting your output while parked.
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