I asked a local company who has very competently done similar work on my previous vans, to put a solar panel and reversing camera onto my brand new van. He said that the minute he put a hole in the van, I could say goodbye to any warranty, and that I should go back to the dealer I bought if from. When buying the van, I was alarmed at the high charges they had quoted for these simple jobs, and felt I could get it done much cheaper. Can the the dealer really hold such sway, surely a competent installer could safely do such simple jobs? Should I go to an auto electrician, or would the same position remain?