Sorry I cannot help DFuerstenberg - our XLT is not equipped with Solar. Have you tried calling he Factory at (574) 522-3693? That would be the only suggestion I could offer - Sorry!

BamaBob, i saw a while back where you have responded about the 2018 Berkshire XLT solar prep. It was helpful, but does not help with my situation. I am looking for someone who has knowledge on this particular coach. The specifications say: Solar panel controller w/roof prep. I have talk Randy Alvine and he did not know much about it. Do you know where the controller is supposed to be? What amp it is prewired for? Also, a recommendation of the wattage we need.