Yes. His rule of thumb was that major items needed to be UL listed. My biggest challenge was the solar panels which are Q Cell 385s. Even though they are on a ground mount 100' + from the house and are from a major manufacturer he wanted them UL listed. Ironically the model I had quoted (G5) did not list the UL marking but the model before and after (G4 and G6) had it. I chalked it up to marketing oversight and he agreed and allowed me to move fwd.. It is a completely double edged sword with the power the local inspectors have in how they can interpret the regulations that can make it difficult for a DIYer or give someone a break. The biggest lesson I learned is to just keep to the facts and no small talk since as soon as you start talking about ideas they might like one and ask you to incorporate it and that has cost me time and $$$. Get them in and get them out... asap.