> Common sense? Unfortunately common sense isn't as common as you'd hope, and there are plenty of things which are "common sense" among amateurs which are simp

> Common sense? Unfortunately common sense isn't as common as you'd hope, and there are plenty of things which are "common sense" among amateurs which are simply untrue. > An amateur is someone who doesn't do what he does professionally, a professional is someone who makes a living with the thing they do. That doesn't say anything about their knowledge level. Professionals usually also have formal training, which means they are at least somewhat familiar with the theory behind what they are doing. PV installation is indeed a well-known cowboy industry right now, but I can assure you that an actual electrical engineer will be way more capable than a random hobbyist when it comes to actually designing electronics. Your one experience with a single PV installer does not scale to the entire industry of electronics.