I think Handy Bob is a bit of a curmudgeon, and part of that is driven by his frustration with installers that are clueless and either purposefully get it wrong to sell more stuff or are ignorant of the electrical facts of life in dealing with DC. Ignorance is curable stupidity goes all the way to the bone and when you add greed into the mix...
There is a thread on the iRV2 forum
http://www.irv2.com/forums/f93/solar-th ... 66571.html that HB has responded to, (long and entertaining). A number of us want to know why something works and or does not, but certainly he has lots of experience with what does, and fixing what does not, And with that credential I pay attention.
One observation the level of ignorance on the iRV2 forum is shall we say entertaining, and one of the major inputs into what to have in your tool kit is a, wait for it, "credit card"
The lack of very basic skills is appalling in trying to maintain an RV that cost more than twice what our house did. It does not help that many of them seem to be made of ticky tacky.