This is a solid and up to date book (copyright 2019) for the competent DIY enthusiast who wants to add a 12 volt system to an RV, boat or van, or to understand the solar system on the mobile item you just bought! - This book will allow you to understand the equipment, layout, and installation pitfalls and tips, that make for a “semi-professional” system. Is this a totally comprehensive book? No! Your system will be like you and include some idiosyncrasies. This guide will allow you to go to salespeople, brochures, manuals and professional installers, with enough knowledge to not be a fool or waste other people’s time. - If you don’t have and use power hand tools regularly, this is not the book for you. Cough up the bucks, hand the project off to a professional installer, and don’t wake up at 3 AM in the morning, in a strange campground, with your significant other saying, “Honey, do you smell smoke?” :)