This 224 page how-to book will help anyone understand the 12 volt system. It covers How to upgrade, Operate and trouble shoot 12 volt electrical systems. Many RVers are frustrated with their electrical system while they are dry camping. Many RVers have undersized batteries. Many RV battery chargers produce only a few amps and fail to charge the battery properly. Managing 12 Volts explains how the RVer can solve their 12 volt problems. By the time you finish this book you will feel comfortable diagnosing your 12 volt system. The worksheets will step you through assessing your needs..