We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › If your around-the-house to-do list includes an ambitious DIY electrical project, be it ...

Cars, trucks, RVs, and motorhomes run dual 12-volt batteries for various reasons. Depending on how you wire a two-battery 12-volt system, the result can be a 12-volt system or a 24-volt system—or even ...