Turning the key to discover nothing but a dead battery isn’t fun. But it happens. Inverters, coolers, radios, warning strobes, laptops, battery chargers, printers and other necessary accessories ...

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 ...