Installing an additional battery can be an effective way to power any range of devices and appliances while keeping your primary battery at full strength.
Van users that need to power equipment or build outs may be interested in installing a second, or even a third battery to power energy-intensive features such as refrigeration, electric elevators or ramps, medical equipment, interior lighting and Wi-Fi connectivity. These services can quickly leave you without the power you need to start your engine – and, at risk of stating the obvious, being powerless and stranded is no good for business.
Separating primary and secondary vehicle functions
The rationale for installing additional batteries is that your appliances will never draw from the main battery, which you’ll need for essential features like starting your engine and powering your dashboard and headlights. A vehicle battery should never perform the work that a secondary battery should be doing.
Additional batteries are also useful in that they can power all your vehicles functions when the engine and even the vehicle are off. This is especially important for services that require you to park your van and use its appliances for long periods, which range from blood-drive vans to food trucks.
As a rule, attempt to use your primary vehicle battery for the engine and essential driving features, and additional batteries for everything else.