Self Build Campervan Wiring Diagram. Here is an interactive version of our wiring diagram for camper van, skoolie, rv, etc. 400 watts of rooftop solar

For most components in a van other than the inverter 12awg wire is plenty. I have used this as an example as it is the most difficult one do, anything smaller or with less switches just gets easier. Go to 17:08 for a wiring guide with diagram.