cewillis wrote:
srschang wrote:
You're not going to get much charging through the factory 7 pin plug. The wire from the alternator to the 7 pin plug is too small.
Right -- need a dedicated high capacity wire from an engine charge point to the camper battery(s), protected with fuses, and solenoid (or equiv) activated.
My simple circuit .
Much simpler and probably more effective is a DC-DC charger.
Modern vehicles vehicles drop the voltage from the alternator to <13.5V shortly after starting. This has is not adequate to charge a house battery. The DC-DC charger boosts that up to the proper charging voltage.
