Hemi Joel wrote:
I just use a pair of 8 gauge wires from the truck battery to the camper batteries. That eliminates the voltage drop of the 7 pin and puts a nice charge into the camper batteries whenever I drive. I use a 200 amp blade switch that is mounted on the truck battery to isolate the truck battery when the situation calls for it, but that is rare.
I added dual #8 wires. When I switch to telcom jars--no more charging. I do have manual control over the 200 amp solenoids I added. The dc to DC charger was, for me, a huge improvement.