theoldwizard1 wrote:
deltabravo wrote:
Also, a major wiring upgrade will be needed.
This is how I did it
I VEHEMNTLY DISAGREE !
The whole point of a DC-DC charger is to NOT require oversized charging cables ! It boost the voltage at the RV battery to the correct voltage to charge the battery using the standard vehicle/trailer wiring !
Even with your large gauge wire, you should check the voltage at your campers battery after about 10 minutes of driving and at high idle. If the battery is say 80% SOC, the voltage at the camper battery should be >14.0V.
Wiz, the standard trailer plug is only rated for 30 amps continuous, and I don’t think it’s even good for that. I’ve seen too many of them melted to believe they can sustain 30 amps.
The manufacturers all have wire gauge recommendations based on the length of the run and the DC charger output. For any DC charger over about 15-20 amps, you will very quickly exceed the capability of the standard trailer circuit.
I would recommend following the manufacturers recommendations for the input wires and fuses to the DC-DC charger you’re installing. The instructions for the 40 amp Redarc I’m using recommend 4 awg wires for the length of my circuit, which is between 25 and 30 feet.
:):)
