Installing DC-DC Charger for Lithium Battery Isolation
I am installing a Renogy 20-amp DC-DC Charger to isolate the lithium batteries in the trailer from the tow vehicle’s LA batteries. My plan is to run 4-gauge wire from the vehicle battery to an Anderson power pole connector at the rear bumper (with a 30-amp fuse in the positive line). I will connect the lines into the trailer to the charger input, and then run lines from the output to the positive and negative bus bars.
I will disconnect the positive and negative lines that come in through Bargeman 7-pin connector and cap them.
I know I will not get much charging from this system, but I will get some. I am not running one of the larger chargers (40 or 60 amps) because I am not sure the computer-controlled alternator in my 2014 F150 Ecoboost could handle a larger load. Mostly I just want the isolation.
Anybody see any issues with this plan or lay-out?
2004 Airstream Classic 28 "Willard"
2014 Ford F150 FX4 Ecoboost