That got me thinking about using the charge line already built in to my 7 pin bargman connector rather than punching another hole and running another wire. That means that the solar charge controller would be inline even when charging from the tow vehicle. To me, this actually seems like it might be a good idea and allow for a better, more controlled charge when hooked up [b](assuming the charge controller is large enough to handle the amperage coming from the tow vehicle's alternator).
I don't think I've run across anyone doing this [b]which make me wonder if I'm missing something.
The charge controller cannot
handle the amperage coming in from the tow vehicle's alternator, is what I've been told.
You don't mount it inside the trailer and hook it up IN SERIES
with the tow vehicle's alternator in the charge line.
There are a couple of ways this has been done by others...
Link to my Solar installation
I mount my controller inside my trailer's battery
box IN PARALLEL
with the incoming charge line from the tow vehicle's alternator.
I use a separate cable to connect the panels.
Link to Jeanne & Steve's Solar installation
They use their 7-pin bargeman connector to plug into a Solar transfer box
they built which contains the charge controller and has a connector for the panels. This keeps the tow vehicle's alternator out of the circuit
when the solar panels are in use, and the charge controller out of the circuit
when connected to the tow vehicle.