I have a Freelander 20cb and use a Renogy portable unit that I added the mating connector to. On the 20CB, the whole solar prep is a Furrion connector and a fuse and wire running to the house battery. I think the fuse is 10amp and there is no controller. I bought matching connectors on-line somewhere (don't remember where now). Added one to my Winnebago too for trickle charging the batteries from the panel.
2016 Coachmen Freelander 20CB
2007 Winnebago Journey 39K