Thanks!your not really going to get much of a charge, little more than a trickle all the way back there.. but just go hot back to the battery, nice and simple.. your trailer battery also needs to be able to provide braking power in a break away situation. A charge controller would really only be recommended if your doing a dedicated line and planning on using your tow vehicle as a primary charge source.
I’m not ready to run dedicated power. We’re only out for a few days at most and the power is mostly to run a pump for a shower and maybe charging gadgets occasionally. We’re in RTT’s and typically camp where there’s lots of sun. When we arrive, we’ll setup a panel, and the trailer stays parked for the most part.
there’s no brakes on the trailer yet. It’s a m101-a2, and as much as I’d like to put electric brakes on it, I don’t think there’s anything that will work with the axle. (It was hydraulic/surge style)
I figure it’d be good to have the truck put something in the battery as we drive...if it needs it, but have never wired anything like that. I thought I might need a controller that can manage the different inputs. (Solar/alternator)
I’m planning to run a group 31 lead/acid battery.