Alternator

Slownsy wrote:
Yes I intended to run a heavy cable to rear for charging FW, I know that the is a orange wire with 40A fuse from factory but as plugs and som of harness have been changed when right hand conversion was don. 6gage wire is often used for this here in Australia but wondering about fuse for use near alternator.
Frank

People here have had good luck with fatter wires back to their slide-in truck campers, and also by attaching the wires to the alternator instead of the battery.

For trailers, you are pretty much onto a loser there. Even with fat wires you can't stop it charging at 13.x instead of at 14.x.

Your only real hope is to get the DC-DC gizmo mentioned, or do it by having an inverter run a battery charger, where the battery charger is doing 14.x while the input to the inverter is at 13.x. (Which is easier to arrange when parked, and hard to arrange while driving down the road.)

On the last, I had to do it parked with the inverter on the engine battery and hanging over the fender with the hood up. With the inverter on the fender top, it got too hot from engine heat and quit running.

Going down the road towing a 5er, with my portable gen in the truck bed and running a charger in the trailer from the gen, I could pass a 120v wire from the gen back to the trailer, holding it up off the road wih bungee cords, but the wind seemed to affect the gen (wind blows backwards into the back of the truck-vortex)and it would quit running sometimes.

Anyway, you can try different things, but it is mostly a loser for when driving down the road. However solar still works while driving if you have any. Watch out that solar voltage at 14.x is higher than alternator at 13.x, so the solar will kill any alternator amps--they will only add their amps if both are at 14.x or both at 13.x. Note that both at 13.x is not very useful--you want 14.x..