Originally Posted by rarebear.nm
As long as the batteries are contained and vented properly, the H2 should not be an issue. In any electrical application shorter is better, unless you're trying to have a voltage drop. Make sure both positive and ground wires are properly sized for the amperage involved. I would also add a battery disconnect switch and properly sized breaker in your design. I assume that batteries are still in front of the axles for hitch weight.
My tongue weight was out of control for my 21 footer. At 3380 lbs it was 710 lbs according to my Sherline scale.
So, I relocated my two golf cart batteries to about 4 feet behind the single axle. Worked like a charm.
On the wiring...it looks like they spliced in three wires into the wire feeding the converter. Looks like it will be a pain. And I would be bypassing a 30A fuse at the front of my trailer.
I am going to find a bus bar and put a fuse in line.