Major RV dealer installations use #10 wire. It will handle what the alternator can put out.I wonder about the size of the wire if the t/d trailer bat is discharged and the wire isn't very big.. will something melt?
I would install a switch or battery isolator when not charging just in case one goes dead and kills the other battery.
I would think it would be much better to connect to the car battery because it is on the other side of the regulator form the alternator. If you are connected to the alternator, it will constantly charge the tear battery, which could be bad.
campadk wrote:I have always been told that the charge line has to have some kind of isolation device to prevent anything nasty happening to the cars electronics. Maybe its something really simple, but I've heard that it is best to get the dealer to install the manufacturers hardware so you don't void your warranty.
Guy wrote:Dear SteveH,
Could you spell that out for us dummies. Precisely how do you hook it up to the ignition? What wires go to what posts?
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