JnJnKatiebug wrote:
I don't know about your setup but my chassis batteries and house batteries are in the same compartment. Lot's of knowledgeable people here so why can't you just make a short heavy duty jumper cable out of welding lead and connect the two sets of batteries while you were driving. This looks like a way to charge them from time to time when power was not available.
That's essentially what a standard battery isolator does. The solenoid version, in particular, is pretty much exactly that: a suitably heavy connecting cable, with a switch that turns on when the engine is running, connecting the house and chassis batteries together.
Actual jumper cables with clamps and such would not be a wise idea because of the potential for human error (forgetting to remove them, installing them incorrectly, etc.); because of sparks when removing them which could be very dangerous if there was any hydrogen gas buildup in the battery compartment; and because of the possibility of them vibrating loose and grounding out, causing a high-current short circuit.
