[rheavn]

There is one positive cable that goes from the house batteries directly to the inverter shunt and then onto the inverter.  It does not so through the shut off switch.  For those with late 90's coaches this cable is very important.  The reason is that in the late 90's Newell got & installed some cabling that the insulation degraded over time.  The bare wire becomes exposed and therefore you have a condition right for an electrical fire.  PLEASE INSPECT THE CABLE  GOING FROM THE BATTERY TO THE INVERTER!  Many of us gurus had to replace ours.

Here is a picture of the cabling I removed: