Originally Posted by TheSasks
IF you installed the second battery for extra time then the house cabling is fine. If however you were putting an inverter of significant wattage (like 500watt or better) in the trailer using the existing cabling you will have issues. ANy large inverter should have the absolute shortest cables possible on the 12 volt side and be placed as close to the batteries as possible, the 115 volt output is fine over longer distances on 12 guage or so depending on the wattage of the inverter. Also how long are your 6 guage wires?
Yes, the second battery was installed for extra time and I do not have an inverter installed. The 6 gauge wires I have are only long enough to make the parallel connections between both batteries which are right next to each other; wires are roughly 12 inches or so.
From what I understand, as long as the worst case current draw on the batteries while running DC accessories does not exceed the amp rating for 6 gauge wire, I'll be fine. Anyone have an idea on worst case (refrig, television, concertone, lights, furnace, fantastic fan, H2O pump, gas detector, antenna booster, landing gear, slideout, etc..)? Obviously I would not be running everything at the same time or for very long, especially in a boondock situation.