I just got the call from CW in Biloxi. The warranty company has approved replacing the wiring in my camper. But NOT the battery....
The service agent at CW is shocked they approved the repair because they can't determine the exact cause.
The wiring is burned from the battery to the converter. The feed wires and a lot of the distribution wires. From what I could tell, the 12V feed wires were run with the distribution wires. They appear to have been loosely zip-tied to the metal cross members of the frame. It appears to me the 12V positive feed wire grounded to the frame causing the wire to get hot and catch fire. Why the protection devices at the battery didn't prevent this is a mystery.