Chris,
I deliberately tested the RV by turning on everything. It did cause the 40 amp breaker to trip.
I've never had a repeat.
The charging wires for the "house" battery bank came with a "hard to find" 60 amp blade fuse.
I upgraded adding a 2nd charging path with #8 wire (oem is #8) and added two 50 amp auto-reset breakers. The meter I have maxes out at 70 amps--and I've had occasion to see it drop to zero as the auto reset connects and disconnects. I have manual control over the charging solenoids, which are rated at 200 amps, contacting. The oem solenoid had burned contacts.
I've now moved to a 20 amp dc to DC charger for the "house bank" using the starter battery to feed the house bank. I chose 20 amps based on the size and duty cycle of the alternator.
