Ford also puts automatic circuit breaker on charging circuit, what usually is 30 amp.
I had a situation once, when I had badly depleted camper batteries and the charging breaker would cycle on/off for long time.
I did like 3-4 hr of driving that day and was surprised that the batteries were low, before I tough what might happen and fire up generator.
Camper converter cycles on/off as well when batteries are low, so took long hours for recharging.
Now I carry additional charger to speed up house batteries recovery.
