[Carl n Susan]

While the hydraulic pump is now effectively wired from the battery to the 80 amp breaker, the other line from the left 50 breaker goes to the fuse panel. If you have severally depleted your batteries and the converter tries to apply a maximum charge, that 50 amp breaker, which may have been weakened over time, may trip. It is most noticeable if using a generator to supply coach power. The gennie will ramp up RPM until the CB opens. Then it drops to idle until it closes. It keeps doing this up and down RPM process repeatedly. Stick your head in the basement near the left breaker and you will hear the CB clicking on and off.

Benn there, done that and have the T shirt to prove it.