[rohrmann]

The large hot wire comes from the battery and connects to the line side of the first breaker. Off the line side of the first breaker is a jumper that continues the battery feed to the line side of the second breaker on the left. Off of the load side of the second breaker is two cables, one that feeds the hydraulic pump and the other that feeds the inside electric panel 12 volt section, via the battery disconnect switch. 12 volts from the batteries feed all the 12 volt loads in the panel, but through that same line is also 12 volts from the converter that feeds the batteries when you are connected to shore power. When the cheap 50 amp bi-metal breaker starts to weaken from age and use, no amount of shore power will make it work to handle the load from the hydraulic pump. Our rig was barely 12 months old when the breaker started causing issues and I found the fix of replacing the breaker with the 80 amp breaker. We have had zero issues since the replacement and we full time. And yes, you will have to open up the holes in the ring connectors a bit to fit the larger terminal posts on the 80 amp breaker, but just connect the cables to the new breaker exactly as they are connected to the old breaker, and the new breaker will have indications showing which is the line and load side.