Battery
Dad put the battery on the curbside passthrough storage as it had more space. He originally thought he was gonna put buses on this side but instead used the battery disconnect and the battery shunt as points to connect multiple cables.
Not installed until after this picture, Dad added a XT60 connector so he could quick connect a solar controller for additional portable solar.
Buss Bar
On the street side, Dad put all the connectors together via buss bars. Each bar has connectors from the battery side, has connectors to the inverter with a 100a AWL fuse, a positive cable down to the battery disconnect on the coupler, and connectors to an Anderson SB175 connector for connecting a secondary battery.
Solar Controller Upgrade
The trailer came with a GoPower 30A PWM solar controller, however when Dad chose to use the Victron ecosystem for the battery shunt, it was destined to be replaced. Dad wanted a system that can accurately determine SOC for lithium batteries and the Victron shunt was highly praised. That resulted into buying a solar charger that can communicate with it. Dad decided to use the 75v/15a charger, since the roof only has a 200w panel. It is a max power point tracking charger, which is more efficient for lower watt input and combined with the VenusOS, what you are seeing in the picture above, you can control everything from the touchscreen Dad built.
Wiring was simple, since it was a direct wire to wire replacement.
The only thing dad needed was to tap leads from the “load” terminal to power the raspberry pi and touchscreen.
Impression
Overall, the system has done exactly Dad needed it to be: To have enough electrical power to ensure the refrigerator will run through the entire trip.