LifePo4 Battery cable size to MultiPlus11

[TommyDLH]

Hello everyone, I would like to install a 12volt/2x120volt 50Amp off-grid system onto our 32-foot fifth wheel using shore power and a 4000watt inverter generator to run the system. I plan on using a 30amp off shore cable from the generator directly into the trailer 50amp shore power receptacle.

Questions;
1. What size and type of battery cables do I need to connect a LifePo4 400amp, 250amp BMS battery to my Victron MultiPlus-II 12/3000/120-50 2x120V that will be, at the very most, 9 feet apart?

2. Size of wire from Victron MultiPlus-II 12/3000/120-50 2x120V to Victron Lynx Distributor, which is approximately 4 feet apart? and

3. Size of wire and size of mega fuse from Victron Lynx Distributor to WFCO ULTRA111 Distribution Center, Model WF-8930/50 (2x120V 50amp service panel), which is approximately 3 feet apart?

I appreciate whatever assistance and expertise anyone and everyone can provide!

Sincerely,

Tom

 

[RoadTurtle]

4/0 for 250a BMS.
.
I used battery cable USA for all my large cables, and went with marine grade

 

[TommyDLH]

4/0 for 250a BMS.
.
I used battery cable USA for all my large cables, and went with marine grade

Thanks!