Off-grid truck camper - safety check

[bonuscup]

Hi all, would appreciate a review of my system for safety and correctness. This is my first attempt at building out a solar setup. It's going in a fully built out pop-top camper setup in a Tacoma designed for self-sufficient remote camping.

System includes:

2x Epoch 105ah Essential series LifePO4 batteries
3x 100W BougeRV flex panels
Victron 100 | 50 MPPT
Victron Phoenix 12 | 500 inverter
Various 12v loads included in the diagram

Questions I have:
- Is 2/0 awg wire overkill for the batteries and main lines to the switch/shunt/bus bars? It's what I already have on hand (marine grade from Bay Marine)
- I've checked a few times but any feedback on my fuse and wire gauge sizes would be helpful
- Everything will be quite compact in a bench within the camper but each component will have sufficient breathing room. There is some ventilation but I plan to add an additional vent. Anything I need to be be concerned with?
- I've opted to use MRBF fuses for everything for safety and compactness (vs. breakers) w/ them integrated into the positive bus bar but curious if this is the best route
- I read somewhere that having a Class-T fuse before the switch is needed, but seems like overkill? I'm all for inexpensive insurance though.

Many thanks

 

[SLTech23]

your 100 x 3 is not enough for 2x 100ah lifepo4 battery better use 1 x 550w or 1 x 600w if it can fit ,

 

[50ShadesOfDirt]

If I'm reading the diagram right, perhaps consider busbars for the batteries themselves ... you wouldn't have to stack ring connectors & such on battery posts, & allows for future parallel'd batteries (as shown in user guide).

In mobile scenario, (all) connections will need periodic checking for tightness to spec.

 

[50ShadesOfDirt]

Not sure why you chose these batteries over others (victron-specific comms?), but they are expensive, and the manual still reads more like trolling and/or fla guidelines. Perhaps LiTime has some variants that might reduce costs, if you find them acceptable for your needs?

I don't know enough about victron comms to know if it's best to get data at cell level, or battery level with victron shunt, or ...

Hopefully, Victron users will chime in ...

 

[bonuscup]

Not sure why you chose these batteries over others (victron-specific comms?), but they are expensive, and the manual still reads more like trolling and/or fla guidelines. Perhaps LiTime has some variants that might reduce costs, if you find them acceptable for your needs?

I don't know enough about victron comms to know if it's best to get data at cell level, or battery level with victron shunt, or ...

Hopefully, Victron users will chime in ...

I got them over Black Friday last year when they were $150 less, had great reviews, etc.

 

[bonuscup]

If I'm reading the diagram right, perhaps consider busbars for the batteries themselves ... you wouldn't have to stack ring connectors & such on battery posts, & allows for future parallel'd batteries (as shown in user guide).

In mobile scenario, (all) connections will need periodic checking for tightness to spec.

Appreciate it! Plan was to go with terminal fuses for each battery as the safest option.

 

[max2k]

Appreciate it! Plan was to go with terminal fuses for each battery as the safest option.

I think it's the best option except I also think those fuses should be 60A on each battery post and then 2 individual wires of close lengths (rated for only 60A) should connect them to the common bus bar: if I understand the diagram correctly the total current from all loads is about 100A so each battery gets only half of that.

Almost forgot- the negative wires from both batteries need to follow the same 'star' pattern- smaller 60A wires going from each to the common terminal (Smart Shunt if I'm not mistaken). This way both batteries would divide charging/discharging currents between themselves more or less evenly. Diagram shows different arrangement which might even work as one battery has shorter '+' path while another '-' so overall their 'paths' look equal.