question

The 12V or 24V panel Voltage rating usually refers to the system Voltage if a PWM controller is employed.

You will be using an MPPT controller, so like you thought, the MPPT will do the power conversion for you. Those panels will work well for you on a 12V battery system.
You'll even have the flexibility to wire the panels all in series or all in parallel. Parallel would probably be better for dealing with shading issues.

Hi Manjo ! You won't have any problem using the mentionned solar panels, as they go through the MPPT and this one will do the conversion automatically for your setup.

Chose the correct setup either by using the VictronConnect app for the MPPT, or by using the wheel selector on the MPPT itself so it will use the expected parameters for the batteries.

Using a parallel setup for the PVs is the way to go for your setup, as it will provide more power to the MPPT as in serial (in serial if there is shading on one panel you lose a lot of power).

Michel

Thanks for setting me straight, I think I can confidently fit 4 panels on the roof. I am leaning towards 2 series and 2 parallel to keep the currents low and deal with the shading issues y'all mentioned. But running them all in parallel would be 35v 40amps, I don't think 10awg would handle that. What gauge wires do y'all recommend for a parallel connection? I guess I would need a 6 or even 4awg? And go.through a 50amp fuse.

Hi.

Please note that Victron MPPTs will only start to charge if the pv input voltage is >= system voltage + 5v. So for your 12v system you should configure your pv array to always meet that criteria.

Hi Manjo, run two cables, one per array (In my setup I do use 6mm2 twice, which can handle 32A without any problem) so one cable per array will only carry around 20Ap in the best conditions, but as the arrays will be fixed on a camper van, they will never provide such power for long periods.

I'll suggest also to connect breakers before the MPPT input, so you can disable the arrays easily if needed, and also a breaker after the MPPT, so you can disable the battery bank or inverter.

Michel

BTW: DC breakers !! The AC breakers are not adapted for DC !