This is really only interesting if you have one multi or multiplus already and then a few years later, decide to buy another...........
Victron units cannot be paralleled unless they are identical in hardware
and also in software
release, even though there is some leeway with the software
When paralleled, some flexibility and redundancy is lost
and if any unit fails you could lose your shore or generator
power as the AC is passing through the unit.
But there is a bit of a workaround that worked for me.....
I ended up using the multi as input into the multiplus... Both with their own remote panels
so amps can be regulated... and a bypass switch possibility for the multiplus when on shore power
This gave me the flexibility to use both chargers at the same time or individually...To be able to have up to (2x2.5kw) 5kw through the inverters if needed, a max of (2x70a) 140 charging
amps and to be able to bypass the multiplus shore power
management if on a stable shore power circuit.
This also gives a redundancy backup in case one of the units stops working.
This setup enabled me to use 2 inverters that are not the same with many of the benefits of the paralleled system with more redundancy and flexibility.