The Victron Quattro is the larger inverters in the Victron range.
It has 2x AC inputs for typical connection for grid and generator further on it has same features as the Multiplus.
Quattro has 2x AC outputs, which one is for backup (critical loads) and second AC output is for Non-essential loads
Parallel up to 6 inverters and can be used in three phase solutions (6 x sets) @ 180KVA
Quattro 24/5000/120-100/100 4000W Inverter/Charger