Multiplus+Multi RS Solar

Good day everyone.
I have a Victron Multiplus II 48V - 8000VA - 110A, cerbo gx, and 2 batteries of 280 A/h. I want to increase the power of my system by 4-5 kW, and connect solar panels. Is it realistic to do this with Victron Multi RS Solar 48V - 6000VA - 100A - MPPT 450/100? Because with parallel connection, you will probably need Multiplus II 48V - 8000VA - 110A and for example SmartSolar MPPT RS.