I have an off-grid system with 5kw multiplus II, cerbo, 2 x pylontech US5000, smartsolar 250/70 and 6 x 550w solar panels.
I want to add and aerotermia system for heating and SHW that will requiere to increase a lot my battery capacity. As pylontech is expensive, I would like to add a second DIY 15kw battery bank with a JK Inverter BMS but Victron systems does not suport to work with 2 battery banks.
As will have to increase PV production, I will add a Fronius PV inverter with 10 x 500w solar panels
I have been told that the new hybrid Fronius PV inverters support also their own battery bank.
Can I mix multiplus II and Hybrid Fronius in AC-OUT configuration and every one of them with their own battery bank?
I want to understand that during the night, the Fronius PV inverter will use their own battery inject also power in the AC-OUT line of the multiplus for the AC loads or to charge the multiplus battery if it is not fully charged.
If this configuration works, is it better to install the largest battery bank in the Fronius or in the multiplus side?
Thanks
