Hi Victron professionals and entheusiasts,
My system consists of:
8 kWh LiFePO4 battery controlled by a CANbus communicating Batrium BMS.
12 + 5 x 365Wp AEG glass/glass panels on a SMA STP5.0
10x 365Wp AEG glass/glass panels, each connected at a Enphase IQ7+ on one phase.
Yesterday, I removed 10 pcs Enphase IQ7+ micro inverters from our roof and connected the panels over two separated strings of each 5 pcs 365Wp panels in parallel tot he Smartsolar 250/100.
With the ESS running I have 3 options now:
a) Connect all panels to the two Fronius Symo 4.0 inverters connected to the inverting AC-out of the MP2 for backup during grid failure OR
b) just add one Fronius at the AC-out and charge the batteries with the 2x5 panels connected at the Smartsollar MPPT 250/100?
c) keep the excisting SMA on grid side and use the Fronius to power my house when grid fails and accepting that the SMA will shut off during failure.
What would bet he best option?
Appreciate your opinion!