Hello,
Because of reliability issues with the network in my area, I have installed an off-grid solar system (Multiplus ii 5kW + MPPT with 3kW worh of solar panels and 200Ah AGM batteries @ 48V). I'm now looking into expanding my installation with AC-coupling using a Fronius Primo 3.0-1 and ~3kW solar panels.
According to the Victron documentation about AC-coupling I have an undesized battery for this configuration (If I understand correctly, I need at least 300Ah for what I'm trying to do). I don't want to invest in more battery capacity as it's enough for my needs and the upgrade would be quite pricey. I was thinking of using a smart meter and limit the export of the Fronius to 0W. Would this solve my problems? Also, where should I place the smart meter, on the AC-in of the Multiplus or the AC-out?