I currently have a Victron Multiplus Compact 12/2000/80-50 120 inverter/charger c/w Victron Digital Multi Control installed in my motorhome. The battery bank consists of 4 x 100 Ah Battle Born Lithium batteries. The charger has been configured to match the batteries per the Battle Born settings.
The inverter works great for the loads I need to supply.
The charger works great when fed via an AC main...puts out the spec'd current and does a great job of charging/maintaining the batteries.
This all goes sideways when I feed the unit from my Cummins ONAN 4kW gas generator. I can only get a few DC amps of charging current flowing before the inverter/charger trips. I am in the 'Charger Only" setting on the Multi Control and the digital display dialed right down.
The "Weak AC" box is ticked in the settings file.
Help!!!!