Did you come right with the settings? I have a similar inverter and yes the settings are a bit odd. Try to change from sbu to ac/uitilty. If fault comes you have to switch off the inverter and restart.
What time of the day are your pictures? Are you batteries fully charged daily. What type of batteries do you have,
Anyone who can advice on what balancers to get?
I have 12x 12v batteries arranged into 3 strings of 48V battery bank. The strings are connected to busbars.