My shamble installer left my system unfinished and not commissioned.

I have 2x 5kw hybrid Inverter and 3x 9.5kw batteries. One inverter is showing red and third battery is not reading at all. I approached another Giv installer and he is saying hybrid inverter and 3kw AC couple inverter will work better to 7kwh charge/dischager.

Any help or Suggestions will be highly appreciated.