That growatt needs at least 120volts to start working, with those panels you will need 5 panels in series to reach the minimal voltage of the inverter. Vmp 29.8 * 5 in series = 149 volts. You also don't want more then five in series as you will exceed more then the 250 volt limit of the inverter. Voc @ -21c/-6f 43 volts * 5 in series = 215 volts.