rajkumar.b I have the same error F59 with only 5 PV modules. The inverter seems to be working fine (PV input = 185V) and randomly, without any apparent cause, it reports 600V on the PV input, 28.6A current, 6.4kW input power, 70V battery voltage and 300A charging current. The weather is cloudy... The inverter was working fine for 3 years