Identification of Harmonic Current at Off-Grid PV Inverters Connected to The Load

The phenomenon of harmonic current arising from an inverter connected to the load in an off-grid photovoltaic (PV) system has been identified. The pure sine wave (PSW) and modified sine wave (MSW) inverters were used in this study and were connected to the load of incandescent and LED lamps. The Power Analyzer was used to obtain the output voltage of each inverter and the current harmonic values in the inverter and load lines. The highest percentage value of harmonic current is 72.51 % for the PSW inverter connected to the LED lamp and 49.92% for the MSW inverter connected to the LED Lamp. Further research is needed regarding the filtering method to reduce the harmonic current so that the PSW and MSW inverter could be used properly in the off-grid PV system.