The function of the inverter is to convert the direct current to the alternating current with desired output voltage and frequency. The purpose of this project is to design single phase full bridge inverter that can contibute 120W. Souce of this inverter can be from photovoltaic or others DC supply like battery and so on that provide 36V and 4A. target of this project is can produce smooth sinusoidal output waveform with 36V 4A at 50Hz frequency. The efficiency of the circuit is about 80%. The output of the Sinus Pulse Wave Modulation ( SPWM ) is a combination of sinusoidal waveform and triangle waveform. Using SPWM technique, harmonic effect will be reduced in the single phase full bridge inverter circuit. Filter is used to modify the output waveform so that it’s smoother. PSIM was used for simulation purpose in this project.