As can be shown, the electrolytic capacitors on the dc input side can be exchanged for film capacitors of small capacitance. Hence, the problems of short lifetime and large volume of the ac module inverter system can be solved. The effectiveness of the proposed inverter is confirmed through simulation and experimental results. Improvement of conversion efficiency can be expected by utilizing the low–loss switching devices and revising the modulation method, and those will be the important task in this kind of power decoupling technology.