Power control unit for a vehicle

A power control unit installed on a vehicle including a first power source (150) and a second power source (140) which have respective different voltages, an inverter (102) connected to a rotary device (26) and connected to at least one of the first and second power sources (150, 140). A converter (104) is connected to the first and second power sources. A casing (110) is formed of an electrically conductive material and has a grounding terminal (112) formed thereon, wherein the inverter (102) and the converter (104) are accommodated within the casing (110), and are connected to the grounding terminal (112) through said casing