An inverter is an electronic device that converts low voltage (12 or 24 volts, or 48 volts) direct current into 220 volts alternating current. Because 220 volts AC rectifier is usually changed into direct current to be used, and the function of the inverter is the opposite, hence the name. In a "mobile" era, mobile office, mobile communications, mobile leisure, and entertainment. In the moving state, the inverter can meet the demand not only by the low-voltage direct current supplied by the battery or battery but also by the 220 V AC power which is indispensable in the daily environment.