The inverter is a DC to AC transformer, composed of inverter bridge, control logic and filter circuit. In fact, with the converter is a voltage inverter process. Converter is the AC voltage of the grid into a stable 12V DC output, and the inverter is the AC output of the 12V DC voltage into high-frequency high-voltage alternating current; two parts are also used with more pulse width Modulation (PWM) technology. In foreign countries due to the higher penetration rate of the car to go out to work or travel can be connected with the inverter battery drive electrical and various tools work.