Car charger power inverter converts direct current (DC) to alternating current (AC);the popular is convert DC 12V / 24V to AC 110V / 220V ,the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. The electrical inverter is a high-power electronic oscillator. It is so named because early mechanical AC to DC converters were made to work in reverse, and thus were "inverted", to convert DC to AC. The inverter performs the opposite function of a rectifier.