Multi-level inverter

The embodiments of the invention disclose a multi-level inverter which is disposed between an input DC power supply and a load. The voltage of the input DC power supply is E. The input DC power supply may be one solar battery panel array, or one energy storage device, such as a rechargable battery, fuel battery, etc. The multi-level inverter includes a DC input unit, a first bilateral switch, a second bilateral switch, a third capacitor C and an inverter unit.