The utility model relates to a need not to hand over many level photovoltaic inverter of direct current sensor belongs to electricity generation, transformer or distribution technical field. This dc -to -ac converter includes inverter controller, MPPT controller, direct current step up unit, many level inverter unit, trapper, the direct current steps up unit, many level inverter unit, trapper establishes ties in proper order, inverter controller's control end links to each other with the controlled end of many level inverter unit, and the controlled end that the control end and the direct current of MPPT controller stepped up the unit links to each other, inverter controller's communication end links to each other with the communication end of MPPT controller, and inverter controller's voltage signal input links to each other with voltage transformer's output. The utility model discloses a high frequency harmonic wave weight that produces is eliminated to the trapper on inverter circuit for generating set does not have the high frequency harmonic wave weight when being incorporated into the power networks the power supply.