The present invention relates to a multilevel inverter using a single input voltage source and a battery serial-parallel combination, and more particularly to a multilevel inverter using a single DC input voltage source 100, a single DC input voltage source 100 and a main switching unit 300 And a plurality of switching elements connected to both ends of the auxiliary circuit unit 200. The auxiliary circuit unit 200 includes a plurality of switching elements connected in series to each other, And a main switching unit 300 for determining the polarity of the multi-level output voltage in a complementary operation of the switching device through a cascaded H-bridge of the cascade type H-bridge 200 and outputting the output signal. And more particularly, to a multi-level inverter using a single input voltage source and a battery serial-parallel combination.
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