In this paper, a modified configuration of Single-Phase Seven-Level Packed U-Cell (PUC) Multilevel Inverter for solar photovoltaic system is presented & investigated for standalone operation. The Seven-Level MPUC Inverter comprises of six semiconductor switches & two DC links which generates seven voltage levels at the inverter output. The maximum amplitude of inverter output voltage is more than that of available maximum DC link value (i.e. sum of two DC link values). The voltage levels generated in the MPUC inverter is more with reduced number of components counts as compare to conventional multilevel inverter topologies like Cascaded H-Bridge (CHB) and Neutral Point Clamped (NPC). The proposed inverter finds application in PV System where green power is derived from two PV panels with different power rating and voltage rating connected to DC links. Several design considerations viz. the RMS value of inverter output voltage, switching frequency & voltage rating of semiconductor switches are taken into consideration to prove the advantages of the MPUC inverter. The simulation results of the MPUC inverter shows the appropriate operation of multilevel inverter.
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