A new structure of single‐phase two‐stage hybrid transformerless multilevel PV inverter Transformer less inverters are becoming popular for grid‐connected photovoltaic applications due to their simplicity, reduced size, weight, cost, and higher efficiency.

A two‐stage hybrid transformer less multilevel inverter (MLI) for single‐phase grid‐connected photovoltaic power generation system (PVPGS) is presented.

The proposed topology comprises a multilevel boost converter (MLBC) and a symmetrical hybrid MLI. MLBC combines the boosting and switched capacitor voltage functions to produce self‐balanced multiple voltage levels. The proposed MLI is derived from a combination of bidirectional switches, a half bridge, and a diode‐clamped branch, which can produce only two variations in the total common mode voltage and is capable of suppressing leakage current.

It offers the advantages of scalability, reactive power capability, reduced total harmonic distortion, and filter size. The proposed hybrid transformer less seven‐level inverter is simulated in MATLAB, and experimental setup is built to validate the effectiveness of the proposed configuration