Five-level boost inverter with common ac and dc ground is an emerging topology introduced for photovoltaic applications. Despite the merit of
effective leakage current elimination, the existing topologies which are developed based on the switched-capacitor concept inherit several critical
issues such as current spikes, large capacitor voltage ripple, and discontinuous dc source current that hinder their practical implementation. This
paper proposes a novel five-level common-ground topology that not only resolves all the aforementioned issues but also provides flexible boosting of
voltage gain and enhanced output voltage quality. The proposed topology comprises two identical converters where each converter is able to
accomplish simultaneous ac voltage generation and boosting of dc-link voltage within a singlestage operation. The proposed topology and its
corresponding pulse-width-modulation technique are analyzed. Simulation and experimental results are performed to demonstrate the validity and
effectiveness of the proposed topology.