High-gain boost-type switched capacitor nine-level inverter topology with reduced device count

This paper presents a novel quadratic boost switched capacitor (SC) nine-level inverter topology designed for renewable energy applications, particularly photovoltaic (PV) systems. The proposed topology achieves high voltage gain through a quadratic boost mechanism combined with an optimized SC network. It features a reduced number of power switches and capacitors, resulting in a lower component count, enhanced reliability, and a more compact structure. After testing with a 350 VA load, the inverter achieved a peak efficiency of 96.7%, demonstrating its exceptional power conversion capabilities. A comprehensive comparison with existing SC-type nine-level inverter topologies is provided in terms of voltage gain, switch and capacitor count, and efficiency. The results confirm that the proposed inverter offers significant advantages, making it a strong candidate for next-generation PV systems.