This work presents a concise overview of a new nine-level grid-connected inverter topology tailored for photovoltaic (PV) applications. The proposed inverter is a transformer-less, common-ground switched-capacitor (SC) design that completely eliminates ground leakage current while boosting the DC voltage (gain of 2) to produce a nine-level AC output. A nonlinear one-cycle control (OCC) strategy is implemented to regulate both active and reactive power flow, enabling swift dynamic response to grid demand changes. Key results from a 0.6 kW prototype validate the advantages: the inverter achieves a near-sinusoidal output with low distortion, instantaneous reactive power support (both inductive and capacitive), and a high-power density (~12.7 W/cm3), significantly exceeding comparable nine-level designs. The experimental tests demonstrate fast transient response to step changes in load and power factor without compromising waveform quality.
