Boost-type common-ground PV inverter based on quasi-Z-source and switched-capacitor

•A new boost-type common-ground PV inverter is developed by using a front-side quasi-Z-source unit to feed a switched-capacitor-based inverting circuit.•The problem of inrush charging current of capacitors is successfully solved in the new PV inverter.•The enhanced boost capability can be adjusted by controlling the duty ratio of shoot-through states.•The input current is continuous, because the input source is always connected in series with an inductor.•All switching devices used in the proposed PV inverter are rated at the same voltage.