In the traditional non-transformer PV grid-connected inverter systems,the additional AC-side or DC-side bypass switches are usually added into the inverters to solve the problem of the leakage current.However,the additional bypass switches increase the system cost,and also need extra driving circuits leading to complex circuit structure and complicated control.Therefore,a new solution based on the bypass capacitor is proposed to suppress the leakage current.The typical L-filter-based PV inverter is consider...