Furthermore: heric inverter is also a non-isolated topology! Traditional photovoltaic grid-connected inverters all use transformers for electrical isolation to ensure personal safety, but this greatly reduces the system efficiency. Heric is a transformerless photovoltaic inverter topology. Two reverse switching tubes are added at both ends of the H-bridge arm to carry out freewheeling, so as to isolate the power grid from photovoltaic cells in the freewheeling stage.