iMars SysExpert is a professional selection software for iMars photovoltaic inverter to help users complete the design of photovoltaic grid connected power generation system. The software is simple and easy to use. After three steps of editing system information, component selection and system configuration, the design of single-phase or three-phase photovoltaic grid connected power generation system can be completed, and the design report of photovoltaic grid connected power generation system is output.