The performance and well-being of solar PV energy system are top priority to the owners and users. In light of current solar system management software usually just provides instant performance data and limited fault report, a novel performance management developed by The Hong Kong Polytechnic University (PolyU) and Electrical and Mechanical Service Department HKSAR contains artificial intelligent (A.I.) technology and able for facilitating digital twins application on solar energy system for advanced system monitoring and management with in-depth performance analysis and predictive maintenance. This talk will introduce the AI an Digital Twin as well as the applications to this Gold Medal Winning system.