This paper evaluates the operational performance of an existing microgrid (MG), which consists of on & off-grid PV systems plus the utility supply. The standalone PV system is used to keep loading on the utility supply within its safe limit. The performance evaluation of the MG is carried out in terms of energy consumption, power quality indices, and energy cost based on Egypt's energy current tariff. A simple energy management system is fully designed for MG status monitoring as well as load sharing between the grid and the standalone PV system. The data of the on-grid PV system is collected then analyzed online, and a historian trend is shown in a designed SCADA system with a reasonable refresh rate. A cost-saving secure internet connection between external clients and the main network webserver is developed to increase the reliability/operability of the newly designed monitoring system. Based on the Dynamic Domain Name System, an OpenVPN server is set up for granting access to remote clients if they match all credentials and certificates. Furthermore, to validate the designed SCADA system, a performance characterization for the on-grid PV system following international standards of yields calculations is carried out for 3 months in 2019.