An energy management system (EMS) is a system of computer-aided tools used by operators of electric utility grids to monitor, control, and optimize the performance of the generation and/or transmission system. In this paper, an IOT based power management system is proposed for standalone photovoltaic (SAPV) system, which involves loads that are categorized based on priorities as emergency, critical, essential and convenient. The Internet of Things (IOT) based EMS is realized to provide proper and convenient load shedding, source management, data acquisition and control of the SAPV networks. The load prediction in SAPV networks is handled using LabVIEW. The EMS is designed to diagnose the normal and overcurrent conditions in the network. During overcurrent faults, the loads are automatically disconnected and the load status at any instant is sent to the registered email. The user is able to access the remote SAPV networks, control the loads and restore the network operation using mobile app. The proposed system is validated and tested on 2-bus and 3-bus SAPV networks. © 2019, The Korean Institute of Electrical Engineers.