A energy management system is a system of computer-aided tools utilised by operators of electrical utility grids to monitor, control, and optimize the performance on the generation and tranny system. Energy management system can also be often commonly utilised by individual commercial people to monitor, determine, and control his or her electrical building lots. Energy management system can be used to centrally control equipment like HVAC devices and lighting systems across multiple destinations, such as full price, grocery and restaurant sites.