Solar Energy Management System is the most important in order to determine how effectively the power generated from renewable sources are distributed. The system decides when to use the energy stored in the battery, that is whenever the power generated from the commercial electricity grid is very low then the switching action takes place, switches to the solar grid. If the energy generated from the solar panel is sufficient then power supplied as usual as the commercial grid otherwise controlling action takes place. The energy stored in the battery is always compared with the preset levels and if it is low then it communicates with control room to take necessary steps. According to the energy levels in the stored battery the controlling of devices takes place. If the energy level is below the first preset level then the power that goes to the least priority devices are automatically shut off and the high priority devices are run and if the energy is below that then the next priority devices are shut off and allows to run only the highest priority devices giving a signal to take the necessary actions. The power monitoring device has three power sockets to measure the power consumption of devices and GPRS network module, that can transmit the status of the battery and receives the control signals to control the power through the devices. Fig.1 shows the basic block diagram for intelligent and efficient distribution system consisting of microcontroller unit, relay control unit; GPRS communication; user interface, power sensing unit (energy meter) and power supply exist in the system. The energy meter measure the power consumption, consisting of a CT sensor converted to a current value which can handled in the MCU. The renewable energy management system manages the generated power and battery charging conditions in the solar power generator. The power management methods are of two types, efficiency oriented and user oriented. In the efficient method the generated power and the battery charging conditions are transmitted to the smart power management system and it is compared with the power consumption data stored in the MCU.
In this paper we proposed a user oriented method to run the devices by setting the priorities and run the device having highest priority for a long time compared to the devices having least priority, which increases the efficiency in the point of user. The block diagram in fig.1 having three sockets is nothing but three loads. The intelligent system efficiently distributes the power generated from the solar panel to these prioritized loads depending upon the status of the battery