Abstract: This paper aims at automatically monitoring and controlling the position of the solar panel based on intensity of light falling on the photo sensors. The system also detects the available phase in a three phase power supply and automatically switches to the active phase. In the absence of power in all of the phases, power is procured from the solar charged battery. This ensures a constant supply of power, 24 hours a day, 7 days a week. The whole operation is governed by a PLC. The PLC used is Honeywell ML50.

Keywords: Inverter; phase detection; photovoltaic cell; solar energy; solar power generation.