Development and Implementation of an Automatic Solar/Ac Power Supply Unit for a Refrigerator

This work focuses on a solar and AC power supply unit for a refrigerator. The two sources of power supply, an alternating current power supply and solar power supply, each connected to an automatic changeover used to switch power supply to the refrigerator unit. The alternating current power supply and solar power supply both charge the battery interchangeably through the inverter depending on the power source in use. The inverter unit consists of a battery used to store the solar energy needed to keep a constant supply of refrigeration to the refrigerator unit even when there is no alternating current power supply; a transformer which is used to step up the voltage supplied by the battery to match the voltage needed by the refrigerator unit to work properly and also an oscillator which is used to convert the direct current voltage supplied by the battery into alternating current voltage. This aims at maintaining constant operation of the refrigerator unit.