الفهرس 
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Abstract
Although the photovoltaic (PV) system plays an important role to meet our needs of an electrical energy, it faces many challenges. Firstly, solar energy is available only in day time. So, electrical energy must be stored in batteries to supply electrical loads during the night. A charge controller is a device which connects between the photovoltaic (PV) modules, DC batteries and loads. This thesis proposes the design and implementation of a charge controller which is capable to protect the lead acid batteries in the PV system from overcharge and undercharge states. Moreover, this charge controller is designed to work at voltage near a maximum power point (MPP) for the PV modules. Also, the designed charge controller uses the fuzzy logic Pulse Width Modulation (PWM) control, in order to make use of the full capacity of the lead acid batteries in the system. Therefore, this proposed design improves the reliability of the PV system and reduces its total cost. Secondly, PV system represents a direct current (DC) source. So, it is not suitable for alternating current (AC) residential loads. This thesis also proposes a new simplified design with a practical implementation for a smart single phase low cost inverter, which is an effective solution to reduce the overall cost of the PV system and supply AC loads. The low cost inverter is achieved by designing a low cost control and power circuits. In the power circuit, PV modules operate near the maximum power point (MPP) and supply AC load requirements through the inverter switches. The control circuit uses a microcontroller which provides a smart system for interaction with the user and remote control and monitoring, in addition to use a digital control to maintain the AC output voltage at the required value.