and environmentally friendly [1]. It is considered less expensive when compared to the diesel generators that run on fossil fuels, which are highly polluted [2][3]. Especially in areas that do not have access to electrical energy sources, as well as in agricultural areas that need irrigation. Renewable energy is one of the most important renewable sources of energy. They are available and especially present inareas that are exposed to solar radiation throughout the year [4][5]. The surplus energy generated from solar cells can be used later. This energy can be stored by one of the basic storage methods available at the present time, such as batteries. This is one of the main and important storage methods which depends on it to store the excess energy. The stored energy is used in times of night and in cloudy weather [6]. In the solar energy system, the maximum energy can be obtained by studying the electrical properties. It depends on obtaining the maximum energy through the correct orientation of the solar cells. So that the solar radiation falling on the solar cells is vertically as possible to take advantage of it in obtaining the maximum energy. By studying the current and at maximum power by studying the different tilt angles. Egypt is among the countries

A zero-crossing detector (ZCD) is one type of synchronization method. An impulse is generated by the ZCD circuit when the AC sine wave crosses zero. The width of this impulse circuit has a bad effect on the working of other circuits. The width of this impulse is dependent on the elements used. The circuit output will be studied by generating two complementary pulses for the inverter. ZCD circuit facilitates the integration of photovoltaic (PV) power systems with other systems. The proposed design can be a good choice to allow connection for different sources for certain loads. Such as in the case of isolated load or microgrid feed by different distributed generators, such as synchronous generator (diesel) and PV. There is a big challenge to choose high-quality elements of the ZCD circuit to generate the accurate impulse, leading to higher performance of the used system. So, this paper will study two elements. Transistor 2N3904 and optocoupler 4N27 are used and the obtained results are compared and analyzed to choose the suitable one. The system used is designed once based on the transistor and then with an optocoupler. Finally, the results obtained from the different designs are compared and analyzed. The proposed system is simulated based on Proteus software and the corresponding results are clearly depicted with detailed analysis and compared with an experimental prototype that is accurately created. It is found that there is a good agreement between the simulation and the experimental results, which inform the quality of the designed system.