Sizing and environmental effect on photovoltaic radio repeater

This paper represents the sizing calculation of photovoltaic (PV) system as electrical power source of radio repeater system. Also it represents the annual environmental effects on PV system performance in different locations in Egypt. The solar radiation and temperature variation for the I-V characteristics, the output power, the maximum power (P_max), the open circuit voltage(V_OC), and the short circuit current (I_SC) are determined and discussed. It was concluded that the sizing calculation depends on the desired location condition mainly. The temperature variation effect for the module on P_max, I_SC, and V_OC is -0.625%/°C, 0.0662/°C, and - 0.5%/°C respectively. For the solar radiation the best season for operation the PV system is the spring. In addition for temperature variation, the best season is the winter, while the worst season is the summer for both radiation and temperature variations.