Study on Solar Radiation of Surface of the Photovoltaic System

This paper is a mathematical study for finding the amount of solar radiation on the surface of the Photovoltaic (PV) system affected due to the variation in the slope (tilt angle) of the PV system along with the background theory of the attenuation of the solar radiation. The power density is maximum when the solar moduleabsorbing surface is perpendicular to the sun and in all other cases module power is always lesser than the incident power. Hence extra addition of panels with fixed tilt is no longer economical viable when electricity demand increases. Theoretical estimation of solar radiation on the slope of the PV surface from the radiation available on the horizontal surface is evaluated and the results are presented on the basis of the data available and proposed mathematical model for the calculation of the total amount of solar radiation on tilted surface.