ABSTRACT
The spectrum of solar light which approaches earth's surface changes due to interactions of light with earth's atmosphere. It is clearly seen that the interaction of radiation with the ozone sheath significantly reduces the amount of potentially hazardous UV radiation. In order to enable better photovoltaic (PV) design and planning the global horizontal irradiance (GHI) has been defined which corresponds to the total amount of shortwave radiation received from the sun by a surface horizontal to the ground. This value includes two fluxes: direct normal irradiance (DNI) and diffuse horizontal irradiance (DIF). DNI represents the solar radiation that comes in a straight line from the sun at its current position in the sky. Solar energy is converted into direct current (DC) by photovoltaic modules. The produced direct current passes through a voltage regulator and is then stored in accumulators.
