Design of a two axis sun tracking system is much more complex compared to one axis. Tracking the sun could be accomplished by either running algorithms integrated to system or using photoresistances. In this study, mathematical formulation of sun tracking system using photoresistances and its mechanical components, is derived. A new sun tracking system is proposed considering the results of calculation. The system capable of moving in two axis tracks the sun from sunrise to sunset as sunlight is always normal to its surface. So, it profited from sunlight optimally. System stops during cloudy weather or after sunset and so inessential power consumption is prevented. Moreover, consumed energy by the motors providing movement of system is minimized by the new system. Designed two axis sun tracking system is compared with a fixed system and it is observed that 30 % more electrical energy is produced annually.

Abstract-In this study, we investigated the efficiency of our own two-axis solar tracking photovoltaic system which designed by us according to a fixed system. The system's energy consumption was minimized by using tipper motor in the two-axis solar tracking system. Both systems were mounted in the same place to compare two-axis tracking system's efficiency with fixed system's efficiency fully and used the same breed panels, charge regulator, measurement device and battery. It was observed that Two-axis motion system efficiency was more than fixed system 31.67% over an annual average. This efficiency was measured on some days up to 70% during the winter months and up to 11% during the summer months.

No abstract

No abstract

No abstract