Effect Difference Size of Tetrahedron Sun Tracker Based on Sensor for Energy Harvesting

This research is a new size of implementing a light sensor to detect sunlight on a dual-axis sun tracker based on tetrahedron geometry. The sun tracker is installed with different sizes of sun tracker based on tetrahedron geometry. The sun tracker can track the position of sunlight perpendicular to the solar cell which has the strongest light intensity. This study aims to energy harvesting and the Field of View generated. The method used to obtain voltage and current uses a control system with a proportional integral derivative (PID) algorithm and modifies the size of the sun tracker by adding a triangle height of the triangular tetrahedron. In addition, the light sensor used to track sunlight uses a phototransistor sensor. The result of energy harvesting is that the sun tracker using the proposed sensor collects 159.9% more energy than the previous sun tracker. The modification of the existing tetrahedron shape produces a Field of View (FOV) of 310° for the proposed sun tracker and FOV of 289.4° for the previous sun tracker.