Energy Products, Projects and Devices Design Aps Sun-Tracking Photovoltaic System by Vincenzo Granata, Anna Dell'Aversana and Pietro Liquori Team an innovative photovoltaic system that fully exploits sun power as sustainable energy. Like a sunflower, the panel follows the position of the sun, without external mechanisms requiring considerable energy to create the solar tracking. A CIGS layer is deposited as ink on six EAP triangles caged in Willow Glass and governed by a steel structure. It is ultra-light, ultra-thin, transparent and applying a voltage of only 4V allows stretching and bending the material, such as a muscle, to turn the panel to the direction of the sun.