A solar tracker is a device that orients a payload toward the sun. Payloads are usually Solar Panels, parabolic troughs, Fresnel reflectors,lenses or the mirrors of a heliostat. Solar Tracking Systems are a special form of mounting structures and designed to maximize the yield of the solar PV system by following the course of the sun. By following the course of the sun, the solar panel will collect energy for the longest period of the day.