This varies from Region to region. The ideal tilt-angle and orientation is subject to the geographic region of the installation; the tilt, orientation, and geographic location will determine the resulting variable sun hours and angles of incidence throughout each year. Solar panels installed north of the equator (ie. northern hemisphere) will be pointed toward the South, East or West. The inclination of the solar panels and racking will depend on how far away from the equator the system is installed. The best average yield estimate would be to set the solar panels at an angle close to the location’s latitude degree.