Abstract: “Solar- LED outdoor lighting system allows governments to illuminate remote areas without electric network. For these systems a battery is required to store energy from PV panel during the sunshine and supply the LED light during the night. This paper presents simple analytic procedure for optimal sizing of PV panel- LED light and battery combination considering radiation data. Real meteorological data are used in MATLAB to calculate system components capacity. After that, stand-alone and grid connected solar- LED system is presented in terms of optimum tilt angle and amount of surplus energy. Finally, the PV panel is oriented at optimum tilt angles for seasons and compared with energy which is obtained at annual optimum tilt angle”

Keywords: Battery sizing, LED outdoor lighting, Optimum tilt angle, Photovoltaic systems