Design SEPIC Converter for Battery Charging Using Solar Panel

Abstract Indonesia is a tropical country and has a great potential in alternative source of solar energy. Solar energy is friendly for environmentally because it does not make pollution and is renewable energy. Using solar energy can reduce fossil energy which is this energy can’t be renewed and if used continuously it will be used up. Sunlight is solar energy that can convert the light energy into electrical energy by using solar panels. This paper presents details the design of the SEPIC Converter to Supply Electrical Energy to a Smart Lamp with Solar Energy. Sunlight energy is not always in maximum condition, so to maximize the power produced by solar panels are needed a control system to maximize the output power of converter. This experiment use 2 solar panels, each of 100 WP and arranged in parallel. The control system use PI control. The function is to generate the output voltage for battery charging. Time response of PI control is 0.6 s to according to the set point value of 14 volt for battery charging with the battery capacity is 20 Ah 12 volt. Cohen Coon method is used to find the PI control parameter. So using PI control with Cohen Coon method can make battery charging according to the set point even though solar panels has shading.