The energy demand around the globe is raising drastically due to changes in-terms of technology and industrial growth around the world. Also, due to the conventional power generation, pollution is rising. Hence there is a need of clean and reusable power generation of power, so the best solution for this is renewable energy sources. Battery management system is done by using the proposed algorithm, which will ensure power balance in the system. Converters are used to interconnect the solar and battery to DC bus link. To control the battery, state of charge and current direction of battery are considered. The sizing of the system and design of the system is analyzed in this work. And a 250W power rating system is designed according to the application need, according to the load profile and a battery management is proposed to control the battery charging and discharging. © 2018 IEEE.