Recently, CubeSat has been becoming economically attractive in many applications. As they provide cheap facilities
to validate new ideas by using the advanced technologies. Every satellite needs an electrical power supply to feed the satellite buss with needed levels of voltage and the payload (Camera). The power flow is controlled by an Intelligent Power Management System (IPMS) which contains Maximum power point tracking charger (MPPT), feedback sensors, switching control circuit and Boost-Buck converters to coordinate the flow between generation and storage units and the payload as in the CubeSat, solar panels take the role of power generation and secondary batteries serve as energy storage. The main criteria of PMS are decreasing the power consumption of the devices and feed each device with
optimal power required, send telemetry data to the station about the status of individual devices, switching between the modes of operation according to the mission and finally the main objective is increasing the life of time of the battery.