The present article proposes a system that implements the Maximum Power-Point Tracker (MPPT) algorithm as a rechargeable battery charger for producing maximum power from solar arrays to enhance charging efficiency. The generated power from a PV (Photovoltaic) system generally fluctuates with the change of irradiance and temperature behavior. There are some methods like MPPT which ensure optimal operation of PV system at the MPP. The present work utilizes P&O (Perturb & Observe) technique to track the MPP. This is an effective way for tracking the MPP continuously to discover when the battery can generate its highest power. In practice, the controller in the proposed system utilizes a PWM (Pulse Width Modulation) signal for voltage adjustments. These adjustments are facilitated with the help of a Buck converter that measures and enhances power according to the requirement. After all, the technology charges the battery effectively and tracks the MPP steadily. The proposed system has been validated using software simulation as well as in hardware prototype model and obtained satisfactory performance for both the cases. The chargeable battery has been used to drive a robotic exoskeleton device successfully.