DESIGN AND IMPLEMENTATION OF A HIGH-EFFICIENCY SYNCHRONOUS BUCK CONVERTER MPPT CHARGE CONTROLLER USING ARDUINO

Better techniques for solar energy capture have been developed as a result of the growing need for renewable energy. Because they are environmentally friendly, sustainable, and clean, solar panels are a popular kind of solar energy system. However, elements like temperature, shadows, and the amount of sunshi ne may have a big influence on how well they work. Specialized methods known as Maximum Power Point Tracking (MPPT) are needed to optimize the energy production from solar panels. In this research, a novel solar charge controller utilizing an Arduino Uno m icrocontroller and some sophisticated control techniques is presented. The technology combines a classic approach called Perturb and Observe (P&O) with smart control features to make solar energy consumption more efficient. Using sensors called INA219, the system continually measures the voltage and current and utilizes the information to calculate the current power output. In order to maintain the system functioning near the maximum power point, the controller modifies the DC-DC buck converter's parameters based on these data. Along with a Battery Management System (BMS) to safeguard the battery, the system also offers a method for safely storing energy in a lithium-ion battery. An XL4015 buck converter, an Arduino Uno, an INA219 sensor, an RC filter, an LC D display, and a lithium-ion battery pack are among the hardware elements utilized. The experimental findings demonstrate that this device can efficiently charge the battery, extract more power, and function dependably even when the amount of sunshine vari es. The system is inexpensive, simple to put up, and ideal for research, teaching, and small-scale solar energy initiatives.The paper also identifies some practical issues, such as making sure the IJ2026V6I6-6 AE system boots up properly in low light, and proposes a voltage threshold control as a helpful remedy. The created system shows how power electronics, smart control technologies, and embedded systems may be used in renewable energy projects. keywords Solar Energy, MPPT, Arduino Uno, Perturb and Observe, Fuzzy Logic, INA219, Buck Converter, Renewable Energy, Solar Charge Controller. I.