IMPACT OF CHARGE CONTROLLER TECHNOLOGY ON BATTERY CHARGING AND SYSTEM EFFICIENCY
Abstract
The efficiency and reliability of photovoltaic (PV) energy systems are largely determined by the performance of their charge controller technology, which regulates energy flow between the solar array and the battery storage unit. This study investigates the impact of charge controller technology on battery charging characteristics and overall system efficiency, focusing on the comparative performance of Pulse Width Modulation (PWM), Maximum Power Point Tracking (MPPT), and hybrid intelligent controllers. The research analyzes how these technologies influence charging rate, state of charge (SOC), conversion losses, and thermal behavior under varying irradiance and temperature conditions. A comprehensive review of past studies indicates that while PWM controllers are economical and simple, they exhibit significant power losses especially under fluctuating environmental conditions leading to slower battery charging and reduced system efficiency. Conversely, MPPT controllers demonstrate superior performance, achieving up to 20–30% higher energy yield by continuously tracking the maximum power point of the PV module and maintaining optimal voltage current balance. Recent advancements, such as fuzzy logic and adaptive hybrid MPPT algorithms, further enhance system stability and battery lifespan by minimizing voltage ripple and thermal stress. The study concludes that the selection of charge controller technology plays a crucial role in optimizing PV system performance, extending battery service life, and ensuring sustainable energy utilization. The findings underscore the importance of intelligent control strategies in improving the efficiency, responsiveness, and reliability of modern solar energy systems.
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