Solar Powered Off-Board EV Charger with Fuzzy Logic Controller

Authors:

T. Shanmukha Priya, M. Sai Krishna, D. Ravi Kiran, K. Ravi Teja, M. Madhu, D. Kalavathi

Abstract: The growing adoption of electric vehicles necessitates sustainable charging infrastructure. This paper proposes an off-board EV battery charger powered by a photovoltaic (PV) array with Fuzzy Logic-based MPPT control. The PV array serves as the primary energy source, with a high-efficiency DC-DC converter regulating PV output. The Fuzzy Logic MPPT ensures optimal power extraction under varying irradiance and temperature. The off-board charger implements Constant-Current/Constant-Voltage (CC-CV) charging strategy for safe and efficient battery charging. The off-board configuration enables high-power charging, improves safety, and reduces vehicle weight. MATLAB/Simulink simulation demonstrates 99.2% MPPT tracking efficiency, 94.5% charger conversion efficiency, and 23% faster charging compared to conventional P&O MPPT, while maintaining battery temperature within safe operating limits throughout the charging process.

Keywords: Solar PV, EV Charger, Off-Board Charging, Fuzzy Logic, MPPT, CC-CV Charging, DC-DC Converter