International Journal of Scientific Research and Engineering Development

The rapid growth of electric vehicles (EVs) has significantly increased the demand for efficient, reliable, and sustainable charging infrastructure, while most existing systems remain heavily dependent on conventional grid power, leading to higher load demand and limited utilization of renewable energy sources. This paper presents the design and development of a smart EV charging station that integrates solar energy as the primary source with grid supply as a backup to ensure continuous operation. The proposed system is built around an ESP32 microcontroller, which performs real-time monitoring of solar voltage, grid availability, and charging current, and implements an intelligent decision-making mechanism for automatic source selection. A relay-based switching system is used to seamlessly transition between solar and grid power based on predefined threshold conditions, ensuring uninterrupted charging and optimal energy usage. Additionally, a current sensing module and display unit are incorporated to provide real-time system feedback and improve user interaction. The overall design emphasizes simplicity, low cost, and reliability, making it suitable for small-scale and prototype-level applications. Experimental observations confirm that the system effectively prioritizes renewable energy while maintaining stable performance under varying environmental conditions, thereby contributing to reduced dependency on non-renewable sources and supporting the advancement of sustainable electric mobility.

Mr. Dhanesh K. Barve, Mr. Rakesh Kumar S.Yadav, Mr. Ritesh C. Gabhane, Mr. Yash R. Dardemal, Ms. Sharvari M. Mundle, Asst. Prof. Mr. Shubham S. Nimbekar,"Design and Implementation of a Smart EV Charging Station with Solar Monitoring and Grid Integration using ESP32" International Journal of Scientific Research and Engineering Development, V9(2): Page(1466-1473) Mar-Apr 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.