Abstract: The Smart Solar Energy System for Lighting and Fan Control is an eco-friendly solution designed to harness solar energy for basic electrical applications, such as lighting and fan operation. With the increasing demand for electricity and frequent power outages, this system provides a reliable and sustainable alternative to conventional power supply.

The system consists of a solar panel that converts sunlight into electrical energy, which is stored in a rechargeable battery for use during periods of low sunlight or at night. A controller regulates the charging and discharging of the battery, ensuring a safe and continuous supply to the connected loads.

Lighting is automatically controlled using a light-dependent resistor (LDR), turning on when ambient light is insufficient and off during daylight, thereby conserving energy. The fan operates based on temperature or preset conditions, ensuring comfort while minimizing unnecessary power consumption.

This system is suitable for homes, schools, hostels, and rural areas with unreliable electricity supply. It features a simple design, easy operation, low maintenance, and cost-effectiveness, making it ideal for small-scale applications. By promoting the use of renewable energy, the Smart Solar Energy System contributes to energy conservation and a cleaner, sustainable environment.

Keywords: Smart Solar Energy System, Photovoltaic Power Generation, Automatic Lighting Control, Solar-Based Fan Operation, Intelligent Energy Management, Microcontroller-Based Automation, Battery Charging and Storage, Sensor-Based Control System, Power Efficiency Optimization, Load Monitoring and Control, Sustainable Green Technology, Standalone Renewable Power System.

Downloads: | DOI: 10.17148/IARJSET.2026.13344