Abstract: This project presents a Hybrid Energy Harvesting System that generates electrical energy using both a solar panel and piezoelectric discs for continuous power generation under different weather conditions. The 12V solar panel harvests solar energy during sunny conditions, while piezoelectric discs convert raindrop impact into electrical energy during rainfall. The AC output from the piezoelectric discs is converted into DC using bridge rectifiers and combined with the solar output to charge a 3-cell lithium-ion battery through a buck converter. An ESP32 microcontroller monitors the battery voltage using a voltage sensor and uploads real-time data to the ThingSpeak cloud platform for remote monitoring and analysis. The system also includes a secondary buck converter to power the ESP32 and a 12V LED bulb as a load. This project provides a low-cost, eco-friendly, and IoT-based solution for efficient renewable energy harvesting and smart energy monitoring.

Downloads: | DOI: 10.17148/IJIREEICE.2026.14549