IoT Based I-V and P-V Curve Analyzer system for small PV panels PART I

This paper presents an IoT Based I-V and P-V analyzer for Photovoltaic panel (PV) power up to 30W and PV open circuit voltage up to 22V. The ESP32 microcontroller generates Pulse Width Modulation (PWM) signal to the power electronic circuit and takes sample of PV’s voltage and current 82 samples to calculate I-V and P-V curve. The processed data then transmitted to the cloud server via MQTT protocol for display and further analysis. A PSIM simulation analysis is also performed to predict the analyzer operational performance in various light radiation intensities as well as PV operational temperatures.