IoT-Based Monitoring and Control of Smart Inverter System

Author

Dr. S. Arun, Gowrishankar A, Sivamani A, Ranjith AR

Abstract

 Most small inverters tell the user very little about what is going on inside them. A falling battery voltage, a heavy current draw or an overheating transformer usually goes unnoticed until the inverter trips or fails. This paper presents a smart inverter that measures, displays, protects and reports its own condition using an ESP32 microcontroller. Battery voltage, battery current, AC output voltage and inverter temperature are read from a voltage-divider module, an ACS712 current sensor, a ZMPT101B module and a DHT11 sensor. The readings appear on a 16×2 I²C LCD and are sent over Wi-Fi to a Blynk dashboard. A two-channel relay switches the inverter and a 12 V cooling fan: the fan starts when the temperature goes above 35 °C, and the inverter is isolated when the battery, current or AC reading leaves its safe range. The inverter can also be switched ON or OFF from the dashboard. A prototype with a 12 V, 4 Ah battery and a 300 W inverter was tested with a 40 W bulb, and its readings were logged on the dashboard. The unit gives local display, remote monitoring and automatic protection in one low-cost arrangement.

Keywords

IoT, smart inverter, ESP32, Blynk, relay protection, temperature-controlled cooling, remote monitoring

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References

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