Development of an Arduino-based Data Acquisition Device for Monitoring Solar PV System Parameters

Solar photovoltaic (PV) systems operate during long time periods and produce a vast number of data. Traditional data collection employs a manual method with conventional instruments such as multimeters and thermocouples, which is a time-consuming process. Automatic-sensor based data acquisition (DAQ) systems thus become mandatory and provide quick response and accuracy in real-time instead of the manual measurement for both monitoring the PV systems performance and storing the data. In this study, an Arduino-based DAQ device has been designed, built and tested to monitor the PV system parameters of the SHS prototype. The DAQ device consists of a signal processing module, i.e., an Arduino Mega board with ATmega 2560 chip microcontroller, sensor modules (i.e., voltage, current, temperature, and humidity) a storage module using an SD card shield with an embedded real-time clock of DS1307 and a display module of LCD 20x4. The DAQ device was experimentally tested at the SHS prototype test rig equipped with a PV panel of 50Wp, a battery of 12V/24Ah, a solar charge controller of 20A, and a DC load of 15W LED lamp. The developed DAQ device works appropriately to continuously monitoring the PV system parameters such as voltage, current, panel temperature, ambient temperature, and humidity, and store them on a CSV file at 10 min interval.

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