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Just connect the Solar Panel Output Voltage to Analog pin of Arduino and convert that in Digital and Display result on LCD or Computer. And suppose if you want to measure up to 10 volts then you have to use the given circuitry. Fig. 3: Circuit Diagram of Arduino based Digital Voltmeter For measuring Voltage we have to follow the given Formula:
You can also check the output voltage values generated by the solar panel on the serial monitor. Use the image given below to locate the serial monitor. The final project looks like this. we have more solar projects like dual-axis solar trackers. Circuit diagrams for both of the configurations are given. You can make any one of your choices.
Voltage Measurement Voltage Measurement of the Solar Panel is very easy which is up to 5 volts. But if we want to measure more than 5 volts then we have to use some additional circuitry like Voltage Divider. This circuitry changes according to Voltage, which means How Much Voltage we have to Measure.
In the context of the IoT Based Solar Panel Monitoring using Arduino, a voltage sensor module consists of two resistors connected in series configuration. These two resistors have values of 30,000 Ohms and 7500 Ohms respectively. This configuration is specified in the program and we used a variable to hold these constants.
The microcontroller of Arduino board gets the PV panel output voltage and current which are measured by sensors and then computes the output power.
Hence, the output current of the PV panel can be formulated as the following equation: I = ( Vo*5) / 1023 The output voltage of the INA169 module (Vo) is the input voltage at an Arduino analog pin (A1), which varies between 0 and 1023.
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