Solar power supply system troubleshooting method

The country strongly advocates cleaning energy, solar energy as energy visible everywhere, is widely loved by everyone. Solar power supply systems have gradually entered everyone’s field of view. The solar power supply system has failed. How should we find a failure, how can we eliminate a fault, today Ming Guangheng Hui Xiaobian will give you some troubleshooting methods.


Digital multimeter, small (2.5mm wide) flat screwdriver, stripping pliers

Measurement instructions: [123

When the voltage is measured, the digital multimeter selection 20 volts DC voltage file is selected; the red black probe is inserted into the MAVΩ socket and the COM outlet. During the test, the red table pen is labeled 12V terminal or the bare end of the red wire; the black table pen is labeled with the bare end of the terminal or black wire. A test data collector’s power input

1, the voltage on the power input terminal of the data collector is measured. Most Campbell Data Collectors have a green power supply terminal connected to the Power in socket. (If the data collector does not power the plug, you need to find the wire from the power supply system to the power supply terminal of the data collector, and then measure.)

2, black table pen contact marked as g or battery-wiring terminal, red The table pen contact is marked as a 12V or Battery + terminal.

3, the voltage reading is greater than 11.5V, the power supply is normal; the voltage reading is less than 11V, and the problem is required to appear by the following steps.

Second to ensure system power-on

This is a common case, sometimes everyone disconnects the system power supply, and then forgets access.

1, if the power cord is not accessing the PV Carport Solar Mounting Systems, access it, allow the system to power, and repeat steps. 2, if the power has been accessed, proceed to step three.

Three measurement of the voltage of the load end on the solar charge controller

1, the positive and negative (LOAD + / LOAD-) voltage of the load end is measured on the solar charging controller, if The voltage on the charging controller exceeds 11.5V, but the voltage on the data collector is significantly lower than 11.5V, and there is a need to check the wires between them.

2, the wire is loose, the contact is poor, please turn off the power before reconnecting.

3, the wire connection is good, please take step four.

4 Check the battery voltage

1, during the measurement process, data acquisitionThe measurement reading of the load end of the solar charge controller is less than 11.5V, and the cable of the solar panel is required to disconnect the battery negative (-) terminal using a black table pin, and the red medal needle contact the battery positive electrode (+) terminal to measure the battery voltage.

2, the voltage reading is greater than 11.5V, indicating that the battery is normal, the controller may have problems, please contact Huayui technician for inspection.

3, the voltage reading is less than 11.5V, disconnect the battery, and proceed. Five measures the voltage on the solar panel

1, the connection between the solar panel and the solar charging controller is required prior to measurement. Be sure to make this measurement during the day, and ensure that the solar panel is not covered or blocked, and the measurement can be measured by the end bare wire of the solar panel power cord, with a red table pen to contact the red line end bare wire, black table pen contact black line end bare wire Measure the voltage. 2, the voltage of solar panels in direct sunlight is less than 17V, then replace the solar panel.

Test of the Six Power Supply Data Collector

Some Campbell Data Collectors have built-in rechargeable batteries and charging bases. For this type, you need to separate the data acquisition device panel to the base, disconnect the battery, and then perform the next step.

Seven measures current

1 on the solar panel, set the digital multimeter at the 10A DC current gear (based on the size of the solar panel).

Tip: To avoid spark, it is best to temporarily cover solar panels with fabrics or similar things. Measurement step: The red table pen of the digital multimeter is connected to the 10A socket

connect the red table to the positive electrode (red) wire on the solar panel

Connect the black sheet to the negative electrode (black) wire connected to the solar panel, remove the cover from the solar panel, so that the solar panel is exposed to the sun.

2, the table below shows the maximum output current of different sizes solar panels. 3, according to the time and weather in one day, your measurement may be lower than the maximum of the listed, but should be close to the value of the solar panel size. 4, when the solar panel is in the sun, if the current measurement from the solar panel is close to the maximum output current, but the controller load end voltage is less than 13 to 14V from step five, it is necessary to contact China The technical personnel further confirmed the issue.

5, if the measurement result from the solar panel current is not displayedShow that the wire connected between the solar panel or solar panel and the power supply may be damaged. The above is the relevant content of the solar power supply system fault to everyone, in order to find the cause of the fault in time, we can investigate the data collector and power supply system, and everyone follows the stepsAfter the operation, you can contact us for processing.