Solar Street Light Not Working: What Should You Do?

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Solar Street Light Not Working What Should You Do

Unlike ordinary street lights, whose problems can be related to the whole grid, if a solar street light fails, all you need to consider is the light itself. Common problems with the solar street lights include: solar street light not working at all, flickering, turning on during the day, sensors not functioning, etc. Read this passage and learn easy ways to find the problems and fix them effortlessly!

Solar street light not working: what should I inspect?

Controller troubleshooting

During the day, observe whether the controller indicator light is in charging status. If not, the controller may be damaged. When you are sure that neither the light source nor the battery are damaged, disconnect the negative terminal of the solar panel. The light should light up in one minute. If it does not light up, the controller may be damaged, and you need a new one.

Light source

Check whether the lamp beads are securely welded and whether any lights are missing. Check to see if the lamp head is fully bright after resoldering the loose lamp beads to the circuit board. Replace the lamp beads that are still not lit.



Is the solar panel’s surface free of dust or other extraneous objects?

Are there any buildings or trees obstructing the street lights?

Is the solar panel facing the south? If it is facing another direction, the sunlight may not be enough.

Are there other light sources above the panels? If there is, you should take them off, because they will make the solar street light charge all the time.


After testing using a multimeter, if you find the battery’s voltage exceeds the rated voltage, the battery is functioning properly. If it is less than the rated voltage, think about whether wet days are to blame for any power outages. You need to replace the battery if it is not because of the rainy weather.

Solar panels

Check whether the connection to the solar panel is tight and if there is anything blocking the panels. If the voltage detected by the voltmeter is unstable or there is no output voltage, the solar panel needs to be replaced.

Flickering street lights: what to check?

Low battery power

Insufficient battery power in solar street lights will make the voltage unstable, making the lamp flicker. The battery should be charged for about 4-6 hours a day, so if it is only charged for 2-3 hours every day because of the rainy weather, it is normal to see the lights flicker. The aging of the battery will also cause its capacity to decrease, and the power will be consumed too quickly to ensure stable lighting.

Check the wiring

Another cause of flickering solar street lights may be the wiring. Reasons that cause the lights to flicker are the poor contact at the interface of the circuit and the worn out energized metal material inside the circuit. You need to replace the worn circuit with a new one in time.

Are the LED lights working normally?

Make sure there are no loose lights and that the lamp beads are securely welded. You can fix the lights that are not functioning by resoldering them, and If they are still not bright, you need to replace them. When there are too many broken beads, you need to replace the entire board or the lamp.

Why are my solar lights coming on during the day?

If the solar panel is covered by heavy snow, dust, etc., the output voltage of the solar panel will be lower than a certain value, and the solar street light will be triggered to light up.

Loose connections or broken wires between the solar panel and the battery will prevent the storage or release of power. Therefore, we need to check whether the connecting cable is intact and whether the connection is tight. If you find there is a problem with the cable, you can try to reconnect it or replace it with a new one.

For the solar street lights that are light-controlled and time-controlled, in the summer when the daytime is longer, they may keep lighting on after dawn. If so, you only need to shorten the set lighting time.

If the photocell is particularly sensitive to light, it may misjudge the light on rainy days, cloudy days, etc., causing the light to turn on during the day. You can change the circuit resistance to reduce sensitivity.


Solar street light not working is the most common problem with solar street lights. To solve this problem, we can first make sure that the surrounding area is suitable for the street lights to work normally, and then check the components of the solar street lights one by one, as well as the wire connection. You can do the same thing when you find the solar street light flickering or turning on during the day. To keep the maintenance process safe and simple, it is recommended to contact professionals or producers to offer help. You can also find us to learn more about the problems with solar street lights and how to find lights that are not likely to fail!

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Victor Guo

Victor Guo

Lead electrical engineer with 17+ years of experience designing electrical street lighting systems, monitoring electrical-related work at site, and discussing proposal and lighting implementation options. Bachelor’s degree in electrical engineering. Knowledgeable in LED lighting design, project management, safety and compliance.
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