2. The discharging time becomes shorter. It is usually caused by a decrease in the battery's storage capacity. In this case, just replace a new battery.

3. The solar light is flickering. The cause of this failure might be poor circuit connection, battery power loss, or a serious decline in power storage. If the circuit is okay, then replace the battery.

4. The solar street light is all day on. Check whether the positive and negative poles of the solar panel are connected reversely. Use a multimeter to measure the voltage of the solar panel and compare it with the voltage of the other same capacity solar panel. Normally, it is the same. If the solar panel's voltage is compared smaller, means its quality has a problem. Another reason might be the solar controller doesn't have the light control function, so it cannot be light on or off automatically once it detects the sunlight.

5. The solar street light source is not fully bright. Many solar street lights use dot-matrix LED light sources. Except for the quality problem of the LED light source itself, some void-welding of the lamp beads will cause this situation. In this situation, we need to replace the corresponding lamp beads, weld firmly, or replace the entire street light head.

In addition, insufficient light at the installation site and unreasonable configuration of the whole lamps will cause serious shortening of solar street lights' life span. The installation environment should be selected reasonably and the solar street light system should be reasonably configured.

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