1. Regularly check the connection status of each circuit to see if there is any looseness or replacement. If the circuit has been in use for a long time, replace it with a brand new one. Regularly measure the voltage of the battery, with a constant voltage of 11V. If it is too high or too low, it will be detrimental to the lighting fixtures and battery panels. At the same time, it is also necessary to regularly clean the dust on the lamp. If there is too much dust on it, the brightness of the lamp will be very low.

2. Maintenance personnel should also clean the lampshade, especially when it is cloudy and rainy. They should hide the controller, battery board wires, etc. and not expose them to the outside.

Answer:The reason for the above phenomenon is that the solar controller is damaged and the circuit is in poor contact

Answer:Solar panel failure, controller malfunction, LED light source, etc