1. Detect the solar street lamp controller. Red indicates charging, flashing indicates full charge, yellow indicates insufficient charge and cannot be used normally. At this time, it is necessary to test the battery voltage of the solar street lamp. If the battery is normal, replace it with a new controller. If it is normal, it is basically determined that the controller is broken. If the light is not on, check whether the wires fall off.
2. If the controller fault is eliminated, the next step is to check whether the solar panel can be charged. Generally, it cannot be charged, but it usually occurs in the form of voltage and no current. At this time, check whether the connection of the battery panel is well welded and whether the aluminum foil on the battery panel has current. If not, the battery panel can be basically determined to be damaged. If there is current above the battery panel, be careful that it is covered by snow and cannot be recharged.
3. The battery is also a fault prone link The batteries used by many manufacturers are not waterproof. Once they enter the water, the positive and negative electrodes of the battery will be short circuited, causing voltage instability. During the test, carefully observe the change of battery voltage with the discharge depth. If it cannot work normally, replace it in time.
4. Finally, check whether the circuit is damaged. If the insulation layer is worn and the current is transmitted through the lamp pole, the lamp tube will be short circuited and the bulb will not work normally
