Several common reasons and maintenance methods for solar street light not turning on: 1. Possible faulty parts: (1) LED light source (2) Solar controller (3) Battery (4) Solar panels 2. Solution: (1) First check whether the wiring terminals of the lamps are loose. (2) Remove the LED solar light source and connect it to the battery or DC12v power supply to see if the light is working properly. Pay attention to the positive and negative poles. If the light does not light, it means that the LED light is faulty. The LED light needs to be replaced. (3) Measure the battery power. If it is lower than 11v, it means that the controller is in the protection state, and the lamp is fully charged before use. If it is higher than 11v, the controller is faulty and the controller needs to be replaced. Specification: LED Solar Light 40W 60W 120W 180W Solar Panel(size) 6V…