Solar street lights use sunlight as energy, and the system consists of solar cell components, LED lamp heads, control boxes and light poles. The control box body is made of stainless steel, which is beautiful and durable; the maintenance-free lead-acid battery and charge and discharge controller are placed in the control box, which is beneficial to the reduction of system maintenance costs; the design of the charge and discharge controller takes into account the complete functions (with light control , time control, overcharge protection, overdischarge protection and reverse connection protection, etc.) and cost control to achieve high cost performance.

The working principle of the system is simple. The solar cell made by the principle of photovoltaic effect receives solar radiation during the day and converts it into electrical energy for output. It is stored in the battery through the charge and discharge controller. At night, when the illumination is gradually reduced to about 10lux, the solar cell The open circuit voltage of the board is about 4.5V. The charge and discharge controller will act after detecting this voltage value, and the battery will discharge the lamp head. After the battery has been discharged for 8.5 hours, the charge and discharge controller will act and the battery will be discharged. The main function of the charge and discharge controller is to protect the battery.