Solar street lights are mainly composed of the following five core components:

1. Solar panels: This is the energy source of solar street lights, responsible for converting solar energy into electricity. The efficiency and area of solar panels determine the amount of electricity produced.

2. Light pole: Light pole is the support structure of solar street lights, usually of iron or steel, responsible for supporting solar panels, lamps and other components.

3. LED lamps: that is, the light source part of the street lamp, LED lamps are widely used in solar street lamps because of their high efficiency, energy saving and long life.

4. Battery: It is used to store the electrical energy generated by solar panels to supply power to LED lamps at night or when there is insufficient light. At present, the mainstream battery type is lithium battery, which is favored because of its long cycle life and high energy density.

5. Controller: It is the "brain" of the solar street lamp system, responsible for controlling the charging and discharging process of the battery, as well as the switch of the LED lamp. It ensures that the battery is not charged or overdischarged, thereby extending the life of the battery and the entire system.

To sum up, solar street lights are mainly composed of five core components: solar panels, light poles, LED lamps, batteries and controllers. Each component plays an important role in ensuring the normal operation of the solar street lights.