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Solar energy is a renewable and clean energy, inexhaustible, is the inevitable trend of future energy utilization. With the extensive application of clean energy solar energy and the gradual maturity of energy storage technology, the advantages of solar street lamps in road lighting and rural lighting have gradually emerged, and it has become a trend to replace the electric street lamps with cables. This paper firstly introduces the components of the solar street lamp, then expounds the working principle and advantages of the solar street lamp, and finally introduces the application field and application principle of the solar street lamp.

Working principle of the solar street light is the solar energy into electrical energy to realize lighting, street lamp is at the top of the solar panels and photovoltaic modules, the day these made of polycrystalline silicon pv modules convert solar energy into electrical energy stored in a battery, made under the control of the intelligent controller of solar energy street lamp, solar panels after the illuminate of sunshine, absorb the solar energy light into electrical energy, solar battery components to the battery charge during the day. In the evening, the electrical energy is transmitted to the light source through the control of the controller to illuminate people at night. At night, the battery bank provides power to the LED light source to realize the lighting function.

Solar street lamps generate electricity from the sun, so there are no cables to prevent leakage and other accidents. The DC controller can ensure that the battery is not damaged due to overcharge or overdischarge, and has the functions of light control, time control, temperature compensation, lightning protection, anti-polarity protection, etc. No cables, no AC power, no electricity.