1 Energy-saving economy

　　First of all, each solar street light is a relatively independent system, in the installation of construction without pre-buried cables, but also without excavation of the road, saving a considerable part of human and material resources and installation costs; say power consumption, an ordinary street light a day of light time for about 6 hours, power consumption of about 2 degrees, a year needs more than 300 yuan electricity, an urban area by 300 street lights, a year will cost nearly 100,000 yuan The province will be able to use solar streetlights.

　　According to reports, the country every year 50 million new outdoor lighting, if solar lights can account for one thousandth, a year will be able to save the country hundreds of millions of kilowatts of electricity, which is equivalent to sending a 100,000 kilowatts of power station to the country.

2 Energy saving principle

2.1 How do solar panels store energy?

　　The main material for solar panels is silicon, but there are also some other alloys. When a solar panel is exposed to light, it is able to convert light energy into electricity, so that electricity flows from one side to the other. Solar panels are designed according to this principle.

　　Solar panels can generally emit electricity whenever they are exposed to sunlight or light. In order to minimise light reflection and increase the photovoltaic conversion rate, the solar panel is generally covered with a film that prevents light reflection, giving the solar panel a purple surface. In addition, the tilt of the solar panel can have a considerable impact on whether the solar street light can be effectively lighted.

2.2 How is light energy converted into electricity?

　　Solar street lights consist of four main components: photovoltaic modules, light-emitting diodes, solar cells and a controller. The photovoltaic module absorbs light during the day and converts solar energy into electrical energy, which is stored in the solar cell and discharged for lighting at night when it is dark. On a normal sunny day, under ideal light intensity, a full charge takes only 4 hours and can be guaranteed for up to 5 days after each charge is completed and 3 days of continuous cloudy rain.

　　In addition, according to different requirements, the controller can design the switch of the solar street light as light-controlled or time-controlled, not only the time of charging and discharging the battery can be controlled, the intensity of discharge can also be controlled.

　　In short, in cities where energy consumption is increasing, urban electricity consumption has become unbearable: industrial electricity consumption and domestic electricity consumption have remained high in recent years, climbing year by year, and power cuts and restrictions are more common in many cities at the peak of electricity consumption. If solar street lights can be widely popularised, people will not always have to worry about their normal production life being affected.