Currently, the market has many offers for the supply of special street lights (LED), with built-in solar panels.
Figure 1. Autonomous street illumination
Figure 2. Led lamp with battery and solar panel
The main essence of the autonomous work of street lamps from the sun is that special solar cells convert solar energy into electrical energy. On the chain, the electric charge enters the accumulator where it accumulates up to a certain level. In the daytime, illumination is not required, so during the daytime, the battery continually charges, and at night - on the contrary - street illumination works, but does not receive energy from outside and so for long years of service. Street illumination on solar panels uses in its arsenal a special convector or in other words a converter that allows you to charge the battery (battery).
A special controller measuring the illumination in the dark turns off the convector and turns on the LED illumination element, respectively, during daylight the controller turns off the illumination and connects the convector to charge the battery.
Thanks to unconventional power sources of luminaires, it becomes possible to use them in places where it is impossible or expensive to conduct a power line. The main task is to keep the sun's element constantly exposed to the sun all day long, at least 80% of the time. That is why street illumination is assembled in installations ranging in height from 6 to 12 meters. The most frequently used places are motorways, illumination of city streets, coasts, embankments, illumination of country houses, temporary construction sites, sports facilities, illumination of buildings, illumination of park landscapes, etc.