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Jun. 02, 2020




As we can see, each solar street light is an independent system-no cables connecting to electric power, but they light up when it’s dark and turn off when it’s bright automatically, seems amazing, right? So where do they get the power? From its name of solar street lights, we can learn the power is from the sun. So how can it get power from the sun? That’s the point I am going to tell you.


First of all, we need to know the main parts of solar street lights: Lamp housing, solar panel, battery, controller, LED source, switch and interior cables. So how do they work together to light up? Driver is the controller, it’s the heart of this independent system, controlling all the parts’ work. Before installation, switch needs to be turned on, to make sure the system to start work. During day time, controller turns off the LED light automatically, and solar panel start to absorb solar energy from sunshine, then convert heat energy to electric energy and then store electric energy to battery. Once battery is full charged, controller stops the work of solar panel, for protecting battery- It’s called over charge protection. Once it gets dark, controller turns on the LED light automatically and consumes the energy stored in the battery. Once battery voltage is lower than a certain volt which is set by factories, controller stops the work of LED light until there is new energy comes in and battery voltage become regular, which is called over discharge protection. Repeating with this cycle, solar street lights are working all the time within their lifetime, unless there is no enough sunshine or system problem.


Solar energy → Electric energy → Battery charging → LED Light source.


However, the convert rate for solar street lights and the battery capacity are limited. If we need lights to work 365 days each year, we usually need to set the working mode of lights as an energy saving mode. Normally, we have 3 regular energy saving mode for reference:

1.     Timing lighting control. We set lights turn on and off at a certain time, for example, turn of at 7 PM and off at 1 AM next day. Furthermore, we can turn on or off via a remote controller whenever we want.

2.     Light control with PIR sensor or microwave control. This is our regular setting for low power solar street lights. Light control means lights turn on or off according to the luminance of the day or night. PIR sensor or microwave control means during lighting time, regular power is half power but when there are objects detected by PIR or Microwave, lights turn to 100% power and return to regular power after objects leave for few seconds. Moreover, PIR sensor is detecting body temperature while Microwave is detecting moving objects.

3.     Light control with different period of time control. This is our regular setting for government projects and high power solar street lights. Different period of time control means light power is different in different period of time. For instance, we set it the first 4H-100% power (A time when there is a lot of traffic) 2H-50% power ( A time less traffic), 6H-30% (A time few or no traffic). It’s a reasonable setting, both meeting our lighting and energy saving requirements. Anyway, the time period or power can be customized by clients’ requirements.


If you need more customized working mode info., please feel free to contact us.


Editor: Chloe Chen, Email: chloe@alishine.net, Whatsapp/Wechat: (+86) 13425163151, www.alisolarlight.com