What is the reason why solar street lights are on during the day?

Source: SRESKY Views: 16 2020-11-26 15:13:23

        Nowadays, solar street lights are installed in urban areas. Solar street lights not only bring light to people at night but also dress up the city at night. However, some solar street lights turn on during the day, not only wastes energy but also cannot work normally at night. So what causes solar street lights to turn on during the day?

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  1. Solar panels convert sunlight energy into electrical energy. The stronger the light, the weaker the light, the lower the output light. The output voltage of the battery panel can be used as a basis to turn on the street light when the voltage is lower than a certain level and turn off the street light when the voltage is higher than a certain level.

  2. If the solar panel is covered, it will also cause the solar street lamp to be unable to use normally, heavy snow cover, and dust cover. When these coverings cover the solar panels, the output voltage of the solar panels will be lower than a certain value, and the solar street lights will be triggered to light up.

  3. The solar street light controller displays the Undervoltage state and does not turn on after dark, but the battery voltage has exceeded the Undervoltage value, indicating that the battery is charged. After the battery drops to this voltage point, the controller turns off the power supply and stops discharging, mainly to protect the battery from being over-discharged and affecting the subsequent use of the entire equipment. The charging voltage will continue to discharge only when it reaches 24V (the default value of the controller). The main purpose of this setting is to prevent the battery from being damaged by deep discharge. In the case of battery Undervoltage, if the solar street light controller is not restarted, the voltage between 22.2 volts and 24 volts is under voltage, and the solar street light battery will continue to discharge only when the battery voltage is charged above 24 volts.

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  4. The photoresistor is very sensitive to light. When the light intensity is weak, the resistance is large. As the light becomes stronger, the resistance value decreases. A balance point can be found by sliding the rheostat. When the light is strong, the photoresistor value is small. The use of photoresistors has certain disadvantages. Photoresistors have relatively high requirements for installation and are prone to miscontrol in rainy, cloudy, and other conditions.

  The above reasons for the solar street lights to turn on during the day are shared with you. In addition, there is also a less likely reason that in the rainy weather, the solar radiation absorbed by the solar panels is insufficient, and the power output is weak, and the controller will think it is dark. , It will automatically light up.