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?
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. Object covering. If the solar panel is covered, it will also cause the solar street light to not be able to be used 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 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 is charged to 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 voltage of the solar street light battery is charged to more than 24 volts.
4. Photoresistors are particularly 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.
