Why do solar street lights dawn?

If the street light is light during the day, first check the controller, the controller's red light indicates that it is charging, the red light flashing indicates that the battery is full, and the controller is charging with a pulse of small current. If the connection of the solar panel is not very strong, it can not be charged normally, which is usually shown as voltage, and the normal open circuit voltage is above 17.5V; But there's no current. This phenomenon is that the line of the panel is not connected, and the troubleshooting method can be directly after the black electrical cover behind the panel is opened, and the voltage and ammeter are directly used to detect the data.

1: Object cover if the solar panels are covered, it will also lead to the normal use of solar street lights, snow coverage, and dust coverage. When these covers cover the solar panel, the output voltage of the solar panel will be below a certain value, and the solar street light will be triggered.

2: photoresistor is particularly sensitive to light, the resistance is large when the light intensity is weak, and the resistance value decreases as the light becomes stronger. By sliding the rheostat can find a balance point, in the strong light, the photoresistor value is small. The use of photoresistors has certain disadvantages. The photoresistor has relatively high installation requirements, and it is easy to miscontrol in rainy and cloudy days.

3: Solar panels convert solar energy into electricity, the stronger the light, the weaker the light output light is lower. The output voltage of the panel can be used as a basis to turn on the street light when the voltage is lower than a certain degree, and turn off the street light when the voltage is higher than a certain degree.

4: The solar street light controller shows the undervoltage state, and the light is not on after dark, but the battery voltage has exceeded the undervoltage value, indicating that the battery has power. After the battery drops to this voltage point, the controller turns off the power supply and stops discharging, mainly to protect the battery from excessive discharge and affect the subsequent use of the entire equipment. Only when the charging voltage is charged to 24V(the controller default value), it will continue to discharge, the main purpose of this setting is to avoid the battery is often damaged by deep discharge. In the case of battery undervoltage, if the solar street lamp controller is not restarted, between 22.2 volts and 24 volts belong to the undervoltage state, and only when the solar street lamp battery voltage is charged to more than 24 volts, it will continue to discharge.