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In recent years, with the rapid development of the solar power industry, the scope of photovoltaic applications is gradually expanding, and various new photovoltaic products are emerging. In lighting street lamps, solar street lights, which unify technology and design, are widely used in many areas. However, during the use of solar street lights, there are times when they light up during the day. What causes solar street lights to illuminate during the daytime? Here, we will provide a detailed introduction.
Reasons for solar street lights lighting up during the day:
1. The solar panel is not charging the battery through the controller during the day.
Controller detection: A red light on the controller indicates charging; if the red light is flashing, it means the battery is fully charged and the controller is charging with a pulse of low current.
Solar panel: If the connection of the solar panel is not secure, it may not charge properly. Typically, this is indicated by a voltage (as tested with a voltmeter), with the normal open-circuit voltage being above 17.5V; however, there is no current. This phenomenon may be due to poor connections of the solar panel’s wiring (such as cold solder joints or loose connections). The method of troubleshooting involves opening the black cover on the back of the solar panel to directly test the voltage and current with a meter. If no current is detected from the aluminum foil of the solar panel, the panel needs to be replaced.
2. The controller may burn out if the positive and negative terminals were connected incorrectly.
The above information outlines the reasons why solar street lights illuminate during the day. I hope this article is helpful to you. If you have any questions, feel free to leave a comment, and we will respond promptly.
