The working principle of the solar street lamp is to convert the solar energy into electricity so as to achieve lighting. On the top of the street lamp is a solar panel, also known as a photovoltaic module. During the day, these photovoltaic modules made of polysilicon convert the solar energy into electricity and store it in the battery. It absorbs solar light and converts it into electricity. During the day, the solar module charges the battery bank. In the evening, the electric energy is transmitted to the light source through the control of the controller, for people to light at night. At night, the battery provides power to the LED light source to achieve lighting.
There are several possible reasons why solar lights don't work:1. The battery is low. When the battery charge of a solar lamp is too low, the battery cannot provide enough power to the bulb, which causes the bulb to fail to light up.