In order to answer this question, we need to understand lamp working principle. The basic principle of solar street lamps is that solar cells convert solar radiation energy into electricity during the day, which is stored in the battery by intelligent controller. At night, the battery starts to discharge and supply power to the lamp.
For solar street lamps, it is necessary to meet lighting requirements on continuous rainy days for a long period. There are three main points which is helpful to achieve this goal. First, improve the conversion efficiency of the solar power. On the one hand, we can choose solar panels which have higher conversion efficiency per unit area. On the other hand, we can increase the area of the solar panels, that is, increase the overall power of solar panels. Second, increase the capacity of the battery.On rainy days, solar energy cannot be continuously supplied, thus the solar street lights need a large capacity battery to store electricity and enable discharge power in a stable and sustainable manner. The third point is from the technical perspective, which is intelligent power regulation technology. The solar street lights should automatically sense the recent weather conditions, and rationally plan the discharge power.