Solar street lamp controllers are mostly installed in lamp shades and storage battery boxes, and generally do not enter water. However, in practical engineering cases, some of them are short-circuited because of improper installation or because the circuit boards of some controllers are not treated with three-proof paint, because rainwater flows into the solar street lamp controllers along the external wiring of the controller terminals. Therefore, during construction, attention should be paid to bending the internal connection line of the controller terminal into "U" type and fixing it. The exposed connection line is also fixed as "U" type, so that the rainwater can not get into the controller and cause short circuit. In addition, waterproof glue can be applied to the internal and external connection to prevent water.

In many practical applications of solar street lamp, solar street lamp in many places can not meet the normal lighting needs, especially in continuous rainy days and inadequate winter illumination period, in addition to the use of relatively poor quality components, another major reason is to blindly reduce the cost of components, do not design and configure according to demand, reduce the use standards of battery panels and batteries. As a result, street lights cannot provide lighting on rainy days.