Although the roof of the battery car can protect against the wind and rain, the blind spot of the rider's view will become larger after the roof is installed on the battery car, which will affect his driving. The quality of many awnings is difficult to guarantee. In addition, once a collision occurs, it is easy to cause secondary injuries. Moreover, the edge of the canopy is also very dangerous when driving, and the incident of hurting passers-by at the edge of the canopy of electric vehicles also occurs from time to time.

The act of installing the roof not only affects the safety of others and oneself, but also violates the provisions of China's Road Traffic Safety Law: the overall size, quality, braking, bell and night reflective device of non-motor vehicles should meet the safety technical standards of non-motor vehicles. Installing an umbrella or canopy on an electric vehicle is an illegal act to change the overall size of a non-motor vehicle.