1. After installing this roof, the direction of the vehicle is heavier, especially when turning. It is much heavier than the awning because it always comes in the same direction. Direction rotation is not so flexible.
2. The resistance is much greater when riding, because the whole cross-sectional area of this tent is too large, and the faster the speed, the greater the resistance. This invisibly caused great resistance to electric vehicles. How much electricity does the battery need to consume to overcome these resistances? The cruising range of the vehicle is obviously shortened.
3. There are security risks. For example, when there are vehicles around, cars or large trucks pass quickly, it is difficult to stabilize the car and it is easy to be "sucked".
This kind of car is easy to be blown down by the wind when it is windy. I don't know if you have seen it, but many cars parked on the side of the road with awnings will fall down when the wind blows.
Extended data:
Safety hazards of electric vehicles with roofs;
First, it will block the line of sight first, and when turning, the rearview mirror will not be able to see the situation behind the car clearly.
Second, the canopy has changed the original structure of the vehicle. If it encounters windy weather during fast driving, it will easily lead to the vehicle losing its balance and causing traffic accidents.
Third, the rain cover installed at the front of the car is undoubtedly a "knife". In the event of a traffic accident, this "knife" may pierce the driver's heart or neck, endangering his life.
References:
Electric sunshade-Baidu Encyclopedia