According to relevant information, the height of rooftop solar does not exceed 50cm above the roof. The traffic safety law stipulates that the height of objects installed on the roof of a vehicle cannot exceed 50 cm, so the height of solar panels on the roof of a vehicle must not exceed 50 cm. Rooftop solar refers to rooftop solar cells, which are solid-state optoelectronic devices that use sunlight to directly produce electricity.
Why not add a solar charging panel on the roof of the car to extend battery life
Solar panels can generate electricity when there is sunshine, so in theory, the solar energy from the panels can be used to power the car by charging the battery, but why don't new energy vehicles in real life use this solution? In fact, there is still some gap between theory and practice, even though solar panels can produce electricity as long as there is sunshine. However, if the electricity production is too low, it has no practical significance. Taking a new energy vehicle battery with a capacity of 70 kWh as an example, the electric energy generated by the roof solar panel is just a drop in the ocean and can be used. only increases battery life by a few miles per day. The solar energy conversion rate is approximately 150 watts per square meter.
Of course, there are better. The roof of the car can be up to two square meters, which is 300 watts of electricity generation. If you guarantee 8 hours of sunlight per day, you will get 2.4 kilowatt hours. of electricity and 0.53 yuan per kilowatt hour of electricity, the daily exchange rate is 1.27yuan. Now the tram has around 15 kilowatt hours of electricity per 100 kilometers and can travel 16 kilometers per day. It's like a drop in the bucket. Vehicles are exposed to the sun every day and age seriously. The power generated by a car with a basement is even more pitiful. Its power output is not enough to drive a moving vehicle. parked is too low, so it is more suitable to build large solar panels to generate electricity.
Some riders who often play outside choose to install a set of solar charging panels on the roof of their car, of course, I don't pay much attention to trams and I think that there should be pure ones; electric vehicles equipped with solar charging on the Bar roof? In fact, it is a balance between cost and performance. The capacity of the vehicle's lead-acid battery is too small,so the solar panel on the roof can produce a certain effect. However, the pure power battery capacity of electric vehicles is too large, and the charging effect of solar panels is too negligible. Comparing lead-acid car batteries with electric car batteries is like comparing a bathtub to a swimming pool. of Sonata Hybrid is on the high-end model of installed solar panels.
Only certain cars built specifically for the environment will consider installing solar panels! Generally, solar panels can only be used in relatively large areas, especially in places with good lighting conditions, but when used on cars they are more of a gimmick than a real effect. The main issues concern technological maturity, overall availability and cost-effectiveness. Install itation of rooftop solar can increase the battery life of electric vehicles by about 5-10% at the current technical level, especially in scenarios where air conditioning is insufficient. used in winter and summer, already has practical value.