It is said that electric vehicles are troublesome to replenish energy, why don't electric vehicles install a solar panel to charge it? I believe that many people will have such an idea, just like the current street lights, with a solar panel, basically do not need to charge. But is it really that simple?
You think that if you charge under the sun for a day, you can return 50% of the blood? In fact, if it is so simple to use solar energy to replenish energy, solar charging has long become the standard of new energy models, can you think of it, can engineers not think of it? Why not install solar energy on the roof of the car is because the charging efficiency is too low and too chicken. In fact, there is no such solar charging system on the market, but without exception, it does not have much effect.
Modern Sonata Hybrid
A few years ago, Hyundai Motor launched a hybrid Sonata that can be charged by basking in the sun, the roof is a whole solar charging system, which increases the cost of the whole vehicle by about 1075 US dollars, equivalent to 7500 yuan, do you know how much battery life is increased by sunshine? Basking in the sun for 6 hours a day can only increase the endurance of 1300 kilometers a year, which is equivalent to 3.56 kilometers per day.
But after installing it, your skylight is gone, you can't open the window for ventilation, and if you encounter a high-altitude falling object, the maintenance cost will be a big expense.
Prius Hybrid
In July 2019, Sharp developed a high-efficiency solar panel for Toyota, which was installed on the roof, engine cover and tail compartment cover of the Toyota Hybrid Prius. The area is larger than sonata, but this solar panel still can not meet the energy demand, its power of about 860 watts of power, conversion efficiency of 34%, calculated down, 6 hours of sun, but can rush into 2 kWh of electricity, used to drive the vehicle to drive is not realistic, can only be used as a power supply for vehicle ventilation systems.
So, unless your solar panels are large, like the one below, the system can generate up to 2,000 watts of electricity, and at 40% efficiency, for 8 hours, it can only increase the amount of electricity by 6 kWh.
But, the question is, the system costs $5,000, are you willing to spend $5,000 on such a chicken rib product?
Do you park where there is such a big place to spread the solar charging panels?
When it rains on a cloudy day, the system is completely ineffective, you still have to charge, only half the time of the year is available, do you still think that the five thousand dollars is worth it?
Therefore, at present, the installation of solar charging systems on the roof is chicken ribs, high cost, low charging efficiency, once damaged maintenance costs are high, therefore, most models of solar systems are used for ventilation in the car, want to replenish energy, or practical charging piles.