This is a series of car fast charging system mechanical operation sound.
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The first is a variety of heat dissipation fans in the fast charging system, these heat sinks are used for the stable and variable pressure system of the fast charging system, so the heat dissipation is very strong, so the heat sink is basically a high-speed fan, and the sound will naturally be large.
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It may also be that the run-in time of the car is relatively short, and some lubricating oil can be added.
Possibly because of the instantaneous current overload, Tesla cars are rectified in accordance with 220 volts and 380 volts, which is rectified in accordance with a fixed value, but the national grid, if the voltage suddenly rises, the car will also rise with its voltage.