Fast charging pile and slow charging pile use completely different technology and interface standards. Fast Charging (DC charging) usually uses a specific interface, such as CHAdeMO or CCS (Combined Charging System), while slow charging (AC charging) mostly uses a Type 1 or Type 2 interface. These interfaces have different physical shapes and cannot be used interchangeably.
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If you try to plug a DC fast charger into an AC slow charger interface, you will find that it either does not fit at all or does not form a connection. Therefore, the design of the plug of the DC fast charging pile does not allow the insertion of the AC slow charging interface to prevent equipment damage and user safety risks.
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If your electric vehicle is charged primarily through the slow charge interface, and you want to use a fast charge station, then you should make sure that your electric vehicle is compatible with DC fast charge and that the corresponding fast charge interface is available on the vehicle. If you are not sure which charging type your vehicle supports, it is best to consult the vehicle manufacturer's guidance or consult the owner's manual.