Plug and Charge (PnC) refers to an EV charging technology in which charging and payment are performed at once without a separate process. In general, in order to charge an electric vehicle, a connector must be connected to the vehicle, user authentication must be performed using a dedicated card, and charging fees must be paid. However, PnC simplifies the complicated procedure to increase the convenience of charging. As soon as the charging connector is plugged in, charging and payment can be made using the user and vehicle information stored in the vehicle. Hyundai Motor Group is creating a convenient electric vehicle charging environment by introducing PnC technology to the ultra-fast charging station E-pit. For reference, Hyundai Motor Group strengthened security by establishing a public key infrastructure (PKI) authentication system consisting of its own server, encryption, and decryption keys, which are the core of PnC charging.