The maximum rate at which one can charge electric cars' batteries will depend on the car and will be limited by the car's charging software to the maximum allowable value. You will have to check what your car can accept. As an example, a Chevrolet Bolt can accept a maximum of 50 kW, while a Porsche Taycan can accept a maximum charge of 270 kW. It is probably safe to say that most EVs won't reach the limit of their charging speed using a home electric vehicle charger of any kind.