For Level 1 charging using a standard 120-volt household outlet, EVs typically draw between 8 and 15 Amps, depending on the specific EV model and the charging efficiency.

For Level 2 charging using a 240-volt charging station, the amperage required to start charging varies depending on the maximum charging capacity of the EV's onboard charger. Most EVs have onboard chargers with a maximum capacity of between 3.3 and 11.5 kilowatts (kW), which corresponds to amperages between 14 and 48 Amps at 240 volts. However, some EVs have higher capacity onboard chargers that can draw up to 80 Amps.

The charging rate will depend on the maximum charging rate of the Tesla's onboard charger and the amperage of the J1772 charging station.

For Level 2 charging using a J1772 charger and a Tesla adapter, the charging rate for a Tesla will depend on the maximum charging capacity of the onboard charger. For example, a Tesla Model S with an 11.5 kW onboard charger will charge at a maximum rate of approximately 29 miles of range per hour of charging on a J1772 charger with a 40-Amp capacity. However, if the J1772 charger has a lower capacity, the charging rate will be lower.