The America NACS Tesla Connector supports alternating current (AC) charging and direct current (DC) fast charging.

 

 

The current version of the America NACS Tesla Connector (V3 Tesla Supercharger) is capable of delivering up to 250 kilowatts (500 amps at up to 500 volts).

When operating on AC power, the NACS system can deliver up to 80 amps at 277 volts (derived from 480 volt three-phase commercial power). In its most common configuration, however, NACS delivers up to 48 amps, or 11.5 kilowatts, at 240 volts (the typical residential voltage on North American split-phase power systems).

 

 

The NACS connector has a single button on the top center. When the button is pressed, a UHF signal is emitted. When the connector is locked in place, a signal commands the vehicle to withdraw the catch that secures the connector. When the connector is unlocked, a signal commands nearby vehicles to open the door covering the charging port.

 

 

NACS uses a five-pin layout, with the two main pins used for AC and DC fast charging:

The DC+/L1 pin provides the positive pole of the DC voltage link, or it provides line 1 in a split-phase connection when using AC, or the only line in a single-phase connection.

The DC-/L2 pin provides the negative pole of the DC voltage link, or when using AC it can act as Line 2 in a split-phase connection, or provide the neutral in a single-phase connection.

The G (ground) pin provides the connection between earth and the vehicle chassis. The ground pin is also used as a reference point for CP and PP signals and for measuring the isolation of electrical systems.

The CP (Control Pilot) pin serves as the digital communication path between the charging system and the vehicle. The control pilot uses pulse width modulation to communicate charge status and current information in accordance with the requirements of IEC 61851. During DC charging, power line communications are superimposed on the control pilot lines.

The PP (Proximity Pilot) pin delivers a low voltage signal that is used to determine the status of the vehicle connector. When a button on the plug is pressed to unlock the connector, a switch in the adjacent pilot circuit on the connector opens, stopping the flow of electricity.

 

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