EV Charging Standards Flashcards

Which standard defines the North American Charging Standard (NACS) connector as an SAE standard?

Answer: SAE J3400

SAE standardized the Tesla-developed NACS connector as J3400.

What does SAE J2954 address?

Answer: Wireless (inductive) power transfer for light-duty EVs

J2954 covers wireless inductive charging, including alignment and power classes.

ISO 15118-20 added which capability beyond ISO 15118-2?

Answer: Bidirectional power transfer (V2G) and wireless support

ISO 15118-20 supports bidirectional power transfer, wireless charging, and stronger security.

'Plug & Charge' allows a driver to start a session without an app or card. Which standard enables it?

Answer: ISO 15118 with digital certificates

ISO 15118 uses PKI certificates stored in the vehicle to authenticate and bill automatically.

Which standard was developed for very high-power charging of heavy-duty trucks and buses above 1 MW?

Answer: Megawatt Charging System (MCS)

MCS (SAE J3271) targets multi-megawatt charging for medium- and heavy-duty vehicles.

Before ISO 15118 was widely adopted, which protocol did early CCS DC chargers use for vehicle-charger communication?

Answer: DIN SPEC 70121

DIN 70121 was the earlier German specification for CCS DC communication.

Which standard covers conductive AC charging for medium- and heavy-duty vehicles using three-phase power in North America?

Answer: SAE J3068

SAE J3068 defines three-phase AC conductive charging for larger vehicles.