TeleEV Charging Solutions: Understanding the J1772 Connector Standard

TeleEV Charging Solutions: Understanding the J1772 Connector Standard

When venturing into the realm of electric vehicles (EVs), one of the key considerations is understanding the charging solutions available. For Tesla owners, a proprietary plug is the norm, reminiscent of Apple's Lightning connector, unless an adapter is in play. However, for the broader spectrum of electric cars in North America, the J1772 connector, also known as the J Plug, emerges as the standard.

What is a J1772 charger? Dive into the details with us to unravel the intricacies of this essential component in the EV charging landscape.

About SAE J1772 Charging Adapters

For those inclined towards home charging, two types of chargers come into play: Level 1 and Level 2 chargers.

Level 1 chargers come included with your electric vehicle, featuring a SAE J1772 plug on one end and a grounded three-prong plug on the other. These can be plugged into a standard wall outlet, providing up to 140 miles of range for 20 hours of charging.

Level 2 chargers, sold separately, offer a faster alternative. With SAE J1772 connectors, these chargers can deliver 3 to 7 times faster charging than their Level 1 counterparts when plugged into 240V outlets.

*History of J1772: *Adopted by the California Air Resources Board as the EV standard, the SAE J1772 adapter marked a pivotal shift in EV charging. Initially developed by Avcon and later refined by Yazaki Corporation, it gained prominence for its ability to plug into standard household outlets, enabling convenient at-home charging.

Main Features of J1772

Yazaki's design incorporates a 5-pin layout for AC charging, with three main pins connecting AC Line 1 (L1), Neutral AC (N), and the Protective Earth (PE), also known as Ground. Two smaller pins, Proximity Pilot (PP) and Control Pilot (CP), facilitate safety and communication between the EV and the charging station.

The J1772 connector, built for durability, can endure up to 10,000 mating cycles, promising a lengthy lifespan of up to 27 years with daily charging.

Different Types of Connectors

Level 1 Chargers: Suited for residential areas, Level 1 chargers, although the slowest, are easily found and often included with electric vehicles.

Level 2 Chargers: Found in charging stations, parking spaces, malls, and offices, Level 2 chargers provide faster charging, with up to 18-28 miles of range per hour.

CHAdeMO: A DC fast charger, competing with the Combined Charging System (CCS) connector, originally developed by Nissan and Mitsubishi.

SAE Combo (CCS): A response to CHAdeMO, the SAE Combo plug, available in Combo 1 (CCS 1) and Combo 2 (CCS 2) variants, features two additional pins for direct current.

SAE J1772 Charging Speed

Primarily used in Level 2 chargers, the SAE J1772 connector offers faster charging than Level 1 but is not as rapid as DC fast charging connectors. Charging speed varies based on the outlet, with a standard NEMA 5-15 home outlet supplying around 1.44 kW of power, and a 240V system capable of up to 19.2 kW.

Most Level 2 chargers with the J1772 connector provide approximately 20-25 miles of range per hour, making a full charge for an average 250-mile-range EV achievable in about 10 hours.

What Charging Stations Use a J1772?

Almost every Level 1 and Level 2 charging station in North America utilizes J1772 plugs, except for Tesla charging stations. While non-Tesla EVs can access these stations with ease, Tesla owners require a cable adapter for compatibility.

Can I Charge My EV with a J1772 Plug at Home?

Absolutely! J1772 plugs are compatible with Level 1 and Level 2 home charging, offering a straightforward solution for at-home EV charging. Simply plug it into a standard wall outlet, and your electric car is set to charge.


How does the J1772 charging standard for plug-in vehicles work? The J1722 standard features Pilot and Proximity pins, identifying the Electric Vehicle Supply Equipment (EVSE) plug even when not actively charging.

What cars use a J1772 charger? All electric vehicles in the US and Canada, excluding Tesla, employ the SAE J1772 connector for Level 1 and Level 2 charging.

Is J1772 fast charging? While not classified as fast charging, J1722 offers faster charging than Level 1. It delivers around 1.44 kW of power in a 120V system and up to 19.2 kW in a 240V system.

Is J1772 the same as CHAdeMO? No, J1772 and CHAdeMO differ. J1772 is designed for AC charging, while CHAdeMO connectors facilitate DC fast charging.

In conclusion, understanding the nuances of the SAE J1772 connector standard is crucial for navigating the diverse landscape of electric vehicle charging. As the automotive industry continues to evolve, the J1772 remains a steadfast and widely embraced standard, contributing to the accessibility and convenience of EV charging solutions.

For more insights into the world of electric vehicles and charging solutions, stay tuned to TeleEV – your guide to a seamless EV experience!

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