Chinese EV Charging Standards: GB/T, ChaoJi & Export

Every major automotive market has adopted its own electric vehicle charging connector standard: CCS1 in North America (with Tesla NACS now gaining broad adoption), CCS2 in Europe, CHAdeMO in Japan, and GB/T in China. For international dealers and importers sourcing Chinese electric vehicles, the connector standard installed on a vehicle determines where it can charge, what adapters are available, and whether destination-market infrastructure modifications are needed. This article explains the Chinese GB/T AC and DC standards, introduces the emerging ChaoJi standard, and covers how Chinese automakers adapt charging connectors for export markets.

GB/T: China's National EV Charging Standard

GB/T stands for Guobiao/Tuijian, meaning "National Standard/Recommended" in Chinese. The GB/T 20234 series, first published in 2011 and updated in 2015, defines the physical connectors, communication protocols, and safety requirements for conductive charging of electric vehicles in China. The standard covers both AC and DC charging through physically distinct connectors, though many Chinese-market vehicles incorporate a single charging port with two separate inlet sections on the vehicle side.

GB/T AC connector (GB/T 20234.2)

The GB/T AC connector is a seven-pin design that physically resembles the Type 2 (Mennekes) connector used in Europe but with a different pin layout and communication protocol. It supports single-phase AC charging at 220 volts and up to 32 amps, delivering a maximum power of approximately 7 kilowatts. Some implementations support three-phase 380-volt AC at up to 63 amps, yielding roughly 40 kilowatts, though this is less common in practice. The AC connector uses a Control Pilot and Proximity Pilot signaling protocol defined within the GB/T standard.

GB/T DC connector (GB/T 20234.3)

The GB/T DC connector uses a larger, nine-pin design that is unique to the Chinese market and not physically interchangeable with any other global DC standard. It supports DC fast charging at voltages up to 750 volts or 1,000 volts depending on the specification version and currents up to 250 amps, yielding maximum power around 250 kilowatts for the most common deployment. Higher-power versions have been demonstrated. The communication protocol between the vehicle and charger uses the CAN bus, unlike CCS which uses power line communication based on the ISO 15118 and DIN 70121 standards.

Key GB/T specifications

ChaoJi: The Next-Generation Standard

Origins and development

ChaoJi is a next-generation DC fast-charging connector standard developed jointly by the China Electricity Council and the CHAdeMO Association of Japan. The name means "super" in Chinese. The project was formally announced in 2018, with the goal of creating a unified high-power charging standard that could serve both the Chinese and Japanese markets, and potentially achieve global recognition as an IEC standard.

Technical capabilities

The ChaoJi connector design supports charging power of up to 900 kilowatts in its specification ceiling, with voltage up to 1,500 volts and current up to 600 amps. This is substantially beyond the limits of current GB/T DC or CHAdeMO deployments. The connector is smaller and lighter than the existing GB/T DC plug and uses a different communication protocol: it adopts the CAN bus physical layer with a protocol that can be adapted to support both CAN-based and PLC-based (power line communication) higher-layer communication, allowing potential compatibility with both the Chinese and CCS ecosystems through protocol converters.

Backward compatibility

A key design requirement for ChaoJi is backward compatibility with existing GB/T DC and CHAdeMO vehicles and chargers through compact adapters. This allows a phased transition: new chargers can serve old vehicles with an adapter, and new vehicles can charge on old infrastructure with the corresponding adapter. As of 2025, ChaoJi has been published as a Chinese national standard and is in the early stages of infrastructure deployment in China, with testing and pilot installations underway at selected charging stations.

ChaoJi and global standards

The ChaoJi team has sought recognition through the International Electrotechnical Commission, and elements of the ChaoJi specification have been incorporated into IEC 62196, the international standard for EV conductive charging connectors. However, ChaoJi competes with CCS2 (already widely deployed in Europe) and NACS (gaining adoption in North America) as the industry consolidates around a smaller number of global connector standards. Whether ChaoJi achieves adoption outside China and Japan will depend on regulatory decisions, automaker commitment, and infrastructure investment in the coming years.

How Chinese Export Models Handle Charging Compatibility

A Chinese-market EV with a GB/T connector cannot directly plug into a CCS2 charger in Europe, a CCS1 charger in North America, or a CHAdeMO charger in Japan. Chinese automakers address this in two ways for vehicles destined for export.

Factory-fit destination-standard connectors

The primary strategy is to equip export-production vehicles with the destination market's native connector during manufacturing. Vehicles built for the European market, including BYD models sold in Europe, XPeng vehicles exported to European markets, and Zeekr models for Europe, are factory-fitted with CCS2 connectors that are fully compatible with European charging infrastructure. Similarly, Chinese vehicles exported to Southeast Asian markets that use CCS2, such as Thailand and Indonesia, often carry CCS2 ports. This is the cleanest solution and the one used by all major Chinese automakers for volume export programs. Importers should confirm the connector type on their specific order, as a model sold domestically with GB/T may carry a different port in its export specification.

Adapters for domestic-market vehicles

For vehicles originally built for the Chinese domestic market and later exported as used or grey-market units, adapters provide limited interoperability. GB/T-to-CCS2 and GB/T-to-CCS1 adapters exist from third-party manufacturers. These adapters handle the physical connection and, in more sophisticated units, include electronics to translate between GB/T CAN-bus communication and CCS power line communication. However, adapter performance and safety certification vary widely by manufacturer, and using an uncertified adapter carries electrical and fire risk. Importers of used Chinese-market EVs should verify whether certified adapters exist for the specific vehicle and destination charger combination, and should budget for the possibility that a reliable fast-charging adapter may cost several hundred to over a thousand US dollars.

AC charging considerations

AC charging compatibility is generally simpler. GB/T AC is electrically similar to Type 2 AC used in Europe, with the key difference being the physical connector shape and pin arrangement. Passive mechanical adapters from GB/T AC to Type 2 are widely available and relatively inexpensive, as they do not require protocol conversion. The vehicle's onboard charger must accept the destination grid's voltage and frequency, which in most cases is compatible between Chinese 220-volt 50-hertz single-phase and European 230-volt 50-hertz systems. For North America, where Level 2 AC charging uses 240-volt split-phase, additional electrical compatibility checks are necessary.

Regional Connector Compatibility Summary

What Importers and Dealers Need to Verify

1. Confirm the connector standard on the specific vehicle. A model badged the same way may carry a GB/T port if built for the Chinese domestic market or a CCS2 port if built for export. Check the physical charging port on the vehicle or the specification sheet for the production batch.
2. Verify AC grid compatibility. Chinese domestic vehicles are designed for 220-volt 50-hertz single-phase AC. Confirm that the destination market's residential and commercial AC supply is compatible with the vehicle's onboard charger specification.
3. Check for certified adapters. If importing a GB/T-equipped vehicle, research whether a certified GB/T-to-CCS2 or GB/T-to-CCS1 DC adapter exists from a reputable manufacturer with safety certifications recognized in the destination market. Not all adapter claims are backed by testing.
4. Understand the communication protocol gap. GB/T DC uses CAN bus; CCS uses power line communication. Simple mechanical adapters cannot bridge this gap; an active electronic adapter with protocol translation is required for DC fast charging across standard families.
5. Account for charging speed limitations. Even with an adapter, the maximum charging speed will be limited by the vehicle's onboard charging controller, the adapter's current rating, and the charger's output. Expect lower real-world charging speeds than the vehicle's rated peak when using adapters.
6. Check warranty implications. Using an unauthorized adapter may void the vehicle's battery or electrical system warranty. Confirm with the manufacturer or exporter what charging accessories are supported.

Tesla in China: A Special Case

Tesla vehicles sold in the Chinese domestic market are equipped with GB/T AC and DC connectors, consistent with Chinese regulatory requirements. This means a Tesla Model 3 or Model Y manufactured at Giga Shanghai for the Chinese domestic market carries a GB/T charge port and cannot directly connect to a North American Tesla Supercharger or a European CCS2 charger. Teslas built at Giga Shanghai for export to Europe and other CCS2 markets are factory-fitted with CCS2 charge ports. Tesla also produces a GB/T-to-CCS2 adapter for limited use cases and has, in some markets, offered retrofit services. Importers should verify the charge port standard, vehicle destination, and availability of any official adapter before purchasing a Chinese-market Tesla for use in another region.

FAQ

Can I charge a Chinese-market EV at a European CCS2 charger?

Not directly. A Chinese domestic-market EV with a GB/T DC port cannot physically connect to a CCS2 charger. Active adapters exist on the market that translate the physical connection and the communication protocol from CAN bus to PLC, but their certification and reliability vary. The recommended route is to source export-specification vehicles factory-equipped with CCS2 ports.

What is the difference between GB/T DC and CCS2?

GB/T DC and CCS2 are physically different connectors with different communication protocols. GB/T DC uses a nine-pin connector with CAN bus communication. CCS2 uses a combined AC and DC inlet with two large DC pins below the Type 2 AC section and communicates via power line communication. They are not directly interoperable without an active adapter.

Is ChaoJi replacing GB/T in China?

ChaoJi has been adopted as a Chinese national standard and is in early-stage deployment. It is designed to coexist with and gradually succeed GB/T, with backward compatibility through adapters. The transition is expected to be gradual, as millions of GB/T vehicles and chargers are already in service across China.

Do Chinese automakers export vehicles with CCS2 connectors?

Yes. All major Chinese automakers exporting vehicles to Europe, including BYD, NIO, XPeng, Zeekr, and MG (SAIC), equip their export-production models with CCS2 connectors that are fully compatible with European charging networks. This is a factory-level adaptation applied during manufacturing for export markets.

Can I use a passive mechanical adapter for DC fast charging?

No. A passive adapter that only changes the physical pin arrangement cannot enable DC fast charging between GB/T and CCS because the communication protocols are different: GB/T uses CAN bus and CCS uses power line communication. An active adapter with embedded electronics and protocol translation is required for DC fast charging across standard families.

What should I check before buying a used Chinese EV for import?

Confirm the charge port type with a photograph of the vehicle's charging inlet. Check whether a certified active DC adapter is available for your destination market's connector standard. Verify AC voltage and frequency compatibility. Obtain written confirmation from the seller or exporter regarding which adapters, if any, are included and whether their use affects warranty coverage.

Conclusion

China's GB/T charging standard is mature, widely deployed, and fully adequate for domestic use, but it is isolated from the CCS and NACS ecosystems that dominate the rest of the world. The emergence of ChaoJi may eventually bridge some of these gaps, but today the practical path for international buyers is clear: source export-specification vehicles with native destination-market connectors whenever possible. For used or grey-market imports, research certified adapters carefully and budget for potential charging-speed compromises. As the global EV industry continues to consolidate its connector landscape, Chinese manufacturers have demonstrated willingness to adapt for export, and platforms such as AutoCN can assist importers with verifying specifications and connecting with reliable sourcing channels for export-ready vehicles equipped with the correct charging hardware for their destination market.