GB/T and CHAdeMO are important to understand when serving vehicles associated with the Chinese and Japanese markets. They are discussed together here because both can appear in mixed or imported fleets, but they remain different charging systems.
The first distinction is fundamental: GB/T covers separate AC and DC charging interfaces; CHAdeMO is a DC charging system. A CHAdeMO-equipped vehicle uses another interface for AC charging. See Yazaki's AC and DC connector overview.
Quick comparison
| Topic | GB/T charging family | CHAdeMO |
|---|---|---|
| Main regional association | Mainland China | Japan, with equipment in other markets |
| AC charging | Separate GB/T AC interface | Provided through another charging interface on the vehicle |
| DC charging | GB/T DC interface | Dedicated CHAdeMO interface |
| Direct plug interchangeability | Not directly interchangeable with CHAdeMO | Not directly interchangeable with GB/T |
| What to verify | Exact AC/DC interface, standard edition, and vehicle support | Vehicle and charger compatibility, implemented capabilities, and local service availability |
For an imported vehicle, inspect the actual charging specification. A brand's home country does not establish which connector is fitted to a particular export version.
GB/T: separate interfaces for AC and DC
In EV charging discussions, “GB/T” is shorthand for a group of Chinese standards. GB/T 20234.2 addresses the AC interface, while GB/T 20234.3 addresses the DC interface. Separate AC and DC connections do not mean drivers should connect both cables at once. See the official GB/T AC-coupler record.
The edition matters. China's official standards catalogue lists GB/T 20234.3-2023 as replacing the 2015 DC-coupler edition. Related communication standards are separate documents, so a procurement request should identify more than “GB/T supported.” See China's national standards catalogue.
China's Ministry of Industry and Information Technology describes the 2023 update as retaining the existing DC interface approach while adding provisions for higher-power charging. That does not upgrade the rating of an existing charger or vehicle: the installed hardware remains the practical limit. See the MIIT announcement.
CHAdeMO: dedicated DC charging with continuing development
CHAdeMO is strongly associated with Japan and also serves vehicles and installations elsewhere. It should not be described as universally discontinued. The CHAdeMO Association announced CHAdeMO 2.1 in June 2026, demonstrating that protocol development continues. New specifications do not automatically make their features available on older equipment. See the CHAdeMO 2.1 announcement.
For an operator, the useful question is how many supported vehicles need service locally and for how long. Decisions to maintain or add CHAdeMO should consider actual usage, vehicle replacement plans, and equipment support rather than a blanket claim about global decline.
Are GB/T and CHAdeMO becoming interchangeable?
The CHAdeMO Association and China Electricity Council have collaborated on the next-generation ChaoJi initiative. That collaboration is not evidence that existing GB/T and CHAdeMO plugs can connect directly or that every adapter combination works. See CHAdeMO's ChaoJi overview.
Any cross-standard solution needs explicit support for the vehicle, charger, electrical ratings, and communication involved. Ask for documented compatibility and a tested configuration instead of assuming that physical adaptation is sufficient.
Operations and CSMS considerations
For a mixed site, recommended acceptance checks are:
- List GB/T AC, GB/T DC, and CHAdeMO separately in equipment records and driver information.
- Test the actual vehicle models expected to use each service.
- Confirm whether a multi-cable charger supports simultaneous sessions or shares one output.
- Check that failed starts, interrupted sessions, and final energy records are represented correctly.
When assessing CarChargeOS or another white-label CSMS, make the exact charger model, firmware, and management interface part of the review. A connector standard describes a different layer from the charger-to-management connection; OCPP addresses the latter - see our What Is OCPP? guide.
Practical takeaway
Plan GB/T and CHAdeMO support around the vehicles you need to serve. Keep AC/DC interfaces and standard editions explicit, verify any adapter claims, and use commissioning results to establish what the site can reliably offer.
Related: The six major charging families and CCS charging explained.