Compatibility is written into the ChaoJi project as a design goal, in both directions: the new connector is being designed with adapter paths back to the CHAdeMO and GB/T chargers already installed, and migration paths for today’s cars at future ChaoJi chargers. But a design goal is not a product. No ChaoJi car or charger is on sale yet, no adapter exists to buy, and no launch date has been announced — so today the compatibility story is a plan to understand, not an accessory to shop for.
Key Takeaways
- Backward compatibility is a stated design goal of ChaoJi, in both directions — and still only a design goal.
- CHAdeMO and GB/T share CAN-based communication roots, which is why an adapter path can be designed into this transition at all.
- No ChaoJi car, charger or adapter is on sale, and no launch date has been announced.
- Buy for today’s connectors; EVDANCE confirms each DC unit’s connector set in writing at order time.
The Two Directions of Compatibility
ChaoJi is the joint next-generation DC project of the CHAdeMO Association and China’s electricity industry council, designed as one harmonised successor to CHAdeMO and GB/T. A successor that stranded either installed base would defeat its own purpose, so the transition was part of the brief from the start:
| Direction | The design intention | Status today |
|---|---|---|
| A future ChaoJi car at today’s CHAdeMO or GB/T chargers | An adapter path designed into the project, so early ChaoJi cars can use the existing network | Design intention only — no production car, charger or adapter exists yet |
| Today’s CHAdeMO and GB/T cars at future ChaoJi chargers | Orderly migration paths are an aim of the project, so the existing fleet is not cut off | An aim, not a specification you can buy against |
| CCS and NACS cars and chargers | Not part of the project at all — separate regional tracks | Unaffected either way |
Why Adapters Are Plausible Here — and Rarely Elsewhere
Most cross-system DC adapters fail on language: the two sides negotiate the session in different protocols, so a plug shape is not enough. ChaoJi’s two parent systems are closer than most. CHAdeMO’s signalling is based on vehicle CAN networks, and GB/T’s communication is CAN-bus based as well — the two families share vehicle-network roots, and ChaoJi is being written by the bodies that own both. An adapter designed into the standard from the start, by the people who wrote both sides of it, is a different proposition from a grey-market device designed after the fact to bridge two strangers. That difference is still only a design argument until hardware ships — the checks in our adapter safety guide will apply to ChaoJi adapters when they exist, exactly as they do to today’s.
Design Goal Is Not a Product
- Nothing to buy. There is no ChaoJi adapter, car or charger on sale; compatibility claims in listings today are plans described as products.
- No date to plan around. The project has announced no date by which it reaches cars you can buy.
- Today’s cars are not stranded in the meantime. CHAdeMO and GB/T chargers keep serving the cars built for them, and a new standard does not switch off an installed base.
- The decision that matters is still today’s. When choosing a car or charger, the working question is which of today’s inlets it has — as the comparison in our connector guide sets out.
What EVDANCE Builds While ChaoJi Is a Plan
EVDANCE builds for the connector families in production and sells no ChaoJi product. Its compact DC unit, the EV-RHDC30K-L (22 kW DC, OCPP 1.6J, IP54), is specified with the connector set for its market at order time — confirmed in writing before an order, never assumed. When a future connector reaches production cars, chargers follow the cars; the full product range tracks the standards drivers actually use.
Frequently Asked Questions
Can I buy a ChaoJi adapter now?
No. Adapters are part of the project’s design brief, but no ChaoJi vehicle or charger is in production, so there is nothing for an adapter to connect yet. Anything sold under the name today is not a product of the standard.
Will my CHAdeMO car be stranded when ChaoJi arrives?
The project aims for migration paths precisely so that it is not, and installed CHAdeMO chargers keep working for the fleet built for them. There is no announced date to plan around — buy and maintain for today’s network.
Does ChaoJi change anything for CCS or NACS drivers?
No. ChaoJi is the successor track for CHAdeMO and GB/T in Japan and China. Europe’s CCS2 and North America’s NACS — standardised as SAE J3400, as our NACS explainer covers — are separate tracks with their own installed bases.
Related Reading
- Is the Tesla Charger NACS? NACS, J3400 and Adapters Explained
- Type 2 vs J1772 vs NACS: Which EV Charger Connector Does Your Market Need?
- Are EV Chargers Universal?
- What Is J1772? The North American EV Plug Explained
