Protocol Development


One of the main tasks of CHAdeMO Association is enabling and providing the evolution of the CHAdeMO protocol, adapting it to the changing market environment and needs of e-mobility stakeholders.

Dynamic change of power during charging, making emergency stop button optional or enabling high power charging are only a few of the elements that were included in the past protocol updates.

CHAdeMO technical team not only ensures that all updates are technically robust and sound, but also that they are backward compatible, enabling earlier versions of vehicles and chargers to work smoothly with the newer models.

The protocol evolution relies on interactions with the Regular Members of the Association and happens via face-to-face technical workshops in Japan and in Europe, or via tele conferences with the international CHAdeMO member community.

Surveys are also regularly sent to the Regular Members in order to gather their opinions and requests about the upcoming changes to the protocol.

CHAdeMO protocol today

CHAdeMO Protocol today (2.0) allows for up to 400kW of charging (400A x 1kV), aiming at 900kW through CHAdeMO/CEC collaboration.

Overview of CHAdeMO protocol versions

CHAdeMO issues new versions of the protocol offering new capabilities to car and charger manufacturers and their users.

CHAdeMO 0.9

The very first standardised protocol version and the most popular one. Most CHAdeMO chargers deployed worldwide work according to 0.9 protocol.

CHAdeMO 1.0

Certain functions of the protocol, such as vehicle protection, compatibility and reliability were enhanced in the 1.0 version, published in 2012.

CHAdeMO 1.1

Enabling dynamic change of the current during charging, making emergency stop button optional and allowing smaller cable diameters for V2H are included in 1.1 version of the protocol, published in 2015.

CHAdeMO 1.2

High power charging (200kW), including protection against over-temperature, overload/short-circuit current protection and coordination, ground fault detection, as well as vehicle-side impedance requirements, published in 2017.

CHAdeMO 2.0

High power charging (up to 400kW), enabling large commercial vehicles including trucks and buses (among others), compatible with plug-and-charge functionality, published in 2018.

Protocol development news