What’s a CHAdeMO? Charging Protocols Explained

Not all plugs and communication protocols are the same. There are two ways to charge a vehicle; using AC electricity or DC electricity. In the US, AC charging is a universal standard; every passenger car uses the same connector (except Tesla). The Society of Automotive Engineers (SAE) calls it the J1772 connector. 



For DC charging there are two charging connectors in North America. The Japanese standard is called CHAdeMO (which is a play on the Japanese words “let’s stop for tea”), adopted by Nissan and Mitsubishi.




The other is CCS, or Combined Charging Standard, used by everyone else. Except Tesla.


 The plug and connector is one aspect, but there is also a charging protocol that enables the messaging between the vehicle. These plugs enable communication between the charging station and the vehicle. CHAdeMO and CCS can exchange more information, such as vehicle ID and battery state of charge (SOC), whereas J1772 is relatively simple and cannot. CHAdeMO also developed the required messages to enable bi-directional power flow and enabled V2H functionality back in 2012.

CCS is still working on it and has not come out with a standard yet. This is why CHAdeMO vehicles are unique why the Setec device is capable with the Nissan LEAF and Mitsubishi Outlander.

We expect the CCS standard will be capable of V2H/V2L in the next few years and will have compatible products.