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EV charging glossary

Communications

OCPP

Also called: Open Charge Point Protocol OCPP, the Open Charge Point Protocol, is an open communication protocol between an EV charging station and a Charging Station Management System, or CSMS. It carries operational messages such as authorisation, transaction data, meter values, status changes and remote commands. OCPP 1.6 remains widely deployed. OCPP 2.0.1 added a richer device model, stronger security capabilities and improved transaction handling. OCPP 2.1, released in 2025, adds support for ISO 15118-20, bidirectional charging and Distributed Energy Resource control. OCPP does not define the communication between the vehicle and the charge point. That is handled by standards such as IEC 61851 and ISO 15118.

Related terms

CSMS

ISO 15118

OCPI
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