What is OCPI in simple terms?

OCPI is the protocol that lets charging providers exchange roaming data in a standard way.

Why is OCPI important for roaming?

It enables consistent communication for locations, tokens, sessions, and billing records across companies.

Learn OCPI

What is OCPI (Open Charge Point Interface)?

Learn what OCPI is and how the Open Charge Point Interface enables EV roaming between charging networks. Understand CPO, eMSP roles, and interoperability fundamentals.

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If you are implementing or debugging OCPI roaming, these guides focus on practical terminology, message flows, and real integration pitfalls.

Topics covered

What is OCPI
Open Charge Point Interface explained
OCPI explained
OCPI basics
EV roaming explained
CPO eMSP roles

Recommended path

OCPI (Open Charge Point Interface) is the roaming protocol used by CPOs and eMSPs to exchange data such as locations, tokens, sessions, tariffs, and charge detail records. A clear mental model of the protocol reduces integration mistakes and speeds up debugging.

This guide is written to be practical: read the explanation, then validate your understanding with message-flow diagrams and hands-on simulations.

For a smooth learning progression, start with fundamentals, then move to terminology and message flows, and finally practice with the interactive simulator.