Learning Hub

6 modules on OCPI, from what the protocol is for to a knowledge check. About 2 hours end to end.

Learning modules

A structured path from the basics to hands-on practice. Work through it in order.

1

Foundations

OCPI Basics
Beginner

Introduction to Open Charge Point Interface protocol, its purpose, and key concepts.

Key Terminologies
Beginner

Understand CPO, eMSP, hub, charger and the other terms an integration argues in.

2

Technical Deep Dive

Message Flows
Intermediate

Learn how messages flow between entities in real charging scenarios.

Charging Session Flow
Intermediate

Step-by-step guide through a complete charging session from start to finish.

3

Practice & Assessment

Interactive Tutorial
Advanced

Hands-on practice with the OCPI simulator to reinforce your learning.

Knowledge Check
Intermediate

Test your understanding of OCPI concepts with interactive quizzes.

Guided scenarios

Walk through real OCPI workflows step by step. The fastest way to see how the pieces fit together.

Complete EV Charging Session

Start Here
8 min

Follow a full charging session from the driver arriving at the charger through energy delivery to final billing. This is the core OCPI workflow that every roaming network depends on.

One Card, Two Countries

Technical
5 min

A driver on a German contract pulls into a Dutch charger run by a company they have never used, taps their usual card, and it just works. This is the whole reason OCPI exists, start to finish.

Remote Start & Stop

Technical
5 min

An eMSP remotely starts and stops a charging session on behalf of a driver: the flow behind the 'Start Charging' button in every EV app.

Roaming Connection Setup

Technical
3 min

How a CPO and eMSP discover each other, exchange credentials, and synchronize locations and tokens to enable roaming.

Charged Twice for One Charge

Advanced
4 min

One charge, two lines on the statement. A dropped connection makes the CPO re-send a charge record as a brand new one, and a receiver that does not notice bills the driver twice. The fix is not a delete, it is a Credit CDR.

Tariff & Billing

Advanced
4 min

How pricing flows from tariff publication through to the final invoice. Covers the full billing lifecycle from CPO pricing to driver payment.

The Authorization That Says No

Advanced
4 min

A driver taps an expired card and the charge is refused. The lesson is what a refusal actually looks like on the wire: a successful exchange carrying a 'no', not an error.

The Bill Was Higher Than the Price I Saw

Advanced
5 min

A driver plugs in at what the app says is 0.35 per kWh and gets billed far more. Nothing in the protocol went wrong: the price just changed at 17:00 and the app only showed the daytime rate. The most common charging complaint there is.

The Session That Never Closes

Advanced
5 min

A charge starts and meters normally, then the closing message is lost. Nothing errors. The session hangs open in both systems and is never billed: the quietest, most expensive failure in roaming.

Reference

Look things up while you build.

Explore OCPI Modules

Interactive reference for each module: endpoints, payloads, and fields.

Version Differences

What changes between OCPI 2.1.1, 2.2.1, and 2.3.0, side by side.

Frequently asked questions

Start with OCPI Basics and Key Terminologies to build vocabulary, then move to Message Flows and Charging Sessions for technical depth. Finish with the Interactive Tutorial and Knowledge Check to validate your understanding. The guided scenarios can be done at any point, and they reinforce concepts from each level.

No. The learning modules are designed for both technical and non-technical audiences. Each module has a business-friendly view by default, with a technical toggle for developers who want to see API payloads and protocol details.

About two hours across the six core modules. You can complete them in one session or spread them across multiple visits. Your progress is saved automatically when signed in.

Pair each module with scenario-based simulation and structured test runs so concepts are validated in practical workflows. The guided scenarios bridge theory and practice: after completing a learning module, run the matching scenario in the simulator.