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How does an eRoaming charging station work?

How does eRoaming work - making charging limitlessly simple

Electromobility thrives on simplicity: charging anywhere, regardless of the provider. But this would hardly be possible without eRoaming. eRoaming networks charging infrastructure providers with each other and makes charging at different stations as easy as making a phone call abroad. Drivers can charge at thousands of charging points with just one app or RFID charging card – without individual contracts with each operator.

What is eRoaming?

eRoaming enables cross-provider charging and billing of electric vehicles.
In the background, communication between three players ensures that the charging process runs smoothly:

  • – EMP (Electromobility Provider): Offers drivers access via app or charging card and handles billing.

  • – CPO (Charge Point Operator): Operates the charging infrastructure on site.

  • eRoaming platform: Connects EMP and CPO via standardized interfaces (e.g. OCPI) and checks authorizations in real time.

This means that drivers can charge at thousands of charging points in Europe with a single contract – regardless of provider or location.

How eRoaming works step by step


  1. 1st charging request: Driver:in starts the charging process via app or RFID charging card.
  2. 2nd request: The CPO software sends an authorization request to the eRoaming platform.
  3. 3rd check: The platform asks the EMP whether the user is registered and the contract is valid.
  4. 4. release: After successful authorization, the charging process starts automatically – the vehicle is charged and billing runs in the background.

Why eRoaming is crucial

eRoaming is the key to a user-friendly, networked charging infrastructure. It simplifies access, increases usage and creates transparency:

  • – Convenient charging: Just one contract, access to thousands of charging points.

  • Better utilization: Operators gain more users and increase their profitability.

  • Funding requirement: According to the AFIR regulation (Alternative Fuels Infrastructure Regulation), public accessibility and roaming capability are basic conditions for state funding.

  • Transparent billing: Standardized data communication via OCPI protocols ensures fair and traceable billing.

reev & eRoaming: Simply integrated – connected throughout Europe

With the reev software makes charging points eRoaming-ready – without any complicated technical adjustments. Thanks to integrated OCPI interfaces, reev connects operators with leading platforms such as Hubject or Gireve and enables access to a Europe-wide charging network.

Your advantages with reev:
  • – Simple integration into existing systems

  • – More reach and visibility through eRoaming partner networks

  • – Automated billing and user management in the reev Platform

  • – Future-proof thanks to cloud-based technology and ongoing updates

This makes electromobility limitless – for operators and drivers alike.

eRoaming makes electromobility suitable for everyday use. It connects the various players, ensures transparency and creates a nationwide charging experience – regardless of the provider. With intelligent solutions such as the reev software charging points are not only operated, but also networked – efficiently, future-proof and conveniently.

With reev, your charging points become eRoaming-ready.

Find out how to intelligently network and efficiently operate your charging infrastructure.

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