V2G Clarity


Expertise for E-Mobility and the

Vehicle-2-Grid Communication Standard 

ISO 15118



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Insider blog posts

Standardisierung , ISO 15118 Test-Symposien   •   21. September 2016

The ISO/IEC 15118 Testing Symposium initiative now invites you to the "5th International ISO/IEC 15118 Interoperability and Conformance Testing Symposium", which will be held on 10 and 11 November in South Korea on the island of Jeju-do. Host of the event will be the Korea ...

  • südkorea
  • edition 2
  • testing symposium
  • compatibility
  • iso 15118
  • conformance
Standardisierung , Ladeinfrastruktur   •   09. August 2016

The Open Charge Point Protocol (OCPP), launched by the Open Charge Alliance, an industry alliance of public and private charging infrastructure providers, is the most widely used communications protocol between charging infrastructure and charging operators. Its further development will now take place in ...

  • ocpp
  • protokoll
  • backend
  • oasis
  • lg2wan
  • iec
  • emiop
  • standardisierung

Digital communication between

 electric vehicles and charging stations

Information about ISO 15118 - Communication standard for a user-friendly e-mobility experience

User-friendly Plug-and-Charge

Wouldn't it be convenient if all you had to do was simply plug the charging cable into the electric vehicle and charging station and all the authentication, authorisation, billing and charging control processes occurred automatically in the background? Without the hassle of carrying around RFID cards and without the need to scan a QR code with your mobile phone in rainy weather?

This simple "plug-and-charge" - or "park-and-charge" mechanism in the case of inductive charging stations - is one of the ideas behind the communication standard ISO 15118, which will be applied between electric vehicles and charging stations and has already been internationally standardised.

Internationally recognised ISO and IEC standard

In 2009, the international standardisation bodies ISO and IEC joined forces and started a standardisation initiative called "Road vehicles - vehicle-to-grid communication interface", which developed the specification of a digital IP-based communication protocol between electric vehicles and charging stations.

This standard is based on the analogue charging method according to IEC 61851 and supplements this safety protocol with a powerful digital protocol at a higher level of communication for the transfer of energy-related, value-added information. 
The standardisation of this protocol has undergone several steps, whose status I always keep up to date here.

Integration into the smart grid

The move towards a "smart grid" is to be completed as part of Germany's "Energiewende" energy policy. Information and communication technologies should enable solar, wind and biogas plants, energy storage devices, consumers and network transmission and distribution resources to exchange information amongst themselves and to be controlled remotely.

Electric cars will be granted a pioneering role, and will be able to support the energy network as controllable consumers and storage for excess electricity from renewable energy sources and, in regenerative cases, provide ancillary serivces to the grid.

This is all facilitated by this new communication standard. The exchange of relevant information between the electric vehicle and charging station enables renewably generated energy to be used in the best possible way and can protect the power grid from overload situations - thus counteracting an expensive network expansion.

Investment security through compatibility and interoperability

Since 2014, internationally oriented test symposia have been held twice annually where automakers, charging infrastructure operators and suppliers test their existing implementations for their ability to interoperate with each other and to comply with the standard. The venue switches regularly between Asia, Europe and the US and continues to gain popularity. About 40 companies were represented at the last event.

A common understanding of the standard to be implemented is essential for interoperability and compliance with the respective implementation. For this reason, the ISO 15118 User Group was launched, a forum for resolving implementation issues and discussing clear solutions, which also influences the standardisation process.


ISO 15118 goes Open-Source

A fully-featued reference implementation for electric vehicles and charging stations in Java

Giving a standard wings with open source

The more that a young standard becomes widely known, the more that people can easily make use of it. To the same extent, the confidence in a new technology grows the more people have open access to it and can put it through its paces.

RISE V2G therefore serves as an open source reference implementation of the ISO 15118 standard. Companies, research institutions and other interested parties already implementing the standard can use this software as a receiver for their own implementation of an ISO 15118-compliant charging station or even an electric vehicle.

GitHub Logo

Suitable for commercial use

RISE V2G is published under the Eclipse Public License 1.0, which enables utilisation in commercial products (under certain conditions). The source code is written in Java. Technical due diligence of the source code has already been carried out through the Eclipse Foundation, thus ensuring usability in commercial products.

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About the author

Dr.-Ing. Marc Mültin

I studied computer science at the Karlsruhe Institute of Technology (KIT) and received my doctorate there with the question of how an electric car capable of bi-directional energy transfer can be integrated into the energy management of a smart home. After that I worked for the company Chargepartner GmbH, which offered comprehensive software-as-a-service solutions for charging and billing the loaded energy of electric vehicles.

I have been self-employed since March 2016 and, in addition to my activity in research projects, I am available with my expertise in the field of e-mobility to help companies interested in the ISO 15118 standard to face their challenges.

Standardisation and committee work

As part of my membership in the DIN standards committee, I have actively promoted the standardisation of the communication protocol ISO 15118 from the outset and have written parts of ISO 15118-1 and 15118-2. Currently I am also intensively involved in the creation of edition 2 of ISO 15118.

In addition to my standardisation activities, I work as part of the DKE Working Group DKE/AK 901.0.115 "Information security in electric mobility" as a working group chairman in shaping a VDE application rule for certificate handling as part of ISO 15118.

Dr.-Ing. Marc Mültin

Research activities

As part of the DELTA research project started in January 2016, I work on dealing with all outstanding gaps and questions regarding data security, data integrity and the verifiable legally correct measuring and billing of electricity at charging stations for electric vehicles and developing solutions for this purpose. The project is funded by the BMWi and has a term of three years.

On the other hand, the research project "SeDaFa - self data protection in a networked vehicle", also begun in 2016, focuses on the transparent representation of the personal data collected in the vehicle and a self-determined control of the dissemination of the vehicle's own data – as well as billing data in the context of e-mobility. The project is funded by the BMBF and has a term of two years.


As part of my scientific activity, in addition to my dissertation I have published various articles that deal with the integration of electric vehicles into the power grid and thereby focus on the use of standardised information and communication technology such as, for example, the ISO 15118 standard.


Do you need an expert to answer questions about the charging communication standard ISO 15118 and want to bring yourself and your team up to date?

Whether you are a charging station operator, e-mobility service provider or services platform operator in the context of charging and billing electric vehicles, I will provide my expertise to support you in your project. 

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