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Standards Development
Ensuring metrological relevance for billing purpose for EVSE measuring systems. The scope shall include the requirements for a telecommunication agnostic data model and format which can leverage already existing IEC standards to guarantee that transactiona l metrological data is protected, immutable and encrypted.
The scope excludes definition of specific communication technologies or architecture, but should allow, if relevant or needed, to reutilise already existing communication channels available in the EVSE to transport the data. In particular, but not restrict ed to, ability to transport the billing data through OCPP and IEC 63584shall be part of the scope
Regional or national regulations (e.g. amendments of EU directives and regulations on Union’s electricity market design) pertaining to submetering or dedicated measurement devices should also be taken into consideration by the project team to ensure fundam ental alignment is achieved.
The scope shall further include requirements for EV data flow (both directions, including possible time constraints, actors), with main use cases illustrated, proposed data model (classes, structures, codes) with required processing/data conversion (method s), data protection and privacy (mandatory/optional, including key handling), data exchange & supported profiles (if any) as well the underlaying cybersecurity requirements complying to the international standards and legislative frameworks.
Media layers adaptation (if any) can be discussed but standardisation of the telecommunication protocol is out of scope.
Today, there are already established and recognized standards for data exchange of metrologically relevant information used for billing purposes. In grid digitalization and smart metering, the IEC 62056 standard series has been used for over a decade and d eployed in over 300 million devices to date. This standard fulfils the WELMEC requirements for MID compliance, and is being adopted by ANSI and in the near future by other large standardization organisations (China, Brasil,…). In the world of EVSE, in some countries specific solutions have been developed to answer specific nation requirements (e.g. OCMF).
Currently, there are no international standards covering the requirements for data integrity aspect of EVSE measurements when used for billing of energy. While this is not fundamentally different from DSO grade billing, there are some particularities like the transactional nature of the EVSE supply behaviour.
The recent amendments to the Regulations (EU) 2019/942 and (EU) 2019/943 and Directives (EU) 2018/2001 and (EU) 2019/944 as regards improving the Union’s electricity market design, will push towards opening the energy supply and flexibility markets, specif ically mentioning the EVSE as one of the identified smart appliance subject to this new regulation. This will impact how EVSE will have to communicate and exchange data with the operators for energy billing and demand -response, using a billing-grade sub-meter (referred as a Dedicated Measurement Device by the EU commission). While the focus of IEC remains international, it should still take into considerations the legislative frameworks of the major regions to avoid having contradicting standards which woul d be detrimental to the industry.
It is fundamental that the EVSE industry does not develop a specific billing solution only applicable to its own vertical because the legislative frameworks require a number of “smart appliances” to be able to buy and sell energy and flexibility services. The operators of those services will need to have a standardized way to receive billing information as they will have the manage a number of different type of appliances.
It is important to consider the currently used communication protocols, in particular OCPP and/or IEC 63110. The proposal here is to standardize a communication agnostic data exchange, protocol for the purpose of billing energy and flexibility, that is tra nsported using existing protocols and can be bridged over multiple protocol stacks while retaining message integrity. While the telecommunication protocol could be industry specific, the billing data shall be formatted in a segment agnostic manner.
In order not to have a divergent standard between Europe and the rest of the world, it is important to undertake standardization activities within IEC in order to consider the requirements from the major regions and make sure that they converge or at least have a common basis.
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