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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 transactional 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 restricted to, ability to transport the billing data through OCPP and IEC
63110 shall 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 fundamental 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 (methods), 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
deployed 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 organizations (China, Brazil,…). 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 behavior.
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, specifically 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 would 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
transported 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 an 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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