How measurement and calibration law affects EV charging infrastructure
author
Marc Mültin
updated
July 9, 2021
published
April 22, 2020
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An e-book for beginners and experts alike. Reduces the steep learning curve of ISO 15118 by providing a comprehensive and easy-to-understand access to the Vehicle-to-Grid communication protocol. Written by our founder, one of the few co-authors of ISO 15118, this e-book has fast become standard literature in the industry.
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A White Paper Based on the Legal Situation in Germany (also known as "Eichrecht")
Are you manufacturing charging stations, managing charging stations via your IT backend as a charge point operator, or providing end customer contracts as an e-mobility service provider? If you answered ‘yes’ to at least one of these questions and you plan to provide your product or service in Germany, then the white paper shown below is for you.
This white paper addresses the existing calibration law regulations (“Eichrecht” in German) and ways to facilitate a transparent and tamper-proof billing process. Germany is one of the first countries across the globe to enforce calibration law regulations for EV charging infrastructure. We assume that similar regulations and requirements will also be introduced in other countries of the European Union and maybe even beyond along with an increasing market penetration of EVs.
The white paper covers the following subject matter:
The legal framework related to charging infrastructure and the billing of electric energy is still early and may continue to evolve with time and use cases. Over time, an ever-growing list of companies will introduce products and services to the market that comply with the legal stipulations described in this white paper. Many countries in Europe and worldwide may soon adopt this legal framework or make country-specific adjustments.
We plan to keep this document up-to-date and would appreciate your input to achieve this goal. Please don’t hesitate to contact us and let us know of any insights you may have on this matter.
With OCPP 2.0.1 and the new device model concept, a station can automatically describe its full layout and capabilities to the cloud-based CSMS. This allows for plug-and-play installation of a charging station. It also lets the CSMS read and control any component remotely.
Sara stands for Station Analytics and Remote Administration
The Open Charge Alliance is the official body that specifies OCPP 2.0.1 and defines a set of certification profiles. Each profile tests a certain set of functionalities. Depending on the functionality of your charger or CSMS, you might want to certify for either a subset or all of these profiles.
Continuous Integration / Continuous Deployment (CI/CD)
Scotti stands for Simple Compliance Testing Tool for Interoperability.
Efficient XML Interchange (EXI) is a very compact representation of XML. All ISO 15118 messages are defined in XML. EXI improves serialisation and parsing speed on embedded devices (like an EV and a charging station controller) and allows more efficient use of memory and battery life, compared to standard (textual) XML.
The Message Queuing Telemetry Transport (MQTT) is a lightweight, publish-subscribe network protocol that transports messages between devices.
A CSMS is a cloud-based management system operated by the company that is managing the charging stations. A charging station connects to a CSMS using OCPP (Open Charge Point Protocol).
Automated Connection Device (ACD), a conductive charging concept that doesn't require a person to plug in the charging cable. A first implementation is ACD-P, where 'P' stands for 'pantograph' charging of buses.
Power line communication, a communication technology that enables sending data over existing power cables.
Signal Level Attenuation Characterisation (SLAC) is based on power line communication (specifically HomePlug Green PHY) and is a protocol to establish the data link between the EV and the charging station via the charging cable.
Charge Point Operator, the entity monitoring and managing an EV charger network.