x

Switch to Clarity – The Case for OCPP 2.0.1

author
Marc Mültin
published
March 10, 2022
Read Time
~
5
min read

We believe sharing knowledge and helping others in the e-mobility industry to innovate is the way forward . So we decided to kick off this year with a brand new webinar series “Switch to Clarity”.

In episode one, our engineers Hugo and Chad joined me to shed light on the key benefits of OCPP 2.0.1 over OCPP 1.6, specifically the new and powerful device management functionality, also known as “Device Model”.

Here’s the recording of our webinar from February 25, 2022. Towards the end, we also shared an example of how to visualise the device model using Sara, our modern and user-centred approach to a charging station management system (CSMS). You can find this at minute 35.52.


Q&A around the OCPP 2.0.1 device model and ISO 15118-20


The last 15 minutes of the webinar were dedicated to questions. Below, we’ve linked the questions to the timestamps in the video and elaborated our answers in a bit more detail. Is there any other specific question you would like us to answer? Shoot me an email at marc@switch-ev.com.


Q: Can you describe the AutoDiscovery process in the CSMS please?

A: The first time the charging station connects to a backend, it provides a base report and with it a full description of its logical and hardware components. An example for a logical component is the transaction controller (TxCtrl), which allows you to configure certain parameters that influence a charging session, like the start and stop point of a transaction. 

This means that once the charging station boots up and connects to the CSMS, the CPO gets a full picture of all the components the charging station entails. That information can be quite extensive, depending on the type of charger and what the charger manufacturer wants to expose through the device model. For efficiency, the message can be split up into multiple messages . 

The CSMS can then modify the configuration of these components, i.e. changing certain variables like the Heartbeat interval, power limits on a charger, and the security level (e.g. mandating the installation of certain digital certificates). Some of that configuration might be automated. 


Q: How to deal with legacy chargers in the network that are not compatible with all those new standards?

A: The update from OCPP 1.6 to OCPP 2.0.1 is likely to be more of a software than a hardware upgrade. If your charger is connected to a backend and allows firmware updates, there’s a good chance you can migrate your existing charger network to OCPP 2.0.1. Although there is some overlap between these two protocols, they are not backwards compatible. OCPP 2.0.1 entails a lot more use cases than 1.6 as it incorporates the learnings of the industry of the past years. This means that the codebase is bigger, requiring more memory space. 

Also, given the new security features in OCPP 2.0.1 (e.g. client side authentication and support for Plug & Charge), your existing charger needs enough memory space to store the relevant digital certificates. More often than not, charging stations that have been installed in the last decade have limited resources when it comes to CPU power and memory space, so this could become an issue. 

Furthermore, when it comes to ISO 15118, you also need to make sure that the charger is equipped with a HomePlug GreenPHY modem to enable the power line communication (PLC) required for an ISO 15118-based charging session with an EV.

We’re currently in a transitional phase where the vast majority of chargers are only equipped with OCPP 1.6 but the need for a more sophisticated charger management requires the adoption of OCPP 2.0.1. It is hard to predict when exactly the tipping point will be, but we’re confident that it will be within the coming year or two. The e-mobility market is still a very nascent one and studies have shown that more than 90 percent of the expected market (i.e. EV charger installation base) in 2030 is still ahead of us. 


Q: Is there any update about ISO 15118-20? Also how different will it be from ISO 15118-2 regarding implementation and programming language used? 

A: Have a look at this article for more in-depth information on the new features coming with ISO 15118-20. It's a major milestone towards a universal charging standard that covers pretty much every possible use case for all kinds of EVs, be it cars, motorcycles, buses, ships, trucks, and even small aeroplanes. The new features include:

 

  • Vehicle-to-grid (bidirectional energy flow) for both AC and DC, which is very likely the strongest reason to adopt ISO 15118-20 within the coming 2 years
  • Pantograph charging for buses, aka ACD-P for Automated Connection Device for Pantograph
  • Wireless charging
  • A more explicit support for handling multiple contract certificates for Plug & Charge
  • A new charging mode called Dynamic Mode, which puts the charger more in control of the charging process (better for ancillary grid services)
  • Stronger data security, making TLS 1.3 mandatory for all use cases (with new, strong cipher suites)


ISO 15118-20 FDIS was published on February 18, 2022. You can purchase it online at Beuth publishing house (available in both German and English): https://www.beuth.de/en/draft-standard/iso-fdis-15118-20/350057248

The current status is a Final Draft International Standard (FDIS), which is basically a technical feature freeze. This means that only editorial changes are possible between the FDIS and IS (International Standard). So it's safe to start implementing based on this draft, there will be no more technical changes.

To clarify: ISO 15118-2 and -20 are not backward compatible but you can have both standards implemented on an EV or charging station. There is a mechanism defined in both -2 and -20 (SupportedAppProtocol) that enables the EV and charging station to agree on a mutually supported communication protocol.


Q: In the USA, most back end providers use OCPP 1.6 with no short term plans (< 2 years) to convert to OCPP 2.0.1. Comments?

A: We understand that due to the backwards compatibility issues and the significant increase in complexity, many CSMS providers and also charging station manufacturers are holding back on the adoption of OCPP 2.0.1. That’s exactly where we can help, both with Josev, our embedded operating system of CCS-based EV chargers, and Sara, our future-proofed  charging station management system. If you’re interested to learn more about Josev and Sara, then book your tour here

Click image to download the presented slide deck


Next episode: what’s new in ISO 15118-20?

Are you interested to learn more about the new ISO 15118-20 standard? Great, we’ve got news for you: our second episode “Switch to Clarity - What’s new in ISO 15118-20?” will take place on March 25, 2022.

Register here to save your spot!

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.

Single User

Personal

All the knowledge you need to become an ISO 15118 expert

£410

  • Saves you many days of tiresome trial and error
  • Helps you to really understand ISO 15118
  • Free updates delivered to your inbox
Buy now
Multiple users

Business

Are you interested in copies for your colleagues or students? We offer company-wide licenses as well as licenses for academic libraries.

£1640

  • Train your team on this future-proof technology
  • Provide access to students of e-mobility tech
  • Ensure updates for each employee / student
  • Unlimited number of copies included in purchase
Request now

Want to try before you buy?

Get an extract from each chapter to see the quality and in-depth information you’ll get in the full e-book. The ISO 15118 Manual definitely helps you grow your expertise and positioning in the e-mobility market.

Provide your name and email address to get it delivered to your inbox.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Join a group of experts in the know

Since we have published our ISO 15118 Manual it has been purchased by the biggest names in our industry and has become standard literature.

as well as Daimler, Porsche, Shell, Tritium, and many more...

As we were intensively implementing and testing
ISO 15118, we noticed there was a lack of overview of Plug & Charge and the whole supply chain amongst
our stakeholders.

Our training with Marc helped us achieve a much better understanding of the whole ecosystem. It led to constructive discussions on the requirements and concept of ISO 15118 in general.

Angelika Neuleitner,

charging system Specialist at Ionity

Working with recognized standards is the right way forward for the integration of electric vehicles into the grid, and we value Switch’s strong experience with the ISO 15118 standard.

We were able to leverage Marc’s insights to corner some of the keys issues pertinent to V2G in the published standard that needed to be addressed.

Hamza Lemsaddek,

Director embedded solutions at Nuvve Corporation

Attending Switch’s intensive two day training with the team gave us a deep dive into ISO 15118 and the different use cases.

We were able to validate our design with regards to the ecosystem and beyond. We now have a head start for the development of our next generation chargers and are able to support our customers for the deployment of the equipment all over Europe.

Johan Devos,

business development Manager at ENOvates

Certificate handling in ISO 15118 is a quite complex issue. Marc’s well prepared one-day course on this topic and his deep knowledge helped us to train our team and speed up the development of the ISO 15118 Plug & Charge
charging controller.

Johannes Bergmann,

eMobility Charging Systems DEVELOPER at SIEMENS AG

When I was working with students on ISO 15118 projects, Marc's courses tremendously helped in getting students to understand the standard quickly and dive into coding without hesitation. Marc's crystal-clear explanations with eye-catching graphics will make you an EV charging expert in one week.

Minho Shin,

Professor at Myongji University

In two exciting training days, Marc quickly and effectively explained ISO15118 communication to our experienced development team. In addition to the in-depth technical knowledge, the information about the communication standards that are still being established is very valuable. The training will definitely help us to make the implementation more effective.

Reinhard Starzinger,

Project Manager Electric Mobility AT Keba AG

Marc Mültin
March 10, 2022

Related reads

Latest News

Sign up to our newsletter

Stay up-to-date with relevant industry news and international
events, in-depth articles, and more today.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

SWITCH HQ

The Ministry
79-81 Borough Road
London, SE1 1DN
hello@switch-ev.com

A MEMBER OF

SUPPORTER OF

Copyright ©2022 Switch. All rights reserved.