Hotel_Koeln

Cologne hotel installs the first version of ebee charging points in compliance with German calibration law

The e-mobility sector is now gaining momentum in Germany too. Although the Chancellor’s goal of having 1 million electric vehicles registered on German roads by 2020 is no longer achievable, according to current estimates, there will be 3 million registered electric vehicles by 2025. In the meantime, the regulatory and economic importance of this topic has dawned on the relevant players: Municipalities are integrating e-mobility concepts into their emission reduction programmes, the property sector is integrating charging infrastructure into their redevelopment and construction project plans. The catering industry is also increasingly recognising the added commercial value of public charging points on their own car parks.

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Datasheets CC612 515.6 KB EN08.10.2021 09:08:03D00325

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Cologne City Hotel at the Roman Tower

On 22 July of this year, the Cologne City Hotel at the Roman Tower put into public operation two 22-kW wallboxes from the manufacturer ebee smart technologies GmbH. People are paying for public charging either with charging cards from the green electricity supplier Naturstrom and many other providers or spontaneously without a card via QR code and an internet connection. ebee charging points with their solid metal housing are ideal for public charging. They are optionally available in the basic model as wallboxes, charging points or as street lamp chargers.

The Cologne hotel operator sees their use as more than just a potentially higher number of overnight stays. "The two charging points are the perfect addition to our car park facilities, which we want to offer to hotel guests as well as external e-mobilists who are looking for a conveniently located green charging point in the centre of Cologne", explains Andreas Wörner, tenant of the hotel that belongs to the Kolping Society of Germany.

The model used at the city hotel is the first version of the ebee wallbox that complies with German calibration law. Since 1 April 2019 when the calibration law was enacted, German law has required the end consumer to be able to trace back previous charging and billing operations at public charging points. The ebee charging points are enabled for this by the Bender CC612 charge controller in combination with the certified "eHZ Mobility" meter from EMH. A cross-vendor transparency software developed by ebee and other members of the so-called SAFE initiative provides the backend communication of these components. Since spring 2019, ebee charging points allow energy to be invoiced in kWh via the backend in accordance with German calibration law. 

Cologne City Hotel at the Roman Tower

In addition to the possibility of complying with German calibration law, Bender charge controllers also provide an excellent range of smart technology features that are usually only found individually in separate solutions. This explains the increasing importance of Bender technology for the charging infrastructure on the market. Along with ebee, numerous other charging point manufacturers have decided to install them, including well-known, international manufacturers. The widespread use of Bender technology automatically creates technologically advanced synergies between the individual charging infrastructure brands through installation, operation and maintenance.

For example, charging point manufacturers can, if interested, obtain the expertise of the ebee team on how to make their own products comply with German calibration law on the basis of Bender charge controllers. "We even allow them to directly copy our approach to keep the effort for all parties involved in the certification process as low as possible. This of course is only practical when using the Bender charge controller", explains ebee CTO Robert Weyrauch. "Overall, we offer our customers maximum future-proof charging point operation," and the ebee Managing Director explains his product philosophy further, "this means future customer requirements with ebee charging points are already planned or can be realised via software updates."

Given the openness to development of electric mobility, this technology package for the Bender charge controller will be required for future operation of the charging infrastructure.

Based on this, customers and operators can also be confident that ebee charging points will have a broad smart charging portfolio that is open to development.

„Die beiden Ladesäulen sind die perfekte Ergänzung für unser Parkplatzangebot, mit dem wir nicht nur Hotelgäste ansprechen wollen, sondern auch externe E-Mobilisten, die eine günstig gelegene Ökostrom-Ladesäule mitten in der Kölner Innenstadt suchen.“

Andreas Wörner, Stadthotel am Römerturm Köln

Cologne City Hotel at the Roman Tower

Cologne City Hotel at the Roman Tower

The Bender and ebee developers seem to be on course with their technical and quantitative development. Whether intelligent energy control in the private smart home or public charging in the car park – the electric mobility of the future requires intelligent charging infrastructure.

By achieving German calibration law compliance, ebee has created the conditions for continuing to guarantee its own technical advantages within the scope of this regulation. The Cologne City Hotel at the Roman Tower will probably not need all the features right now, but the future can now unfold. Ultimately, with the installation of the two public charging points, the city hotel is making a contribution as a "co-designer of the urban transport revolution," explains Oliver Hummel, CEO of NATURSTROM AG, that supplies the stations with 100 percent green electricity.

Dipl. Pol. Peter Wilhelm, ebee smart technologies GmbH

The Bender and ebee developers seem to be on course with their technical and quantitative development. Whether intelligent energy control in the private smart home or public charging in the car park – the electric mobility of the future requires intelligent charging infrastructure.

By achieving German calibration law compliance, ebee has created the conditions for continuing to guarantee its own technical advantages within the scope of this regulation. The Cologne City Hotel at the Roman Tower will probably not need all the features right now, but the future can now unfold. Ultimately, with the installation of the two public charging points, the city hotel is making a contribution as a "co-designer of the urban transport revolution," explains Oliver Hummel, CEO of NATURSTROM AG, that supplies the stations with 100 percent green electricity.

Dipl. Pol. Peter Wilhelm, ebee smart technologies GmbH

Cologne City Hotel at the Roman Tower

  • Therefore, the well-known Bender fault current monitoring with integrated type A RCD fault current measurement and an integrated DC 6 mA RCMB residual current measurement in the charge controller produces a significant cost reduction, because: The purchase of a type A or B RCD  in the sub-distribution system is no longer necessary.
  • The Bender-ebee development team opted early on for the ISO 15118 standard, which defines a powerline communication via the charging cable (plug & charge) between the vehicle and the charging point. Charging authorisation without an RFID card is now just as possible as the future integration of the vehicle into network solutions. The latter will be indispensable in a future with a smart grid and volatile currents from renewable energy sources.
  • On the other hand, the dynamic load management implemented using ebee charging points has met with great interest from car park operators and property project developers, because it keeps the costs for building mains connections within limits. DLM master/slave communication can be used locally, i.e. without a backend, to control up to 200 connectable slave charging points (via Ethernet or WLAN). The main installed power can be kept low by distributing the charging current intelligently over time, for example in car parks and underground garages. Even when expanding a previously existing charging point, mains connections can be kept constant. The available power is then distributed between the larger number of charging points dynamically and according to the needs of the vehicles. The external metering also offered by ebee rounds off the demand-driven variability of load management in the overall system.
  • ebee attaches value to standard openness for backend operations: ebee charging infrastructure is compatible with all commercial backend solutions thanks to the Bender charge controller. Billing and charging point operation and maintenance can be handled conveniently from the office using the open OCPP protocol (currently 1.5 and 1.6 JSON/SOAP).
  • ebee charging points can be flexibly adapted to local conditions even with regard to the technical communication between the authorisation receiver, charging points and the backend. Data connection can be either via 3G/4G modem, Ethernet, WLAN or even offline (without a backend connection) via RFID chip authorisation, or by local whitelist or FreeCharge. Charging point operators can therefore decide whether they want to define a closed loop of chargers or ensure public charging using backend operation with charging cards or direct payment. Earlier issues with charging card compatibility have almost been eliminated by systematic roaming.

Cologne City Hotel at the Roman Tower

The Bender and ebee developers seem to be on course with their technical and quantitative development. Whether intelligent energy control in the private smart home or public charging in the car park – the electric mobility of the future requires intelligent charging infrastructure.

By achieving German calibration law compliance, ebee has created the conditions for continuing to guarantee its own technical advantages within the scope of this regulation. The Cologne City Hotel at the Roman Tower will probably not need all the features right now, but the future can now unfold. Ultimately, with the installation of the two public charging points, the city hotel is making a contribution as a "co-designer of the urban transport revolution," explains Oliver Hummel, CEO of NATURSTROM AG, that supplies the stations with 100 percent green electricity.

Dipl. Pol. Peter Wilhelm, ebee smart technologies GmbH

Technical reservations cleared away

On 30 April 2019, our partner ebee smart technologies GmbH in Berlin received the type examination certificate for its charging point "Berlin" from the Physikalisch-Technische Bundesanstalt (PTB, National Metrology Institute of Germany). As of now, ebee starts with the delivery of charging systems conforming to German calibration law. Existing charging points can also be converted to kWh-accurate billing in compliance with German calibration law.

Downloads

CategoryNameSizeLanguageTimestampD-/B-Number
Technical article Technical paper: Charging Electric Vehicles - Protection against Electric Shock by DC Fault Current Sensor Units 931.2 KB EN13.05.2019 10:29:22
Flyer Calibration law 146.5 KB EN05.06.2019 10:03:43

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