In short, calibration law requires that all components involved in the collection and processing of measured values up to the invoice amount must be trustworthy. Furthermore, the user of the charging station must be able to check their invoice exclusively on the basis of trustworthy components.
Fulfilling this requirement for all components – from the meter and controller in the charging station to the various backends and to the invoice – is technically not possible and not proportionate.
Therefore, a few providers take the approach of enabling invoice verification directly at the charging station through a trusted and audited device.
As an alternative, it is also possible to use a trusted device in the charging station to sign the necessary measured values in a trusted manner and transmit them signed. The transmitted values become part of the invoice and can be verified using software provided by the manufacturer, the so-called 'transparency software'.
Thirty companies, including numerous chraging station manufacturers, have already joined the S.A.F.E. initiative, which was originally founded by the Physikalisch-Technische Bundesanstalt.
The aim of S.A.F.E. is to make the charging of an electric vehicle at the charging station legally secure (in compliance with calibration law). The focus is on the following topics:
The Austrian company has·to·be and Bender Smart Charging GmbH from Bender have been working on the development of the transparency software. This manufacturer-independent transparency software for electric mobility makes it possible to carry out the signature checks for digital measured values in compliance with calibration law.
Benefits of the transparency software:
The technical basis for billing in compliance with German calibration law is provided by the combination of a Bender charge controller, a suitable energy meter and the transparency software. The manufacturer-independent transparency software solution allows simple and transparent kWh-accurate billing of electricity for technical operators of charging infrastructure (CPO), backend operators and end customers.
The CPO is not tied to a proprietary solution or a predefined combination of charging point hardware and backend.
Billing in compliance with German calibration law is not only legally required in public spaces, but also for the charging of company vehicles at a private house connection for subsequent billing with the employer.
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| Charging Electric Vehicles - Protection Against Electric Shock by DC Fault Current Sensor Units | Technical article | 931.2 KB | EN | 2019/05/1313.05.2019 |
