Verifying the Charge Data
The products EVCB-LB-3AC-ECC-10 and EVCB-3AC-ECC-10 are in compliance with the calibration regulations.
With transparency software, users have the option to verify validity of the digitally signed measured values of charging processes. This ensures that the billed values are the same as the actual measured values and have not been manipulated by third parties.
Requirements:
Digitally signed record in a format supported by the transparency software.
Public key of the charger.
Procedure:
- At each of the charging sockets of the charging station, there is an RFID display with a public key that is valid for it. The public key is required for verification of the measured data after the completed charging process.
- Write down the public key on the display at the side of the charger, or photograph or import it via QR code.
- Authenticate it at the charger and start the charging process.
- The starting time of the charging process and the starting value of the meter status are displayed via the RFID display at the beginning of the charging process.
- End the charging process.
- The starting and ending values of the meter and the current time are displayed. The charger generates a digitally signed record from the starting and ending values. It is digitally signed with a private key of the charger. The correctness of the signature can subsequently be verified via the public key at the charger.
Invoice and test data
Make sure that the public key of the charger can be verified and the source of the key is trustworthy. This can be the key that is physically applied to the charger or the digitally saved value at the Federal Network Agency. A public key that is printed on the invoice can possibly be incorrect and lead to incorrect test results.
The data packages of completed charging process may get lost if the data transmission of the signed OCMF data packages to the backend system fails in the longer term. The charger saves the signed OCMF data package only in an internal ring buffer with a fixed size. This ring buffer is not directly accessible to customers. Contact the operator of the charger.
Account creates and transmits an XML file as part of the invoice. It can be opened and verified with a transparency software.
Download transparency software and run an invoice check
The transparency software is subject to continuous adaptations and changes such that the listed steps may deviate from the current version of the software.
Procedure:
- Download the current version of the transparency software (https://www.safe-ev.de) to the computer and unpack it to any folder.
- Make sure that the JAVA framework is installed in the current version.
- Install the JAVA framework via the JAVA web installer.
- Open the transparency software with a double click.
- Select the measured values provided to you via [File] and [Open] and input the public key into the charging station.
- Subsequently, the file and signature formats will be automatically detected.
- If the file and signature formats are not automatically detected, manually enter them in the text field.
- Make sure that the displayed measured values match the data that are printed on the invoice.
- Make sure that the public key is correct and matches the public key of the charger.
- If verification of the measured values is incorrect, the transparency software indicates that the check was not successfully completed.
- The reason for the error or unsuccessful check is displayed.