Compliance with the German Eichrecht
Eichrecht promotes correct and fair billing for end users by regulating charging station measurements and tariffing methods.
All public and semi-public charging stations in Germany must comply with Eichrecht regulations, influencing the following fields:
• Metering. Every charge point must have a KWh measurement meter, which is officially registered and periodically calibrated. The driver is expected to be able to approve the KWh reading on the charging station (via a display or the actual kWh meter device) and verify on the app.
• Pricing. According to Eichrecht regulation, EV charging is exclusively based on KWh consumption. Pricing for Eichrecht-compliant charging includes such options as price per KWh, starting fee + price per KWh, and price per KWh + parking fee. Though such tariffs as time spent while parking and session fees must be distinguished from the KWh billed on the invoice.
• Data security. Every part of the EV charging process has to be Eichrecht-compliant. A private or public key pair is used to generate a digital signature. The charging station's private key must be securely held, while the public key must be presented on-site. This public key is used to validate the digital signature's authenticity and integrity.