The basic principle of Eichrecht is ‘verifiable accuracy of measured values’, ensuring that the customer pays only for what they receive. Customers who charge their EVs must have a possibility to check that they are being invoiced exactly the right amount of energy and that there can be no inaccuracy nor a possibility for anybody (CPO or EMP for example) to modify the energy consumption data from the stations, before the customers are being invoiced for energy.
Accordingly, PTB - The National Metrology Institute of Germany, in accordance with Measurement and Calibration Law (MessEG) and the Measurement and Calibration Act (MessEV) regulates that the measured values be determined by a calibrated measuring device and that data records be stored / handled in a secure and verifiable manner.
Ways of ensuring EichrechtThe verification of the data can be done either by an ‘online‘ software or by an ‘onsite’ hardware solution. Vattenfall stations currently offer two different implementations.