transparent proof of origin is revolutionizing electricity trading. The VOLTEX ecosystem selects from a preferred power source and already making a significant contribution to the energy transition of the future. VOLTEX focuses on energy-intensive industries and therefore follows a top-down approach. This includes the area of application from the high voltage to the medium voltage until the low voltage network level. This approach should not follow the uncertain way upwards via electricity-producing households, but from the major consumers and energy producers to the individual households.