Losses on the Public Transmission System
The losses represent mainly the energy dissipated due to the Joule effect during transmission over the high and extra high voltage network. They depend mainly on consumption, the generation plan and cross-border exchanges.
The system loss rates are included between 2 and 3.5% of consumption, depending on the seasons and time of day. On average, the rate comes to 2.5%, which represents about 11.5 TWh (TeraWatt-hours) per year.