Abstract: A system for measuring energy consumption including a plurality of devices of which at least a subset includes a communication unit for supplying operating status information indicating an actual operating status with respect to an actual energy consumption of the associated one of the plurality of devices. A meter measures a total energy consumption of the plurality of devices. A controller calculates an individual energy consumption of a particular one of the plurality of devices from a change of the total energy consumption occurring at a change of the operating status of the particular one of the plurality of devices.

Abstract: A system for measuring energy consumption comprises a plurality of devices (DEi) of which at least a subset comprises a communication unit (CUi) for supplying operating status information (OSi) indicating an actual operating status with respect to an actual energy consumption of the associated one of the plurality of devices (DEi). A meter (EM) measures a total energy consumption (TEC) of the plurality of devices (DEi). A controller (CO) calculates an individual energy consumption (IEC) of a particular one of the plurality of devices (DEi) from a change of the total energy consumption (TEC) occurring at a change of the operating status of the particular one of the plurality of devices (DEi).