The FIBARO Wall Plug stores power consumption data in its memory – disconnecting the power from the outlet will not erase the data. To reset the power consumption memory:
1) Connect the FIBARO Wall Plug to an outlet,
2) Hold button B for 5-10 seconds until the LED ring turns green,
3) Release button B,
4) Briefly press the B button. Resetting the electricity consumption memory will be signaled by a double green flash of the LED ring.