Method for operation of an electric end-user as well as a device using such a method

The method involves operating the loads (21-23) from the mains (11) in normal operation and from an emergency supply (10) if the mains fails. The loads are controlled in accordance with a defined setting when changing from mains to emergency supply and vice-versa to especially reduce of increase the power or to switch the loads on or off. AN Independent claim is also included for the following: an arrangement for implementing the method.