Method for supplying a consumer with electrical energy

摘要

The method involves measuring an electrical power of a load (4) using a measurement apparatus (14) e.g. power meter. Measurement data from the measurement apparatus are analyzed using an evaluation unit of a control element (12) to determine whether the load power is greater than a power available from a direct current voltage source. An electrically conductive connection is produced between an alternating current voltage source (10) and the load by the control element using a switch, when the load power is greater than the power from the direct current voltage source. An independent claim is also included for a standby power supply for supplying electrical power to load in electrical installation.