Patent ID: 7388364

Claim:
A device for covering the peak load of an electrical consumer (VB) that can be connected to an alternating current terminal of a public electricity network (ENT), comprising: a power inverter (WR) that can be supplied from a direct current accumulator (BAT) and at the output thereof can be connected in parallel to the supply of electricity (EB) of the consumer (VB), a measuring device (Z 1 , Z 2 ) that can be connected in the connection circuit (EN) of the consumer and a control device (STE) that is directed toward monitoring, with the aid of the measuring device (Z 1 , Z 2 ), the energy consumption of the consumer (VB) and, in the event that the energy consumption value obtained in this way exceeds a given threshold value, putting in operation the power inverter (WR) in order to support the supply of the consumer, wherein the control device (STE) is directed toward estimating a quantity of electrical energy (E*T)) consumed up until the end (T) of a given time interval from the energy consumption of the consumer (VB) and, in the event that the prognosis value obtained in this manner exceeds a given threshold value (E max ), putting the power inverter (WR) in operation in order to support the supply of the consumer.