ENERGY MANAGEMENT METHOD AND ENERGY MANAGEMENT DEVICE FOR A RESIDENTIAL COMPLEX WITH ONE OR MORE RESIDENTIAL UNITS OR FOR A CITY AREA

The present invention provides a power management method and a power management device for a residential complex comprising one or more residential units or for an urban district, comprising a shared connection via which self-supplied electricity from a time-variable generation capacity is supplied to the mains power network from a decentralised self-supplied-electricity generation apparatus, and via which mains electricity is supplied to the residential complex or the urban district from the mains power network. The method is configured such that the demand not covered by the decentralised self-supplied-electricity generation apparatus is determined according to the mains supply level 1−S of the electricity and the demand covered by the decentralised self-supplied-electricity generation apparatus is determined according to the self-supply level S of the electricity for the residential complex or urban district, time dependency of the electrical consumption of a residential unit is recorded, and electricity costs for the residential unit of the residential complex or of the urban district are determined by taking into account the determined time dependency of the mains supply level and the self-supply level, the recorded time dependency of the electricity consumption of the residential unit, and the relevant tariffs for mains electricity and self-supplied electricity.