Method for controlling the power of a system, the system comprising an electrical energy source, electrical loads, an energy storage unit, an inverter (2, 6) and a charge regulator, the system being connected to an AC power supply grid by means of a power sensor connected therebetween, it being possible, by means of the power sensor, to determine the amount of power imported from the AC power supply grid by the system, or it being possible to determine a corresponding variable, such as active power imported from the AC power supply grid, the sensor signal being supplied to a controller, which controls the amount of power imported from the AC power supply grid towards zero by actuating the inverter (2, 6) and the charge regulator accordingly, the charge regulator comprising an inverter that is actuated in a pulse-width-modulated manner and the DC-side terminal of which is fed from a rectifier of the charge regulator, the AC-voltage-side terminal of the rectifier being rectified by a further rectifier and charging voltage thus being provided to the energy storage unit, the controller comprising a filter, a sensor being provided for detecting a temperature of the energy storage unit, the sensor signal being supplied to a signal electronics of the inverter (2, 6), such that temperature-based charge regulation can be carried out for the energy storage unit, the charge regulation for the energy storage unit being carried out by a signal electronics arranged in the housing of the inverter (2, 6), the inverter (2, 6) and the charge regulator being activated in alternation, - when the photovoltaically generated electric power exceeds the power of the loads, the controller actuates the charge regulator such that excess power is conducted to the energy storage unit and only excess power beyond this is fed into the AC power supply grid, the inverter (2, 6) being placed in a standby state, deactivated and/or switched off by the controller, - when the photovoltaically generated electric power falls below the power of the loads, the controller actuates the inverter (2, 6) such that power is supplied to the loads from the energy storage unit, the charge regulator being placed in a standby state, deactivated and/or switched off by the controller, only electric power required beyond this being imported from the AC power supply grid, characterised in that a switch-on delay means is arranged in the actuation path from the controller to the charge regulator and/or the inverter (2, 6). - when the photovoltaically generated electric power exceeds the power of the loads, the controller actuates the charge regulator such that excess power is conducted to the energy storage unit and only excess power beyond this is fed into the AC power supply grid, the inverter (2, 6) being placed in a standby state, deactivated and/or switched off by the controller, - when the photovoltaically generated electric power falls below the power of the loads, the controller actuates the inverter (2, 6) such that power is supplied to the loads from the energy storage unit, the charge regulator being placed in a standby state, deactivated and/or switched off by the controller, only electric power required beyond this being imported from the AC power supply grid,