Method and device for operating a number of decentralised units supplied with electrical energy consumers/suppliers connected to an electric low voltage network conforming to the network

The method involves monitoring the network parameters for compliance with their assigned tolerance areas. A superordinated device (20) transmits a modified tariff profile to a critical unit when the network parameters of the critical unit depart from the assigned tolerance area at grid connection points. An optimization program is selected such that it leads to a change of the plan of action in the critical unit such that the network parameters approach again the tolerance areas. An independent claim is also included for a device for grid-compliant operation of a low voltage network.