Method and system for transferring information about the production type of electric energy

The method involves modulating an information signal of main voltage over a power supply network (1) by a current composition information unit (3), where the information signal includes a coded form of information regarding a type of transferred electrical power. The Information signal is unidirectionally distributed over the network to all loads (4). The information signal is demodulated and decoded by a receiver of the load. Information (8) regarding a creation type of the electrical energy is provided in a visual and/or acoustic form and/or provided to other apparatuses. The frequency of the network serves as carrier frequency. An independent claim is also included for a system for transmission of information regarding type of electrical power distributed to multiple loads.