Method, system and device of multicast functionality in an energy portal

Disclosed is a system for transferring messages over first (110) and second (not shown) networks. The system is comprised of a first network (110), a computing device (108) connected to the first network (110), a second network, one or more devices (102) connected to the second network and an energy portal (106). The energy portal (106) comprises a network interface, a memory and a processor. The network interface connects the energy portal (106) with the first network (110) and the second network. The processor is configured to receive, using the network interface and over the first network (110), a single message which includes at least one device characteristic. The processor is further configured to determine one or more of the devices (102) that are connected to the second network that are associated with the at least one device characteristic and transmit, using the network interface, the single message over the second network to each of the one or more devices (102) associated with the at least one device characteristic. The single message is transmitted individually to each of the one or more devices (102) associated with the at least one device characteristic such that the single message is transmitted as many times as there are devices (102) associated with the at least one device characteristic. The device characteristic may relate to load control, pricing or messaging capabilities.