A power grid system provided herein. The power grid system includes an assigned distribution zone of a plurality of distribution zones. The assigned distribution zone is divided into a plurality of sub-zones. Each of the plurality of sub-zones includes a s...

Energy management system having at least one submetering and communication module, the module including: a submetering unit configured for metering appliance related power consumption parameters related to an electr(on)ic appliance; and a first communicati...