Abstract: A smart server and smart device are disclosed, by which a new power unit price (hereinafter named a combined power unit price) can be calculated in consideration of an internally generated electricity quantity instead of using an external power unit price as it is. The present invention includes a power demand obtaining unit obtaining a home power demand for at least one electronic appliance including a smart device, a generated quantity detecting unit detecting an internally generated power quantity for at least one home generator, a price information receiving unit receiving power information including external power price information on an external power via a network, and a combined unit price output unit outputting a combined power unit price using an external power demand and the internally generated power quantity and the external power price information, wherein the external power demand is calculated based on the power demand.

Abstract: A smart device is discussed, which is connected to a smart grid to perform a power saving function. According to an embodiment, the smart device includes a power information receiving unit configured to receive power information through the smart grid network; a power saving control unit configured to perform the power saving function for at least one apparatus based on the power information in a power saving mode; at least one mode switching unit configured to switch from the power saving mode to a manual mode according to a user command; and a manual mode operational time determining unit configured to determine a manual mode operational time for operating the at least one apparatus in the manual mode, the at least one mode switching unit further configured to switch from the manual mode back to the power saving mode, automatically, when the manual mode operational time expires.

Abstract: A smart server and smart device are disclosed, by which a new power unit price (hereinafter named a combined power unit price) can be calculated in consideration of an internally generated electricity quantity instead of using an external power unit price as it is. The present invention includes a power demand obtaining unit obtaining a home power demand for at least one electronic appliance including a smart device, a generated quantity detecting unit detecting an internally generated power quantity for at least one home generator, a price information receiving unit receiving power information including external power price information on an external power via a network, and a combined unit price output unit outputting a combined power unit price using an external power demand and the internally generated power quantity and the external power price information, wherein the external power demand is calculated based on the power demand.

Abstract: A smart device is discussed, which is connected to a smart grid to perform a power saving function. According to an embodiment, the smart device includes a power information receiving unit configured to receive power information through the smart grid network; a power saving control unit configured to perform the power saving function for at least one apparatus based on the power information in a power saving mode; at least one mode switching unit configured to switch from the power saving mode to a manual mode according to a user command; and a manual mode operational time determining unit configured to determine a manual mode operational time for operating the at least one apparatus in the manual mode, the at least one mode switching unit further configured to switch from the manual mode back to the power saving mode, automatically, when the manual mode operational time expires.