Patent ID: 7269751

Claim:
A method of supplying power to at least one electrical device, the method comprising: determining a power demand of the at least one electrical device; determining an efficient operating point for a primary power supply supplying power to the at least one electrical device; supplying power to meet the power demand of the at least one electrical device using one or more of the primary power supply operating at the efficient operating point and a secondary power supply based on whether the primary power supply operating at the efficient operating point is operable to meet the power demand of the at least one electrical device; determining whether the power demand of the at least one electrical device substantially exceeds a combined output power for the primary power supply and the secondary power supply for a predetermined period of time; and reducing the power demand of the at least one electrical device in response to determining the power demand of the at least one electrical device substantially exceeds the combined output power for a predetermined period of time, wherein reducing the power demand of the at least one electrical device comprises migrating workload from the at least one electrical device to another electrical device operable to receive one of a) power from the primary power supply and the secondary power supply, and b) power from a power supply other than the primary power supply and the secondary power supply; and wherein the another electrical device operating more efficiently with the migrated workload.