Patent ID: 8200990

Claim:
An apparatus to provide reliable electric power, the apparatus comprising: at least two power buses that transfer regulated direct current (“DC”) power from at least four power supplies to an electric load, the at least four power supplies receiving electric power from a plurality of electric sources and each of the at least four power supplies converting the electric power to the regulated DC electric power; a switch connected between each of the at least two power buses and the electric load, wherein each switch connects and disconnects a power bus to the electric load and transfers the regulated DC electric power from the buses to the electric load; and an output power bus connection disposed on each of the at least four power supplies, wherein each of the power buses is connected to at least two power supplies connecting the at least two power supplies in parallel, the at least two power supplies of a power bus receive electric power from different electric sources of the plurality of electric sources, and each output power bus connection connects the corresponding power supply upon which the output power bus connection is disposed to exactly one power bus, the output power bus connections transferring the regulated DC electric power to the connected power bus.