Patent ID: 8373306

Claim:
An uninterruptible power supply (UPS) system comprising: a battery subsystem including a plurality of batteries for generating electrical power; a UPS subsystem including a plurality of UPS power modules; at least one first bus system coupling the battery subsystem to the UPS subsystem to supply electrical power to the UPS subsystem; an input and output (I/O) subsystem in communication with an output of the UPS subsystem for generating an output signal; at least one second bus system for coupling the output of the UPS subsystem to the I/O subsystem; and wherein at least the first bus system includes a pair of parallel coupled, independent busses; and wherein the first bus system further includes first and second tie bars for enabling the pair of busses to be selectively reconfigured relative to the UPS power modules; and further such that selective use of the first and second tie bars enables: all of an output from the battery subsystem to be applied to a first subportion of the UPS power modules; and all of the output from the battery subsystem to be applied to a second subportion of the UPS power modules; and a portion of all the output from the battery subsystem to be applied simultaneously to all the UPS power modules when the first tie bar is not in use and the second tie bar is in use.