An uninterruptible power supply (UPS), also known as a continuous power supply (CPS) or a battery backup is a device which maintains a continuous supply of electric power to connected equipment by supplying power from a separate source when utility power is not available. It differs from an auxiliary power supply or standby generator, which does not provide instant protection from a momentary power interruption, however could be used to provide uninterrupted power to equipment for 1 - 20 minutes until a generator can be turned on. Integrated systems that have UPS and standby generator components are often referred to as emergency power systems.

For most organizations today, the possibility of consolidating Information Technology Data Center (IT-DC) out of remote offices and into the main data center is an idea that has been on the table to cut costs and boost productivity. After all, isn't consolidation supposed to produce these benefits with nothing more than a small one-time effort of some time and money?