Rotary UPS systems will benefit significantly from the phase voltage balancing effect of the powerPerfector, which will allow them to work more efficiently. As many UPS devices act to correct over-voltage themselves, supplying them with the correct voltage through a powerPerfector will mean that they will not have to operate in this mode routinely, allowing more efficient day-to-day operation. The powerPerfector replicates other functions of some UPS systems, by protecting against common transients, filtering harmonics and balancing phase voltages. This may mean that a UPS is not required for a particular application, or a less expensive UPS can be specified.