What's the difference between a single-phase UPS and a three-phase UPS?

The number of electrical phases that a UPS receives and transmits is described by its phase, such as a single-phase UPS or a three-phase UPS. Three-phase power is generated by electrical utilities because it is the most efficient way to transport electricity over long distances. Furthermore, for larger power consumers such as large data centres, industrial manufacturing, and hospitals, the power remains three-phase, necessitating the use of a three-phase UPS. Power is converted to single-phase power for smaller power consumers, such as residential or office buildings and the majority of schools.