Many people believe that the only function of a UPS is to provide power in the event of a utility (power) failure. Power outages, even when load shedding is implemented, are not daily occurrences. Dips, surges, spikes and harmonics (dirty power) most certainly are. These unseen power disturbances can cause as many if not more problems than power failures.
In the case of microprocessor based equipment, both hardware (equipment) failure as well as software (data corruption) failure are as a direct result of these unseen disturbances. A UPS, especially an online UPS will resolve the majority of these problems.