UPS (Uninterruptible Power Supply) A device that provides a backup battery in the event of a power failure or unacceptable voltage level. A small UPS system can supply power in a matter of minutes; it is enough to shut down the computer in an orderly manner, while larger systems have enough batteries for hours. In mission-critical data centers, the UPS system can be used in minutes until the generator takes over.

The UPS system can be set to warn the file server to shut down in an orderly manner when an outage occurs and the battery is exhausted.

Surge suppression and voltage regulation
Surge protectors filter out surges and spikes, and the regulator maintains a uniform voltage during a power outage, but the UPS can run the computer in the absence of power. UPS systems typically provide surge suppression and can provide voltage regulation. See surge suppression.

Standby and line interaction
Standby UPS, also known as "offline UPS," is the most common type of UPS in a computer or office supply store. It draws current from the AC outlet and switches to the battery within a few milliseconds after detecting a power failure.

The line interactive UPS "interacts" with the AC power line to smooth the waveform and correct for voltage rise and fall.

Online UPS
Online UPS is the most advanced and expensive UPS. The inverter continuously supplies clean power from the battery, and the computer device does not receive power directly from the AC outlet. However, online devices contain cooling fans that generate noise and may require some location planning for home users or small offices.

Three UPS types
When the power supply fails, all UPS systems switch to the battery. The difference is how they handle power under normal conditions. The spare unit provides limited attenuation, while the line interaction system will adjust the voltage and eliminate unwanted harmonics. The online system is constantly rebuilding clean energy.

Size is important
When the power is off, the right device will allow more devices to run longer than the left because the battery is larger. Battery size is an important criterion when choosing a UPS system.

Enhanced backup
In Daopulse, all modules share the total load.
Therefore, any unit can fail and be replaced without compromising the safety that the UPS is intended to provide.