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Offline UPS vs Online UPS

ByAnthony Hendriks

Feb 3, 2014

Have you ever been in a situation when the computer suddenly shuts down because the power went off, while still working on some documents? This is rather unwanted situation and can be very frustrating since you end up loosing all the work you’ve don. To avoid such situations, it is best to invest in uninterrupted power supply devices that supply your computer with enough power to continue working even when the primary power is off. You can choose between offline and online Ups.

The Ups power supply contains a battery that turns on when it senses that the power will go off and gives you extra time to save any data you have been working on. Not only that this device acts like backup power supply, but it also acts like power ‘conditioner’ that provides proper flowing of electricity to your computer and prevents any drops or surges from happening. As mentioned above, the most common categories of modern Ups power supply systems are online Ups and offline Ups. Here are some differences between the two.

  • Offline Ups is a type of uninterrupted power supply that connects directly to the AC power supply. If the mains supply fails, the offline Ups uses the switching delay to deliver power to the load via internally connected battery that uses DC-AC inverter circuitry. Unlike the offline Ups, the online Ups uses the DC-AC inverter in the battery directly to deliver power to the load. The online Ups does not require a switching mechanism but uses its reserves since it continuously supplies power to the load.
  • Offline UPS charges the connected batteries during normal power supply but since the power is bypassed to the load, it can cause some electrical noises. Therefore, this type of uninterrupted power supply is not recommended for sensitive and critical electronic devices. However, the online Ups supplies power to the device from the batteries at all times. The uninterrupted power supply first charges the batteries and then discharges them in order to power the load. Thus with the help of the online Ups, the load is always getting clean power regardless of the power problems that might show up. Due to that, the online Ups is recommended for sensitive and critical devices.

By Anthony Hendriks

The life of the party, Anthony is always up for spending some time with family and friends, when not blogging of course! Ever since a child, his love for books of mystery, race cars and travelling keeps on growing so it's difficult for him to single out that one all-time favourite hobby. If there's one thing he hates, though, it's having pictures taken but you already guessed that from his choice of plant photo for the blog.

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