Which UPS to buy?

By Johnny9183 ·
I have a Dell XPS 8300 and 2 LED monitors. The power specs for the XPS8300 are as follows:

DC Power Supply

Wattage: 460 W
Input Voltage: 115/230 VAC
Input frequency: 50/60 Hz
Output current: 8A/4A

Now I am planning to buy a UPS for battery backup and surge protection. But despite hours of web research and chat with dell support, I am still not sure which UPS to buy. The Dell tech recommended this:

But still I am curious to know what to look for while selecting a UPS. Is more wattage better? Won't it fry the system?

I am confused. Please help!

Thanks in advance.

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All Answers

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The more Wattage the better

by OH Smeg Moderator In reply to Which UPS to buy?

Wattage is just a measure of available power. So if you have a choice between a 50 W and a 1200W the 1200W will run the system for much longer at the stated voltage.

What you have to watch out for is Battery Life in any UPS so you want one with Good Batteries not cheap nasty batteries and ideally Jell Cell Batteries which will not leak in the event of the outer casing being broken.

As for what you listed above it's OK and will give a reasonable amount of time on Battery but to be perfectly honest I'm not sure that it will be much of a Filter to absorb Power Surges and to be perfectly honest if you spoke to Dell you should expect them to recommend something that they sell. Doesn't mean it's better just that they will make money out of the sale.

You should look at local Sellers in your area and see what if anything that they have available. Of course APC UPS's are the best available but they will cost you for the privilege.


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Reponse To Answer

by Johnny9183 In reply to The more Wattage the bett ...

Thanks Col. I was just wondering, is it ok to connect an UPS to a surge protector. So from the desktop's point of view, there will be 2 surge protectors, but I am not sure it will be safe.

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use of surge suppressor

by chacok43 In reply to Which UPS to buy?

Most UPS boxes you buy state that using a surge suppressor or even an extension cord between the wall and the power input to the box will void any warranty. It will actually slow down the switch-over to battery power in the event of an outage. In short, not a good idea.

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Reponse To Answer

by Johnny9183 In reply to use of surge suppressor

Thanks for the tip. I would plug the UPS directly then.

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APC or Tripp-Lite

by TheChas In reply to Which UPS to buy?

I personally recommend APC or Tripp-Lite over Cyber-Power for most users.

APC has a number of guides and white papers to help you choose a UPS.

I am running an older version of this UPS.

This is the APC model similar to the Cyber-Power from Dell.

Keep in mind that for both the monitors and the computer you very seldom use the full power rating. I would expect your typical draw to be around 200 Watts.

In addition to my computer and monitor, I run a cord from the UPS to my DSL modem and primary router.


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Reponse To Answer

by Johnny9183 In reply to APC or Tripp-Lite

Great tip, didn't know that you don't use full rating always. Thank you!

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Try the new APC Smart-UPS 1000

by elibarikikilewo In reply to Which UPS to buy?

APC Smart-UPS 1000 has a new LCD alpha/numeric display providing detailed and accurate information previously restricted only to software or NMC. it also include flash upgradeable firmware and the most importantly it saves more time and it holds 3 year warrant

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Confusion over UPS and SPS

by trevorkrause In reply to Which UPS to buy?

There is a bit of confusion over what is a UPS (un-interrupible power supply) and what is a SPS (stand-by power supply).
The SPS normally runs the load directly from the mains while charging or trickle-charging the battery. Only on a supply side fault or interruption, the unit in a finite time switches over to the battery until the mains supply is restored.
The UPS maintains only the battery charge from the mains supply. The load takes it power directly from the battery via the inverter always. Therefore there is no changeover or switching of the power supply and any transients or brownouts on the supply side does not effect the load directly as they are separate systems connected only through the battery.
The UPS is not as efficient in energy management as a SPS, but it is much better in maintaining a clean power supply to the load(computer etc).

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Reponse To Answer

by Johnny9183 In reply to Confusion over UPS and SP ...

I didn't know anything about SPS. Thanks for introducing me!

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Reponse To Answer

by TheChas In reply to Confusion over UPS and SP ...

Interesting. By the definitions then, most of the home and small office UPS systems sold in the US are actually SPS systems. I have yet to use a portable "UPS" that runs off of the inverter when main AC power is present.

I would expect that some large building and data center UPS systems are running off the inverter.


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