Looking for good UPS

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KrzysiekX10

KrzysiekX10

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Apr 6, 2014
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Hi.
I'm looking for a good uninterruptible power supply for my PC set.
This is what need:
-The total maximum power draw of all the connected devices is going to be 1739W (1137W from PC, 500W from speaker set and 102W from the monitor),
-In case of power shortage, I would like the battery to be able to work for at least 5 minutes at the power draw of 1739W,
-I would like the UPS to be as quiet as possible. I would prefer it to be silent when working on power from the wall and make noise only when working on the battery (during the power shortage).
Any recommendations?
 
Solution
kira70591
You could get a measurement device such as a Kill-A-Watt. This inexpensive device would give you a real measurement on what you are drawing from the wall instead of some calculator that could be way off. Use it for a couple of days and see what the average is for your power draw and you could buy a UPS according to that. I would also put the PC under full load with a benchmark to draw out the maximum amount of power which you could also use to base your purchase off of. UPS price can skyrocket when dealing with higher capacities.
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laviniuc

laviniuc

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Nov 29, 2013
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such a high power ups is gonna cost an arm and a leg. the problem is the very high power needed for the small interval, you're looking for a 10kWh+ ups.

your best option is to hook a normal sized ups to just the pc and set it to immediately power off after 1min of battery use.
(that way you get a clean shutdown atleast and avoid small power spikes messing your hardware)
 
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kanewolf

kanewolf

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May 29, 2013
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You are at the top end of a 15A circuit in the USA. You don't say what voltage you have, but for a UPS with that wattage, I would recommend a used commercial unit on e-bay. Buy it without batteries and purchase new batteries and install them.

But I also am suspect of your numbers... 102W for the monitor would be VERY high for a flat panel monitor unless it was multiple monitors or a 40in+ display. Are your numbers measured values or "book" values from somewhere?

A quick check of APC's website shows that for an 1800 W draw, you need a 3000VA UPS to get 5+ min holdover.
 
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KrzysiekX10

KrzysiekX10

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Apr 6, 2014
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The values for the monitor and speakers power draw are taken from the producents' websites and the power draw for the PC power supply is calculated by (provided power)/(efficiency) - 1000W/0,88.
BTW, I live in Europe. The voltage of home electricity here is 230V.
 
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KrzysiekX10

KrzysiekX10

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Hmm... I would need to press one more button when turning the computer on LOL, but it's actually quite a nice idea.
 
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kanewolf

kanewolf

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With 230VAC you should be able to get sufficient size. Your 1000W powersupply (even with 0.88 efficiency) probably isn't using nearly 1100W unless you have multiple top-end graphics cards. Here is a good consumed power estimator http://extreme.outervision.com/psucalculatorlite.jsp

I wouldn't recommend the speakers be on a UPS. Are they that critical? A good power strip / surge protector should be sufficient for speakers. The monitor should be on UPS since you need it to manually shutdown. Whatever UPS you choose, I also recommend installing (and testing) the automatic shutdown software.
 
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KrzysiekX10

KrzysiekX10

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OK, thanks for all the advice, I think I already have an idea of what I want to do:
PC and monitor on Cyberpower Value 2200 and maybe speakers on Cyberpower Value 800 - altogehther going to cost an equivalent of 480$, relatively little.
Could somebody please confirm, that this is a good idea?
 
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P

Pondering

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Dec 7, 2013
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Is the Cyberpower Value 2200 1320 watts? http://forums.whirlpool.net.au/archive/1752600

It might be cheaper to get a good quality 1500va 900 Watts unit and swap out the battery as needed since it seems like you get outages quite often.

www.amazon.com/APC-SMC1500-Smart-UPS-Interface-Uninterrupted/dp/B007ZT2KKM/

or get a better 2200va unit due to the cost of your equipment

Also look into getting new surge protectors since you will need to plug the larger UPS into a wall socket by itself and leave the other socket unoccupied and then extend it with a long surge protector plus this will minimize charging sound so you will want the large UPS furthest away.

Maybe get a basic UPS for the monitor such as the www.amazon.com/APC-BE550G-Back-UPS-Outlet-550VA/dp/B0019804U8

I ran a 300 watt tower and a 19 inch CRT monitor on an energizer 400va 200watt unit for 30 seconds so the 200 watt units are good enough for 5 to 6 minutes on the monitor.

I have no idea what to say about the speakers. Try the speakers on the 200 watts UPS for the monitor and go from there.

 
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kira70591

kira70591

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Feb 2, 2014
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You could get a measurement device such as a Kill-A-Watt. This inexpensive device would give you a real measurement on what you are drawing from the wall instead of some calculator that could be way off. Use it for a couple of days and see what the average is for your power draw and you could buy a UPS according to that. I would also put the PC under full load with a benchmark to draw out the maximum amount of power which you could also use to base your purchase off of. UPS price can skyrocket when dealing with higher capacities.
 
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