How long should a 1000VA/600W UPS keep a computer in sleep mode running?

[yamas111]

Let's say that only the computer and monitor are plugged into it, the monitor is turned off and the computer is in sleep mode.

How long will the UPS battery last before before it fully drains?

 

[BigBadBeef]

Each computer is different. You will need to take a power consumption measuring device, take some readings and so some math.

 

[yamas111]

What's the formula to figure it out?

 

[BigBadBeef]

Capacity divided by current. Example:

1800mAhrs / 20 mA = 90hrs

 

[Rojlani]

My PC needs 100-130W. The 560W UPS shows the battery will last 25-30min.

 

[yamas111]

hmm ok, math isn't my best subject, but I'm going to assume that my computer uses maybe 20 watts in sleep mode. So if my UPS has a 600W capacity, it would be

600/20 = 30 hours?

 

[photonboy]

1) The TIME it lasts is stated at the manufacturer or store site.

2) Be WARNED that many models don't work. If you have a PFC circuit (any "80 plus" model must) in the power supply then you need a UPS that supports PFC (adequate sine wave).

*Cyberpower has models with "PFC" right in the name:
http://www.newegg.com/Product/Product.aspx?Item=N82E16842102132&cm_re=pfc-_-42-102-132-_-Product

3) SLEEP MODE:
The UPS only kicks in when there is no power from the wall, so it's not really an issue.