UPS power consumption penalty

Sep 18, 2008 7 Replies

I measured the power consumption of a computer at 140 watts using a 'killowatt" power meter. Then I plugged the computer into my Belkin UPS and measured the increase in power drawn by the UPS at 200 watts.



Is the extra 60 watt penalty expected?



70% efficient, not to good but what ever.

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It might be your power meter is reading noise from a poorly filter witching supply giving a false reading. Try inserting a line filter between your meter and the unit.

No. But perhaps the UPS is charging its batteries. A low cost UPS should not consume more than a few watts when idle.

Programmeren in Almere? E-mail naar nico@nctdevpuntnl (punt=.)

Apart from the other answers, you have to watch out that the computer is identically occupied with work in both tests. I used a power meter to monitor my computer, and found these figures -

hibernating 1 W standby mode 93 W on, idling 127 W decoding MP3s 178 W encoding MP3s 205 W running Quake 4 294 W

John

Guess empirical testing shows it to be true!

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Takes a lot of power to make a quake, doesn't it?

Well, If I was dealing with a witching supply, I think I would also have some unexplainable events! :)

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