8 Replies Latest reply: Aug 17, 2009 11:27 AM by mathmoi RSS

Is something wrong with my UPS Calibration or with PowerChute software?

mathmoi Member
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Last friday I've done a calibration of a brand new SUA750XL with one SUA24XLBP attached. I used a 150 watts lamp as the only load and unplugged the UPS from the wall. The power from the batteries lasted for 8 hours 34 minutes. That's a bit longer than what can be estimated from the APC website.

Now, with the normal load attached (one 24 ports switch, 3 routers, 2 modems, 1 WIFI access point) PowerChute indicate a load of 0.8A. That's about 100 watts. PowerChute also estimate that the UPS can make this run on batteries for only 488 minutes or 7 hours 8 minutes. This seems wrong to us. The UPS powered a 150 watts lamp for 8.5 hours and is now estimating just over 7 hours for a 100 watts load.

Can there be something wrong with PowerChute estimations (by the way we declared 1 battery pack in PowerChute for our SUA24XLBP. Is this Ok?) or can there be something wrong with the calibration process.

Message was edited by: mathmoi

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