Specs on SUA1000XL run times

[Anonymous user]

The run time chart at http://www.apc.com/products/runtime_for_extendedruntime.cfm?upsfamily=164 shows some very odd-looking numbers for the SUA1000XL with and without one battery pack:

SUA1000XL @ 420VA (300W) = 51 minutes
SUA1000XL @ 420VA (300W) + SUA24XLBP = 210 minutes

I have the SUA1000XL+SUA24XLBP fresh out of the box here, waited until it was fully charged, and did a run-time calibration. PowerChute Business Edition Console shows only 96min runtime with a constant 42% UPS load (336W I assume).

Why is there an approximately two-fold decrease in actual run times vs. your run time chart? Run times this bad don't appear on your chart until there is a 600W load applied.

Message was edited by: bapriebe

[Anonymous user]

Will give it another day and try out your suggestion.

Only parameter that was modified was addition of 1 battery pack. Everything else is plain vanilla.

[BillP]

i think the best thing to do would be to let the UPS charge for 24-48 hours and then remove the serial cable and let the UPS/battery pack discharge without any software interaction until it completely turns off. then let it charge back up and see what you get.

also, did you edit any of the settings within PCBE like low battery signaling time?

[Anonymous user]

Pulled the serial cable and disconnected the UPS from main power. It then discharged completely. Reconnected to main power and both the UPS and PCBE now show the batteries fully recharged and a new runtime of 163min with a 55% UPS load. This would appear to be better than advertised spec. Am now doing another run-time calibration for confirmation. This SUA1000XL exhibits behaviour I've never seen before (I have 3 other SU1000XLNET's): the battery status drops instantly from 100% to 64% and the runtime dropped to 91min.

Is there something I'm missing or is one of these batteries not charging properly?

Message was edited by: bapriebe

[BillP · Accepted solution]

please keep in mind it is not a good idea to do a runtime calibration more than 1-2 times a year at most. this will degrade the batteries and shorten the life of them over time.

i personally would not be paying attention to what the software is reporting versus the actual runtime you are receiving since the software is just using a calculation. lets make sure we are going off of the actual runtime being reported.