Smart-UPS 1000 XL - run time ....

[Anonymous user]

I have a Smart-UPS 1000 XL with 4 battery packs chained off of it...

the management page reports

2.5 hours of run time

Load Power:	6.5 %Watts
Apparent Load Power:	6.5 %VA
Load Current:	0.3 Amps

I have ran a run time calibration ... ,,, it took about  32 hours to complete,,, and still report 2.5 hours...

is 2.5 hours the actual runtime on battery ??? or is it 32 hours ?

[BillP · Accepted solution]

Based on this, it certainly seems like it should be reporting closer to the 32 hours -> http://www.apc.com/resource/include/ups_runtime_chart.cfm?base_sku=SUA1000XL&family_id=165

I think that for a calibration to work well on most units, the load needs to be at least 30% and not fluctuate +/- 5%. So, perhaps it did not update properly because your load is so low on this unit.

I understand you want the runtime to be accurate but if you do more calibrations, whether its manual or a software one with a higher load as I've described, this will cause unnecessary discharges of your batteries. If you do want to calibrate it again, I would not do it unless you can increase the load and if you did do it, I'd probably do it manually since you already tried the software one. Manually requires letting it run with no software attached until it completely turns off (which any load attached would then turn off). Then, you let it charge back up.

Alternatively, you could wait for it to go on battery itself and adjust its own runtime during power outages, knowing you should get about 32 hours.