Calculate max runtime for UPS

Hello, I was wondering if anyone knew how to calculate max runtime for for an UPS.  I have the UPS table infront of me right now.  It shows something like
Load (VA)     Load (watts)     SU700     SU1000     SU1400
50               30                    142         224           269
100             60                     76          127           157
200             122                   37           64            80

How exactly would one determine the Load (VA), Load (watts)?

Thanks in advance,
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CallandorConnect With a Mentor Commented:
The run time can be calculated by looking at MikProg's answer (the accepted answer) here:
joshuaemoryAuthor Commented:
Thanks a lot for the help Callandor.  I'll give it a try.
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