Answer Posted / mehboob

( Battery Voltage * AH Rating * Efficiency) / VA Rating =  X
X * 60 = Estimated Run Time in Minutes




So let’s pretend we’re looking at a theoretical UPS unit that has the following specs:




VA Rating: 700
Battery Voltage: 12
AH: 9
Efficiency: 0.9 (90%)




When we plug those numbers into the equation we get the following:




( 12 * 9 * 0.9 ) / 700 = 0.139
0.139 * 60 = 8.3 minutes

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