how u calculate ups battery backup

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how u calculate ups battery backup..

Answer / k.prakashchandra

Stored energy = V x AH watt.hours Back up time in
hours=stored energy/load in watts.If the batteries are in
series total voltage is to be considered and if in parallel
total AH is to be considered

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how u calculate ups battery backup..

Answer / sathishkumar

battery backup calculations
Assumption battery bank cumulative voltage is equal to load
voltage
Q=1.25*total load current/i.e 0.8)

where the q=total capacity of the Battery Bank in Amp.hour.
and 0.8 is Battery efficiency coefficient for Lead Acid
batteries.

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