Answer / jagannathan.i

AH CALCULATION= KVA*OUTPUT POWER FACTOR*NO OF HOURS BACK
UP/DC LOW VOLTAGE* INVERTER EFFICIENCY*BATTERY UTILIZATION
FACTOR

BACKUP TIME= (BATTERY AH*BATTERY UTILIZATION FACTOR/DC
CURRENT)*60

Answer / k.k dash

back up time calculation formula is=volts*no of battery*ah*60*0.7/va

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