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How many battery required for an 3kva online ups with 3 hrs back up with usage of 3 fans,3tube lights

How many battery required for an 3kva online ups with 3 hrs back up with usage of 3 fans,3tube light..

Answer / shri...

Connected load = 3 Fan (70 watt each approx) + 3 Tube lights (40 Watt each approx)
Load = 330 Watt
Battery back up time 3 Hrs

Required minimum 12V 1 no 120 AH battery

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