Discuss the battery sizing for UPS application with following UPS specifications applicable to the battery. 1. Size = 8 kVA at 0.8 power factor 2. Inverter efficiency = 93 % at full load 3. Maximum input dc voltage = 150 V 4. Low voltage cut-out = 105 V The user specifies that the UPS must power critical loads for minimum of 45 minutes following a loss of normal power. The user believes that the UPS will be almost fully loaded for the entire discharge time.

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