Batteries Calculation Design

Ask the UPS manufacturers.

With the information you've given you can't expect an answer.

enen if we have 5 KVA UPS DC voltage require 108 V. But the same 5 Kva some manufacturers are using 430 V Dc also who will decide those things what is the factor to be considered

Study Ah of battery.

Talk to the UPS manufacturer.

For same power ratings you can have different input voltage requirements, if you choose lower input voltage AH rating of battery required will be higher, with the law of proportion.

Energy required to lift 10kg stone to 1 meter height= Energy required to lift 1kg stone to 10 meter height, (g is constant)

Note- in general higher input voltage UPS are more efficient,

Adding to post #5, higher voltages make the UPS more efficient. The cost of a given watt-seconds capacity in a battery of a type is usually lower with a smaller number of cells - there is less weight and space used on casings and interconnections rather than plates and electrolyte. This has to be balanced against the economies of a higher voltage and the possibility that a higher voltage system can be more powerful and more efficient.