Calculating Battery Capacity For Standby Back-Up Supply

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Calculated total load = Amps (24V supply full load)

Duration required for full load operation during = hrs

Recommended battery capacity = Ah

The above calculation is based on the following assumption.

1. Minimum residual voltage of 30% shall remain in the batteries to avoid over discharge of current.
2. Discharge current is based on 5 Amp/hour.
3. Duty cycle of load at amplifiers are at 20% average.

Note : The battery capacity required may vary according to brands type of batteries used (SLA or NiCd).