Choose a battery bank voltage and work out the series and parallel arrangement.
Series connections add voltage while parallel strings add capacity. Higher bank voltage means lower current for the same power, which reduces cable size and losses substantially. A 48 V bank carries a quarter the current of a 12 V bank for the same power, which is why anything above about 1 kW uses 48 V.
Battery Bank Voltage
Series count = target voltage ÷ battery voltage; parallel strings = target Ah ÷ battery Ah
Series count = target voltage ÷ battery voltage; parallel strings = target Ah ÷ battery Ah Series connections add voltage while parallel strings add capacity. Higher bank voltage means lower current for the same power, which reduces cable size and losses substantially.
A 48 V bank carries a quarter the current of a 12 V bank for the same power, which is why anything above about 1 kW uses 48 V.
This calculator takes 4 inputs: Target system voltage, Voltage of each battery, Capacity of each battery, Target bank capacity. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.