Battery Bank Design Tool for wiring battery banks Using the most popular and widely available battery sizes, this design tool can show you how to wire your battery bank. Configurations are possible for AmpHour capacities from as little as 300 AmpHours to over 4000. To use the Designer, follow these 4 simple steps : Click 2, 4, 6, or 12 volt batteries to build your Battery Bank.System Sizing Estimator · Wire Size Calculator · Easy 5 Step Guide Wiring Your Battery Bank In Series Parallel Using any eight 6V batteries group them into two groups of four. Wire each group positive to negative will give you 24V on the furthest negative and positive post not wired to another battery. Then with the two groups, wire them together positive to positive and negatives to negative to give you 500Ah.