Installation Guide

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Multiple strings of batteries can be wired in parallel to increase the capacity. Figure 9.6 shows
a battery bank with two strings of batteries. Each string consists of two 12V batteries in series.
For example, if wiring four 12V/150Ah batteries like as shown in Figure 9.6, then each string will
have a total capacity of 24V/150Ah. By paralleling these strings, the total capacity would be
24V/300Ah.
Because of this, it is mandatory that the batteries are identical.
Each parallel string can also consist of 4x6V batteries to make 24V per string as shown in
Figure 9.5 . Remember that the negative cable from the controller to the battery should be
placed at the opposite end of the battery bank.
9.5 Series-Parallel connection of batteries (24V)
Figure 9.6
Four 12V batteries connected in series – parallel