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This guide for use by qualified personnel only.
Battery Cabling and Hook-up Configurations
Several smaller batteries can be connected to create a battery
bank of substantial size. You can connect batteries in three
ways: in parallel, series, or series-parallel.
To make a larger battery bank, connect individual batteries
with heavy cables. The actual size of the cable depends on
whether the batteries are connected in parallel or series.
Generally, the cable should not be smaller than the inverter
cables—if the main cables are 4/0 AWG, the battery
interconnects should be 4/0 AWG.
The best configuration is to connect the batteries in series and
parallel. This requires additional cables, but reduces
imbalances in the battery bank and can improve the overall
performance. Consult your battery supplier for more
information regarding the hook-up configuration required for
your system.
Battery Parallel Connection
Batteries are connected in parallel when all the positive
terminals of a group of batteries are connected and then,
separately, all the negative terminals are connected. In a
parallel configuration, the battery bank has the same voltage
as a single battery, but an Ah rating equal to the sum of the
individual batteries. See below.
Figure 23
Batteries Connected in Parallel
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