Battery Cabling And Connections; Battery Parallel Connection - Xantrex 815-3012-02 Manual

5 BATTERY CABLING AND CONNECTIONS

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.
975-1057-01-01

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 21 Batteries Connected in Parallel
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