Installation Manual

Battery Information
975-0639-01-01 Rev D 1–41
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 1-19 Batteries Connected in Parallel
ConextSW-NA-InstallationGuide.book Page 41 Tuesday, July 21, 2015 4:39 PM