Battle Born Batteries GC3 Manual
4
Connecting the Batteries in Parallel
Why Connect in Parallel?
Multiple BBGC3 batteries may be connected in parallel to increase the capacity and current of the system. When
batteries are connected in parallel, the voltage of the system does not change, but the capacity and current limits are
additive. For example, two BBGC3 batteries connected in parallel (shown in Fig. 3) create a 12V 540Ah bank that can
deliver 600A continuously and 1,000A for 30 seconds.
How to Make a Parallel Connection
NOTE: All cables and connections MUST be able to accommodate the high currents that can be delivered by the battery. Appropriate fuses and
circuit breakers are highly recommended to protect downstream components from current spikes and short circuits.
1. Identify the positive and negative terminals. These are labeled and color-coded
red for positive (+)
,
black for
negative (–).
2. Determine the appropriate finishing hardware set you will use. Verify that your bolt can fully seat into
the nylok insert of the nut. If multiple lugs are used, longer bolts may be required for the bolt to fully seat into
the nylok insert of the nut.
3. Make the proper cable connections to the positive terminal of the first battery. Please reference Fig. 1 for the
proper order of hardware.
4. When connecting to your battery terminals,
DO NOT
finger tighten. Use a torque wrench to torque your hardware
to the specification of 9 to 11 ft-lbs. Failure to adequately secure connections can result in severe damage and will
void your warranty.
5. Connect the other end of your positive cable to the positive terminal of the other battery you are connecting to.
Repeat step 4.
6. Repeat steps 3-5 for the negative connections.
7. Repeat steps 3-6 for additional batteries in the system. An example of a finished connection can be found below in
Fig. 3
Figure 3:
Two GC3 Batteries connected in Parallel to create a 12V 540Ah Battery Bank
Figure 2:
Proper and Improper Terminal Connections
