5
Connecting the Batteries in Series
Why Connect in Series?
When batteries are connected in series, current capacities remain the same, but the system voltage is additive. For
example, two
BB
GC3 batteries connected in series form a nominally 24V system (shown in Fig. 4) and should be
charged
u
sing a bulk and absorption voltage of 28.8V, and a float voltage of 27.2V.
How to Make a Series Connection
Note:
Battle Born
GC3
b
atteries are capable of being connected in series up to 48V.
DO NOT
exceed a 48V setup or you will void the
battery’s warranty
.
1.
Before making any connections, make sure to charge each battery up to 14.6V with a proper lithium charger.
ALL
B
ATTERIES SHOULD BE AT THE SAME STATE OF CHARGE PRIOR TO CONNECTING, otherwise you will
encounter balance issues within your system. You can check your battery’s state of charge with a multimeter.
2.
Identify the positive and negative terminals. These are labeled and color-coded
red for positive (+)
,
black
f
or negative
(–).
3.
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.
4.
Make the proper cable connections to the negative terminal of the first battery. Please reference Fig. 1 for
the
proper order of hardware.
5.
When connecting to your battery terminals,
DO NOT
finger tighten. Use a torque wrench to torque your
hardware
t
o the specification of 9 to 11 ft-lbs. Failure to adequately secure connections can result in severe
damage and will void your warranty.
6.
Connect the other end of your cable to the positive terminal of the other battery you are connecting to. Repeat
step
4
.
7.
Repeat steps 3-6 for additional batteries, but
DO NOT
exceed 48V. An example of a correct series connection
can be found below in Fig. 4.
Figure 4:
Two GC3
Batteries Connected in Series to create a 24V 270Ah Battery Bank
How to Properly Charge the Batteries
To properly charge your
Battle Born
b
atteries, you will want to verify that any charging component in your system
is
c
apable of being programmed for the following specifications. Charging components can include, but are not
limited to converters, inverter chargers, solar charge controllers, DC to DC chargers, etc.
• Bulk/Absorption: 14.2V – 14.6V
• Absorption Time: 60-90 minutes per battery (for parallel string)
• Float: 13.4V – 13.8V
• Equalization: 14.4V/ Disabled
• Temperature Compensation: 0/Disabled
•
Charge Rate: .5c
•
Battery Charge Temperature Range: 25°F (-3°C) to 135°F (57.2°C)
•
Battery Discharge Temperature Range: -4°F (-20°C) to 135°F (57.2°C)
•
Cell
Charge Temperature: 32°F (0°C) to 131°F (55°C)
•
Cell
Discharge Temperature: 68°F (20°C) to 140°F (60°C)
NOTE: Not all chargers are capable of multistage charging. If yours is not, you will want to verify it can be programmed for the Bulk/Absorption voltage and have
the other items mentioned disabled if applicable. Consult your charger’s manual or the manufacturer
.
Battle Born Batteries
BB
GC3
Manual
