Trace Engineering DR Series Owner’s Manual - Version 3.2 - 9/7/98 - Page 19
Battery Hook-up Configurations
Battery banks of substantial size are generally created by connecting several smaller batteries
together. There are three ways to do this. Batteries can be connected in parallel, series, or series -
parallel.
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, and an amp/hour rating equal to the sum of the
individual batteries. This is usually only done with 12 volt battery-inverter systems.
Series Connection
When batteries are connected with the positive terminal of one to the negative terminal of the next,
they are connected in series. In a series configuration, the battery bank has the same amp/hour rating
as a single battery, and an overall voltage equal to the sum of the individual batteries. This is common
with 24 volt or higher battery-inverter systems.
Series - Parallel Connection
As the name implies, both of the above techniques are used in combination. The result is an increase
in both the voltage and the capacity of the total battery bank. This is done very often to make a larger,
higher voltage battery bank out of several smaller, lower voltage batteries. This is common with all
battery-inverter system voltages.
12V 12V
12V 12V
+ + +
+
+
_ _ _ _ _
TOTAL BATTERY
BANK CAPACITY:
400 AMP-HOURS
@ 12 VDC
EACH BATTERY
CAPACITY:
100 AMP-HOURS
@ 12 VDC
6V 6V
6V 6V
+
_ _
+
_
+ + +
_ _
TOTAL BATTERY
BANK CAPACITY:
200 AMP-HOURS
@ 24 VDC
EACH BATTERY
CAPACITY:
200 AMP-HOURS
@ 6 VDC
6V 6V
6V 6V
12V INVERTER
+
_
_
+ + + +
_
_ _
EACH BATTERY
CAPACITY:
200 AMP-HOURS
@ 6 VDC
TOTAL BATTERY
BANK CAPACITY:
400 AMP-HOURS
@ 12 VDC
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