Battery Characteristics; Connecting Batteries In Series - Redback A 4506 Operating Manual

4.0 Calculating Battery Size
Before wiring any batteries to the charger it is important to calculate the battery size required for the PA system you are
installing. Figure 3 demonstrates the formula to calculate the required battery size.

5.0 Battery Characteristics

Before connecting batteries to the charger it is recommended that the batteries be equalised as shown in Fig 4.
Batteries should also be connected in series to create a 24V battery source as shown in Fig 5.
** PLEASE NOTE: The A 4506 and A 4512 are 24V battery charging systems. **

Connecting batteries in series

It is common practice to connect 6V or 12V batteries in series to
create a 24V battery source.
To Charger +
+
6V Battery
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4
Calculating battery size for PA systems
Total amplifier power in watts
Battery Size =
500W amplifier
=
Battery Size
Therefore a 40AH battery would be suitable Please note: This calculation
assumes 100% duty cycle at full power output into full rated load.
Equalising batteries
Connect in parallel overnight (10-12 hours
minimum) prior to connecting them to the
charger. Failure to do this can cause a severe
inbalance in the charging of the batteries causing
permanent damage.
+ +
6V Battery
6V Battery
4 x 6V batteries = 24V total battery voltage.
x 1.5 =
Volts
500
x 1.5 = 31.25AH
24
Fig 3
+
6V Battery
+
6V Battery
+
+
12V Battery
6V Battery
+
+
12V Battery
6V Battery
12V batteries connected
in parallell.
6V batteries connected
in parallell.
Fig 4
To Charger +
To Charger -
+
12V Battery
+
2 x 12V batteries = 24V total battery voltage.
6V Battery
Fig 5
Required
amps for
1 hour
To Charger -
+
12V Battery