54
Freedom SW 230V Installation Guide
Stacking Features
So, 50
/
90, gets an approximate value of 0.56 (or 56%)
which can be roughly reduced to 55%.
2. Set the
Max Chg Rate
(%)
setting to
55
which means 55%.
In this example, the
actual
output current is limited to 55% of
90A which is 49A. Therefore, the
actual
System Total BULK
output current
comes out just under 100A.
Example 3:
System composed of two stacked Freedom SW
3524-230s. Each Freedom SW 3524-230 has a maximum charge
capacity of 90A. The two stacked Freedom SW 3524-230 inverter/
chargers connected to the
same battery bank
can possibly produce
a total of 180A.
The industry’s commonly accepted practice suggests a typical
Flooded battery bank capacity (
C
) of 1000Ah should not be
charged beyond 25% of its capacity (250A). Therefore, when
configuring the two stacked Freedom SW chargers, each
charger may have a
maximum
charger output current of 125A
(that is, 1000
x
25%
x
1
/
2
) into the common battery bank as
described in the Calculations section. Also, the System Total
BULK
output current
is calculated as 250A (that is, 125A +
125A).
To set the
Max Chg Rate
(%) setting in each Freedom SW 3524-
230:
1. Divide the
maximum
allowable charger output current of 125A
by the Freedom SW 3524-230’s maximum charge capacity of
90A.
So, 125
/
90, gets an approximate value of 1.39 (or 139%)
which means that even when the charger is operating at
100% full power, the battery bank can more than
adequately accept the current the charger is delivering.
2. Set the
Max Chg Rate
(%)
setting to
100
which means 100%.
There is no setting beyond 100%.
In this example, the
actual
output current is limited to 100%
of 90A which is 90A. Therefore, the
actual
System Total
BULK
output current
comes out to 180A.
Example 4:
System composed of two stacked Freedom SW
3524-230s. Each Freedom SW 3524-230 has a maximum charge
capacity of 90A. The two stacked Freedom SW 3524-230
inverter/chargers connected to the
same battery bank
can
possibly produce a total of 180A.
The industry’s commonly accepted practice suggests a typical
Flooded battery bank capacity (
C
) of 600Ah should not be
charged beyond 25% of its capacity (150A). Therefore, when
configuring the two stacked Freedom SW chargers, each
charger may have a
maximum
charger output current of 75A
FSW 230V Installation Guide.book Page 54 Tuesday, August 7, 2018 9:18 AM