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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
1
(that is, 1000 x 25% x
/
) into the common battery bank as
2
described in the Calculations section. Also, the System Total
BULK output current is calculated as 250A (that is, 125A +
125A).
54
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
Freedom SW 230V Installation Guide
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