Xantrex Freedom SW 230V, Руководство по установке

Страница: 67 / 86

975-0697-01-01 53
Stacking Features
This guide for use by qualified installers only.
Examples
Example 1: System composed of two stacked Freedom SW
2524-230s. Each Freedom SW 2524-230 has a maximum charge
capacity of 65A.
The industry’s commonly accepted practice suggests a typical
Flooded battery bank capacity (
C
) of 400Ah should not be
charged beyond 25% of its capacity (100A). Therefore, when
configuring the two stacked Freedom SW chargers, each
charger may have a
maximum allowable charger output
current of 50A (400
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 100A
(50A + 50A).
To set the
Max Chg Rate
(%) setting in each Freedom SW 2524-
230:
1. Divide the maximum allowable charger output current of 50A
by the Freedom SW 2524-230’s maximum charge capacity of
65A.
So, 50
/
65, gets an approximate value of 0.77 (or 77%)
which can be roughly reduced to 75%.
2. Set the
Max Chg Rate
(%) setting to
75
which means 75%.
In this example, the actual output current is limited to 75% of
65A which is 48A. Therefore, the actual System Total BULK
output current comes out to just under 100A.
Example 2: 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 400Ah should not be
charged beyond 25% of its capacity (100A). Therefore, when
configuring the two stacked Freedom SW chargers, each
charger may have a
maximum allowable charger output
current of 50A (400
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 100A
(50A + 50A).
To set the
Max Chg Rate
(%) setting in each Freedom SW 3524-
230:
1. Divide the maximum allowable charger output current of 50A
by the Freedom SW 3524-230’s maximum charge capacity of
90A.
FSW 230V Installation Guide.book Page 53 Tuesday, August 7, 2018 9:18 AM