Filter
Top Products
48 Freedom SW 230V Installation Guide
Stacking Features
each parallel branch of batteries. Therefore, the above
generalizations of maximum charge rate (%) can be made for the
entire battery bank.
The Freedom SW 230V’s Max Chg Rate (%) setting defaults to
100 (adjustable from 0 to 100). So if the Freedom SW 3524-230
charger with a maximum possible 90A charger capacity is set to a
Max Chg Rate of 100 (%) then its full 90A of current can be
delivered into the battery bank. However, if this is too high, the
installer/operator may reduce the Max Chg Rate setting to suit the
system battery type and bank requirements (and limitations), to
avoid overheating the battery bank.
The user/installer is responsible of configuring the charger to ensure
that the battery manufacturer’s recommended maximum charge
rate current (in Amps) is not exceeded to prolong battery life and
to exhibit best performance.
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 × 25% ×
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.
Freedom SW 3K2K 230V InvChg Install Guide.book Page 48 Friday, June 20, 2014 9:11 AM