Xantrex 815-3012-02, Руководство пользователя

Страница: 63 / 76

Wiring Schematic
975-1057-01-01 64
maximum possible 150A charger capacity is set to a
Max Chg
Rate
of 100 (%) then its full 150A 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.
NOTICE
BATTERY DAMAGE
Configure the charger to ensure that it does not exceed the
battery manufacturer’s recommended maximum charge
specifications to prolong battery life and to exhibit best
performance.
Failure to follow these instructions can result in battery damage.
Examples
Example 1:
System composed of two stacked Freedom SW-RVCs. Each
Freedom SW-RVC has a maximum charge capacity of 150A. The
two stacked inverter/chargers connected to the same battery
bank can possibly produce a total of 300A.
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-RVCs, 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-
RVC:
1. Divide the maximum allowable charger output current of
50A by the Freedom SW-RVC’s maximum charge capacity
of 150A.
So, 50 / 150, gets an approximate value of 0.33 (or 33%)
which can be roughly reduced to 30%.
2. Set the
Max Chg Rate (%)
setting to 30 which means
30%.
In this example, the actual output current is limited to 30% of 150A
which is 45A. Therefore, the actual System Total BULK output
current comes out just under 90A.