Xantrex Technology 815-2524-02, 815-3524 To set the Max Chg Rate % setting in each Freedom SW

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 × 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 3524-230:

1.Divide the maximum allowable charger output current of 50A by the Freedom SW 3524-230’s maximum charge capacity of 90A.

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.

Stacking Features

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	only.
beyond 25% of its capacity (250A). Therefore, when configuring

the two stacked Freedom SW chargers, each charger may have a

section. Also, the System Total BULK output current is calculatedpersonnel
maximum charger output current of 125A (that is, 1000 × 25% × 1/ )
	2
into the common battery bank as described in the Calculations
as 250A (that is, 125A + 125A).
1.	Divide the maximum allowable charger output current of 125A qualified
To set the Max Chg Rate (%) setting in each Freedom SW 3524-230:
	by the Freedom SW 3524-230’s maximum charge capacity of	by
	90A.	use
	So, 125 ÷ 90, gets an approximate value of 1.39 (or 139%)	for
	which means that even when the charger is operating at 100%
		guide
	full power, the battery bank can more than adequately accept
	the current the charger is delivering.	This
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.

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