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Specifications
900-0167-01-00 Rev A
75
Calculating Limits
If other numbers are needed than those featured in Table 21, the results can be calculated. Do not use
the calculations on page 33, due to charger efficiencies and other factors.
To calculate the chargers and settings:
1.
Look up the values for
A
,
B
, and
C
.
A
= the battery bank’s maximum charge current (in Adc) from the battery manufacturer.
B
= the maximum DC output of the appropriate inverter model. This is taken from Table 22.
C
= the maximum AC input of the appropriate inverter model. This is taken from Table 22.
2.
Select a value for D and perform the following calculation.
D
= the
Charger AC Limit
setting. This value must be 12 or higher. (See pages 49 and 73.) A higher value
uses fewer chargers and turns off all others. A lower value, or 12, leaves more chargers on.
3.
Perform the following calculation.
__
A
__
(C) ÷ D = E
B
E
= the number of chargers to use. This number should be rounded down in all cases.
4.
Adjust the master inverter’s
Charger AC Limit
setting to equal
D
.
5.
Turn off the chargers for all inverters that exceed
E
. In a system stacked on the HUB communications
manager, chargers on higher-numbered ports should be turned off first. Chargers should be turned off by
setting the
Charger Control
menu item to
Off
. (See the menu tables beginning on page 76 to locate this
command in the menu structure.)
Table 22
Charge Currents for Calculations
Model
Maximum DC Output (sent to battery)
Maximum AC Input (used from source)
FXR2012A
100 Adc
14 Aac
VFXR2812A
125 Adc
18 Aac
FXR2524A
55 Adc
14 Aac
VFXR3524A
82 Adc
20 Aac
FXR3048A
35 Adc
14 Aac
VFXR3648A
45 Adc
20 Aac
Firmware Revision
This manual applies to inverter models with Revision 001.006.xxx or higher.
Updates to the inverter’s firmware are periodically available. These can be downloaded from the
OutBack website
www.outbackpower.com
. See page 14.
Default Settings and Ranges
NOTES:
Certain items are retained at the present setting even when the inverter is reset to factory
defaults. These items are noted with the letter “X” in the Item column.
Certain items, particularly those in the Auxiliary menus, share common set points. If one of these