975-0697-01-01
49
Stacking Features
This guide for use by qualified installers only.
7.
Select
Stack Mode
and press
Enter
.
8. For Parallel Stacking: Select
Slave
and press
Enter
.
9. Press the
Func
button repeatedly until the
System
Status
screen appears.
NOTES:
The only situation in which the Slave may shut down the
Master inverter is during fault conditions such as high or low
battery voltage, overcurrent, or over-temperature conditions.
Both inverters will auto reset after a fault condition has been
cleared. The exception is that an overcurrent condition will
generate a shutdown for both inverters that will require a
manual restart of the system.
Search Mode Operation in Parallel
Stacking
When two inverter/chargers are stacked for parallel operation,
search mode behavior on the Slave unit is modified and is
dependent on how much total load is on the system.
Disabling Search Mode on the Master Unit
In parallel stacking, search mode on the Master unit will not
function properly. When the Master sends out a load search
pulse, a small current also flows into the output of the Slave
unit since the two outputs are in parallel. This Master unit
falsely detects a load causing erratic search mode operation.
For this reason, it is highly recommended to disable search
mode on the Master unit in a parallel stacking system.
Setting Search Mode on the Slave Unit
The Slave unit will behave in one of two ways depending on
whether its search mode is enabled or disabled.
Search mode enabled
This is the recommended mode for
parallel stacking and it helps minimize battery draw. The
Slave unit continuously monitors the output of the Master
unit. If the Master unit has more than 60% of the rated load
Figure 19 Stacking
Menu Screen
FSW3524 00: Stacking
Dev Name
Dev Number
Stack Mode
AC In
Battery
[00]
[01]
[Master]
[SHORE1]
[Batt1]
[*Master] [Slave] [L2Master]
[*SHORE1] [SHORE2
to
5] [GEN1
to
5] [None]
FSW 230V Installation Guide.book Page 49 Tuesday, August 7, 2018 9:18 AM