Outback Power Systems GS4048A Operators Manual - Manual (Page 40)

Operation
38 900-0161-01-00 Rev A
Power Save
Each inverter consumes approximately 30 watts of idle power while it remains on, even if it is not
actively inverting or charging. The Power Save function allows the option to put part of a parallel
system into a quiescent state known as Silent mode. This mode minimizes the idle consumption.
The inverters will come on again when the loads require power. (The term “Silent” is also used in an
unrelated context during battery charging. See page 30.)
 When the load increases by approximately 2.5 kW, the master inverter activates one or more additional
modules for assistance. When the load decreases to a lesser wattage (as detected by the master), the
modules deactivate and return to Silent mode. Additional load increments of approximately 2.5 kW will
activate additional modules.
 The first module in the master does not enter Silent mode. It remains active unless specifically turned off.
 The order in which additional modules activate (or return to Silent mode) is controlled by programming in
the MATE3. The inverters are given a “rank”, or level number. Lower rank numbers activate when lesser
loads are applied. Higher ranks only activate when the load increases to a high level.
IMPORTANT:
Power Save functionality is different between Radian models. The Radian GS4048A
contains only one 4kW module. Activating one module is the same as activating the full
inverter. The GS8048A contains two modules and operates differently. Do not confuse
the behavior of each. See Figure 10 and Figure 11 for differences.
Figure 9 Power Save Levels and Loads
The actual watt and ampere thresholds for activating each model are depicted on the following pages.
IMPORTANT:
It is highly recommended to use the MATE3 Configuration Wizard to set up this function.
It is essential to set the slave Power Save Levels in sequential order. Failure to set them
up correctly will cause erratic system performance. The Configuration Wizard
automatically programs the correct priorities. (See the MATE3 owner’s manual.)
To set these items manually without the Configuration Wizard:
In the MATE3 system display, the
Power Save Ranking screen uses Power Save Level selections to
assign inverter ranks. The screen reads Master Power Save Level or Slave Power Save Level,
Master Slave 1 Slave 3 Slave 2
Off Off Off
On Off Off
On On Off
On On On
On
On
On
Increasing load
Minimal load
High load
On Maximum load