Product Manual

Operation
900-0145-01-01 Rev B 39
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
GS3548E contains only one 4kW module. Activating one module is the same
as activating the full inverter. The GS7048E contains two modules and
operates differently. Do not confuse the behavior of each. See Figure 12 and
Figure 13 for differences.
Figure 11 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
Minimal load
Increasing load
High load
On
Maximum load