Outback FX-R Series Installation Manual

Installation
42 900-0166-01-01 Rev A
Power Save
IMPORTANT:
In any system that features slave inverters,
Power Save
must be programmed before commissioning.
Leaving the inverters at the factory default settings (or setting them incorrectly) will cause erratic system
performance. See the FXR Series Inverter/Charger Operator’s Manual for a table of menu items and
settings. See the system display literature for navigation instructions.
Each FXR inverter uses 34 watts of idle power while turned on, even if it is not actively inverting or
charging. The
Power Save
function can put part of a parallel system into a “sleep” state (Silent
mode) to minimize the idle consumption. The inverters will activate again when the loads require
power. (The term “Silent” is also used in an unrelated context during battery charging.)

Every time the load increases by an additional 12 Aac, the master inverter activates an additional slave
inverter for assistance. When the load decreases to 4 Aac or less
per active inverter
(as detected by
the master), one slave is deactivated and returns to Silent mode.

The order in which slaves activate (or return to Silent mode) is controlled by programming in the system
display. 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.

The lowest-ranked inverters do not enter Silent mode. This includes the master and subphase master
inverters. They remain active unless specifically turned off. These inverters can still enter Search mode.
Figure 32 Power Save Levels and Loads
The actual watt and ampere thresholds for activating FXR inverters are depicted on the
following pages.
IMPORTANT:
It is highly recommended to use the Profile Wizard in a MATE3-class system display to set up this
function. It is essential to set the slave
Power Save Levels
in sequential order so that they turn on and
off correctly. The Profile Wizard automatically programs the correct priorities.
To set these items manually without the Profile Wizard:
In the system display, the
Power Save Ranking
screen uses
Power Save Level
selections to
assign ranks to the inverter on each port. The screen reads
Master Power Save Level
or
Slave
Power Save Level
, depending on the inverter’s stacking designation.
The stacking designations also control which ports are used on the HUB10.3 communications
manager. The master inverter must be plugged into port 1. In parallel stacking, any slave inverter
can use any other port, beginning with port 2. In series or three-phase stacking, the port
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