Outback FX-R Series Installation Manual

Installation
44 900-0166-01-01 Rev A
Figure 33 Power Save Priority (Parallel)

The fourth line shows that loads of 36 Aac or more (approximately 4 to 4.5 kW) are present on the
system. This load causes all four inverters to be activated.

The last line shows that the loads are reduced to 16 Aac. Since this load is distributed among four
inverters, the master reads 4 Aac, the lower threshold for Power Save. This causes one slave to enter
Silent mode. The 16 Aac are distributed among the remaining three inverters. If the loads decreased to
12 Aac, a second slave would go silent.
Figure 34 shows a system of six FXR2012A inverters. In this example the inverters have been
stacked in a split-phase system. The master inverter is on the L1 output while a subphase master
is on L2. Each master has two slave inverters.

The captions at the top indicate the ranking of each inverter.

The captions also show the communications manager port assignments. The L1 inverters use ports 1, 2,
and 3. However, the communications manager requires the L2 inverters to use ports 7, 8, and 9.

The notations at the bottom show how the inverters are activated in sequence as loads are applied. The
loads on L1 and L2 are not applied equally, so they are not activated at the same time.
Figure 34 Power Save Priority (Split-Phase)

The fourth line shows that loads of 36 Aac or more (approximately 4 to 4.5 kW) are present on both L1
and L2. This load causes all six inverters to be activated.

The last line shows that the loads on L1 are reduced to 11 Aac. This causes one slave to go silent. The
loads on L2 are reduced to 7 Aac, causing two slaves to go silent.
Maste
r
Slave 1 Slave 3 Slave 2
Port 1
Master Power
Save = 0
Port 2
Slave Power
Save = 1
Port 4
Slave Power
Save = 3
Port 3
Slave Power
Save = 2
<12 Aac On Off Off Off
12 Aac On On Off Off
24 Aac On On On Off
36 Aac On On On On
16 Aac On On On Off
L1 Maste
r
L1 Slave 1 L2 Sub
p
hase L1 Slave 2
Port 1
Master Power
Save = 0
Port 2
Slave Power
Save = 1
Port 7
Master Power
Save = 0
Port 3
Slave Power
Save = 2
L1 Load L2 Load
9 Aac On Off Off 9 Aac On Off Off
12 Aac On On Off 9 Aac On Off Off
24 Aac On On On 18 Aac On On Off
36 Aac On On On 36 Aac On On On
11 Aac On On Off 7 Aac On Off Off
L2 Slave 1 L2 Slave 2
Port 8
Slave Power
Save = 1
Port 9
Slave Power
Save = 2