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the Alpha Group” are trademarks owned and used by Alpha Technologies.
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This is the factory-installed initial position.
Used for classic series, OutBack series, and
parallel stacking. Also used for three-phase
OutBack stacking with models GVFX(E) and
GTFX(E) .
For these applications, place all jumpers in
the positions noted in the photograph and
the diagram.
Used for three-phase OutBack stacking with
FX, VFX, FX(E) or VFX(E) inverters.
For these applications, place only two jumpers
in the positions noted in the photograph
and the diagram.
Remove all remaining jumpers. No others are
used for this configuration.
Jumper position identified by
MATE3 on power-up:
Searching for Devices
Found
HUB10.3
Jumper position identified by
MATE3 on power-up:
Searching for Devices
Found
HUB10.3 Sub-phase Master
Stacking (Parallel)
HUB 10.3
Stacking (Series)
HUB 10.3
Models
FX / VFX (all series,
including E, J, M, N,
and W)
GS8048
GS8048A
GS4048A
GS7048E
GS3548E
GFX
GFX (E Series)
GTFX (E Series)
GVFX (ESeries)
Parallel Stack
Up to 10 inverters or other devices
All inverters use common AC output bus
Master inverter always active; regulates power output based on load
Slave inverters remain in Power Save mode; Master activates
Slave inverters based on load
Output
Single-phase
inverters:
Split-phase
inverters:
Single-phase output
Split-phase output
Jumper position
(see step 4b
on front page)
10 987 6 5 4321
Stack Mode Master or 1-2phase Master
Master (port 1 only)
Stack Mode Slave or OB Slave L1
Slave (port 2, port 3, etc.)
X
st
1
MATE
or
Port 1
Port 2
(with
FX-class
inverter)
Models
FX / VFX (includes
J, M, N Series)
GTFX
GVFX
GTFX (LA Series)
GVFX (LA Series)
GFX
Series Stack (Classic)
2 inverters; up to 8 other devices
Master and single Slave inverter use separate output AC buses
(L1 and L2)
Both inverters always active
(no Power Save mode);
outputs are loaded independently
but output regulation is controlled
by load on Master
Jumper position
(see step 4b
on front page)
Output
Single-phase
inverters:
Split-phase output
10987654321
Slave (L2)
Series Stack (OutBack)
Up to 10 inverters or other devices; requires balancing transformer
Master inverter and half of the Slave inverters use common output AC bus (L1)
The remaining Slave inverters use a separate common AC bus (L2)
Master inverter is always active; regulates output based on load;
can power both L1 and L2 buses using balancing transformer
Slave inverters remain in Power Save mode; Master activates
any Slave inverters for either L1 or L2 based on load
FX / VFX (all series,
including E, J, M, N,
and W)
Output
A
B
C
Three-Phase Stack
3 inverters; up to 7 other devices
Master and two Slave inverters use separate output AC buses (A, B,and C)
All inverters always active (no Power Save mode);
outputs are loaded independently but output regulation
is controlled by load on Master
Single-phase inverters:
Three-phase output
PHASE A
PHASE B
PHASE C
Jumper position
(see step 4c
on front page)
1098 7654321
Stack Mode Master
Master (port 1 only)
Stack Mode 3ph Slave
Slave B (port 4 only)
Stack Mode 3ph Slave
Slave C (port 5 only)
X
st
1
MATE
Port 1
Port 4
Port 5
or
Models
GTFX (E Series)
GVFX (E Series)
Output
A
B
C
Three-Phase Stack
Up to 9 inverters; 1 other device
Master and two Slave inverters use separate output AC buses (A, B,and C)
All inverters always active (no Power Save mode);
outputs are loaded independently but output regulation
is controlled by load on Master
Up to 8 inverters (ports 1 to 4, 7 to 10); 2 other devices (ports 5, 6); No balancing transformer required
Master inverter and half of the Slave inverters use common output AC bus (L1); ports 2 to 4 are L1 slaves
Subphase Master inverter and half of the Slave inverters use a separate common AC bus (2); ports 8 to 10
are L2 Slave inverters despite the screen selection (OB Slave L1)
Port 7 is the L2 Subphase Master despite the screen selection (Classic Slave); this port is required
regardless of the number of Slave inverters
Master and Subphase Master are always active; each type of Master regulates output based on its own load
Slave inverters remain in Power Save mode; Master activates L1 Slave inverters based on its load, while the
Subphase Master independently activates L2 Slave inverters based on its own load
Stack Mode Master
Master (port 1 only)
Stack Mode OB Slave L1
Slave (port 2)
Also ports 3, 4, 8, 9, and 10
Stack Mode Classic Slave
Subphase Master (port 7)
or
Port 1
Port 2
Port 7
Models
GS7048E
GS3548E
GFX
GFX (E Series)
Output
A
B
Single-phase inverters:
Three-phase output
C
PHASE A
PHASE B
PHASE C
Jumper position
(see step 4a
on front page)
Three-Phase Stack (Subphase Master)
Up to 9 inverters (ports 1 to 9); 1 other d evice (port 10 ); M ATE3 on ly
Master inverter (required on port 1) and up to two Slave inverters (ports 3 & 3) use Phase A output AC bus
Subphase Master inverter (required on port 4 ) and up to two Slaves (ports 5 & 6) use Phase B output AC bus
Subphase Master inverter (required on port 4 ) and up to two S lave s (port s 8 & 9) use Phase C o utpu t A C b us
Phase A, B, and C Slave inverters should be equal in number; Slave sele ct ion screen ma y display Slave but
could display OB Slave L1 depending on model
Master and Subphase Masters are always active; each type of Master regulates output based on its own load
Slave inverters remain in Power Save mode; the Master activates Phase A Slave inverters based on its load,
while the Subphase Masters indepen de ntly a ctivate Phase B or C Slave inve rters based on their own loads