Xantrex Freedom EX 4000 Installation Manual page 27

Series Stacking
A series stacking configuration allows two inverters to be configured to produce 120 and 240 VAC, also known as, a single-phase
three-wire configuration. For example, a Freedom EX 4000 can be installed as L1 while another Freedom EX 4000 operates as L2.
However, it is important to remember that for series stacking configuration, only AC IN L1 | AC OUT L1 terminals should be used
and that the AC IN L2 | AC OUT L2 terminals must have no connections at all. If L2 is connected to any incoming or outgoing AC
line, the inverter/charger may suffer internal damage not covered by warranty.
GENERAL PRECAUTIONS
Contact Xantrex prior to stacking two Freedom EX 4000 units together. Stacking configuration via USB is a required step to
n
enable stacking.
Install stacked Freedom EX 4000s in close proximity to each other.
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Connect RJ45 CAT5e/6 straight-through network cables to each inverter's Sync port as well as the RV-C ports shown in Figure 13
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below.
Do not connect any wires to the AC IN L2 | AC OUT L2 terminals on both units at all when stacking.
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Each inverter must be enabled and turned on individually before AC power becomes available.
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Failure to follow these instructions can result in equipment damage and may void the warranty.
Figure 11 Series Stacking Using Two Freedom EX 4000s
B
AC IN AC OUT
L1 N L2 G L1 N L2 G
D
E
AC IN AC OUT
L1 N L2 G L1 N L2 G
G
EQUIPMENT DAMAGE
Do not connect any wires to the AC IN L2 | AC OUT L2 terminals on both units at all when series
stacking.
Failure to follow these instructions can result in equipment damage and may void the warranty.
975-0998-01-01
A
SHORE
C
SHORE
NEUTRAL BUS
COMMON
BUS
F
NOTICE
NOTICE
c For illustration purposes only. Not all electrical connections are shown.
INVERTER LOAD
The □ icon is a circuit-breakered main line connection to the line bus.
A RV AC Disctribution panels with AC
breakers for shore and inverter load
(downstream) circuits
B First Freedom EX 4000
C AC output cable with individual wire L
connected to the inverter's L1 terminal
and to the inverter load sub-panel's 50A
INVERTER L1 pole. Also jointly connects to a 20A
NEUTRAL BUS
pole.
D AC input cable with individual wire L
connected to the inverter's L1 teminal
and to the shore panel's 50A L1 pole.
COMMON
BUS
Basic Installation Procedures
E Second Freedom EX 4000
F AC output cable with individual wire L
connected to the inverter's L1 terminal
and to the inverter load sub-panel's 50A
L2 pole. Also jointly connects to a 20A
pole.
G AC input cable with individual wire L
connected to the inverter's L1 teminal
and to the shore panel's 50A L2 pole.
c
Do not connect to the inverter's L2
terminals in both units.
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