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Parallel Stacking
A parallel stacking configuration allows the inverter and charger capacity of a system to be doubled. Parallel-stacked
inverter/chargers can operate from different battery banks, meaning each unit is connected to its own battery bank. However, it is
highly recommended to only use a single battery bank similar to series stacking. See on page 35.
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 15
n
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 15 RJ45 CAT5e/6 network cable for parallel stacking
D
Line and Neutral Wiring for Parallel Stacked Inverters
AC IN L2 terminals on both units must not be connected at all. Also for parallel 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.
In a stacked pair configuration, connect the two AC input neutrals together at the main distribution panel (SOURCE) and the two
AC output neutrals at an isolated neutral location in the inverter AC distribution sub-panel (INVERTER LOAD).
975-0998-01-01
c
Do not connect any wires to the AC INPUT L2 terminals on both units at all when stacking.
A
First Freedom EX 4000
A
B
RJ45 CAT5e/6 network cable connected
to the Sync ports of each Freedom EX
4000
B
C
NOTICE
C
Second Freedom EX 4000
D
RJ45 CAT5e/6 network cable connected to the
RV-C ports of each Freedom EX 4000
including the network terminators.
Basic Installation Procedures
29
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