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• Overcurrent protection in the load center in accordance with NFPA
70, §705.12.and NEC 690.
• Suitable mounting hardware: use #8 (or larger) screws that are long
enough to secure the unit to the vertical mounting surface.
• Copper conductors rated for wet locations and sized to meet local
code requirements and voltage drop/rise considerations. Wire sizes
and torque values are listed on the door of the unit.
• UL-Listed rain-tight conduit hubs for wire entry into the enclosure.
D ) For consumption metering, check that there is enough space in the
load center to install CTs. Do not install the CTs in a panel where they
exceed 75% of the wiring space of any cross-sectional area within the
load center.
E ) Decide how to connect the IQ Gateway to the Internet: Use Wi-Fi and
Enphase Mobile Connect modem or Ethernet. Then, ensure you have
the following optional items, if needed:
• Enphase Mobile Connect modem (included with X2-IQ-AM1-240-
4C)
• Ethernet over power line communication (PLC) bridge with Ethernet
cables (order EPLC-01). If you choose this option, you must install an
Enphase accessory receptacle (order XA-PLUG-120-3) inside the IQ
Combiner 4/4C.
• Ethernet cable: 802.3, Cat5E or Cat6, unshielded twisted pair (UTP).
Do not use shielded twisted pair (STP) cable. You must install a
ferrite bead (we recommend Fair-Rite 0431167281) as close as
possible to the IQ Gateway on the Ethernet cable.
When installing with an Enphase Energy System system, both Enphase
Mobile Connect modem and additional Internet connection (Wi-Fi or
Ethernet) are required.
F ) Make note of the IQ Gateway serial number on the installation map.
Later, you will need to enter this number in Installer App. You can type
it in manually or scan the label on the inside of the combiner door.
Always keep a copy of the installation map for your records.
G ) Note that installation of the IQ Combiner 4/4C has two parts: To
ensure successful device detection, complete Part 2 after installing
any Enphase IQ Microinverter, Enphase IQ Battery, and Enphase IQ
System Controller.
INSTALLATION — Part 1
Complete this section BEFORE installing Enphase
Microinverters, Enphase IQ Battery, and Enphase IQ System Controller.
1
Choose a location for the IQ Combiner
A ) Install the IQ Combiner 4C or IQ Combiner 4 in a readily accessible
location, at least three feet (91 cm) off the ground.
B ) Consider the dimensions of the IQ Combiner, easy access, box height,
and length of cable when selecting the location. The IQ Combiner is
rainproof but not watertight.
C ) Mount the IQ Combiner 4C or Q Combiner 4 on a vertical surface.
NOTE: You must mount the IQ Combiner within a 15 degrees range
of vertical orientation.
Install Circuit Breaker(s)
2
The combiner includes one two-pole 10 A circuit breaker that feeds the IQ
Gateway and the AC outlet (if present). You can install additional break-
ers, if needed. You must follow all NEC and local electrical codes. For
IQ8 grid-forming systems, this breaker must not be used to power the IQ
Gateway and the procedure described in steps C and D must be followed.
For IQ6/IQ7 and IQ8 grid-tied systems, skip the steps C and D.
A ) Open the enclosure door. Pinch the top of the hinge rod using a pair of
needle-nosed pliers. Slide the door up and remove it. Set the door aside
for later reattachment.
NOTE: Risk of equipment damage. Do not remove the pre-installed heat
shield attached to the enclosure door.
Always unplug the USB cable from the IQ Gateway USB port before
removing the dead front.
2
Figure B: Combiner 4 units with clamp-type Consumption CTs
LOAD CENTER
L1
MAIN
LUG
C T
TO PV
TO MAIN
LOAD
CENTER
NOTE: On-grid forming IQ8 Systems, the IQ Gateway L1 and L2 must
NOT be wired to the combiner circuit breaker. The IQ Gateway L1 and L2
may be wired to:
•
A double pole breaker on the generator breaker spot in IQ System
Controller if the spot is unused
•
A double pole breaker on the backed-up loads subpanel
•
A quadplex (BQC220240 or BQC215240) breaker on the NFT break-
er position in IQ System Controller
Warning! Risk of electric shock. To maintain the warranty,
do not modify the dead front other than to remove or replace
filler plates.
B ) Remove the plastic dead front with the integrated cell modem on
the dead front. It is not necessary to completely remove the
screws.
C ) For IQ8 installations, there are three ways of installing the IQ Gate-
way breaker:
Option 1: Remove the IQ Gateway breaker from the combiner and
use the pre-installed breaker in the generator space in IQ System
Controller for connecting the IQ Gateway if a generator is not
present at a site.
Option 2: Remove the IQ Gateway breaker from the combiner and
place it in a protected subpanel if it is available nearby and has
space for the breaker.
Option 3: If the subpanel is far away and a generator is available,
then replace the BR240 NFT breaker with a quad breaker BRK-
20A40A-2P-240V and connect IQ Gateway to the outer poles of the
quad breaker.
D ) For IQ8 grid-forming system installations, run wires from L1 and
L2 terminals on the IQ Gateway terminal block through the PV
conduit to the location where IQ Gateway breaker is installed
according to the options listed above.
E ) Remove a filler plate on the dead front for each breaker position
you use. To remove the filler plate, press the single latch inward
while gently pushing the filler plate out.
F ) Snap the breaker onto the busbar, using only the breaker positions
indicated in the diagram on the door of the unit.
IQ GATEWAY
RECOMMENDED ETHERNET
CABLE ROUTING
Junction
clip
L2
NE Filter
Board
AC
NEUTRAL
TO IQ
TO
BAT TERY / PV
IQ Sytem
Controller
(IF PV, MUST PASS THROUGH
PRODUC TION C T )
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