enphase IQ Combiner 4 User manual

QUICK INSTALL GUIDE
PREPARATION
A ) Download the Enphase Installer App version 3.X mobile app and open it
to log on to your Enphase App account. With this app, you can connect to
the IQ Gateway to track system installation progress. To download, go to
enphase.com/toolkit.
B) Check the box for the following items:
• Enphase IQ Combiner 4 or 4C with IQ Gateway printed circuit board.
The X-IQ-AM1-240-4C also includes an LTE-M1 cell modem.
• A pair of split-core consumption metering CTs
• Enphase IQ Combiner 4/4C Quick Install Guide (this document)
C ) Make sure you have the following required items:
• An Ensemble Communications Kit (COMMS-KIT-01 ) is not included. It is required for
all Ensemble installations and must be purchased separately. (only for installations
with IQ battery or IQ System Controller)
• Tools: screwdriver, pliers, and torque wrench.
• Up to four Eaton BR-style breakers (one for each PV branch circuit). Eaton BR-style
breakers are the only breakers you can use. You can install 10A, 15A, 20A, 30A, 40A,
50A, or 60A breaker(s) in the IQ Combiner (order Enphase BRK-10A-2-240V, BRK-
15A-2-240V, BRK-20A-2P-240V, Eaton BR210, Eaton BR215, Eaton BR220, Eaton
BR230, Eaton BR240, Eaton BR250, and/or Eaton BR260 circuit breakers). The sum
of all Distributed Energy Resources (DER) branch breaker ratings cannot exceed 80
A. For IQ8 systems with IQ System Controller, use BRK-15A-2P-240-B for 15A cir-
cuits and BRK-20A-2P-240-B for 20A circuits to be compatible with the hold down
kit. You can also use Eaton BR215B and Eaton BR220B breakers for IQ8 systems.
The IQ Gateway breaker should not exceed 10 A and is counted separately (total
90A worth of breakers).
• Up to two hold-down kits with screws for the breakers. Each hold-down kit (X-IQ-NA-
HD-125A) will allow installation of up to two breakers located on the same side of the
busbar (Only for IQ8 PV installations with IQ System Controller).
• 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 require-
ments 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, make sure you have
the following optional items, if needed:
(Model X-IQ-AM1-240-4C and X-IQ-AM1-240-4)
How It Works
Installing the Enphase IQ Combiner 4 and
Enphase IQ Combiner 4C
The Enphase IQ Combiner 4
and/or the IQ Combiner 4C combine up to
four AC branch circuits of Enphase IQ
Series Microinverters and/or Enphase
IQ Battery batteries.
To install the IQ Combiner 4 or 4C, read
and follow all warnings and instructions in this guide.
Safety warnings are listed on the back of this guide.
If you do not fully understand any of the concepts,
terminology, or hazards outlined in these instructions, refer
installation to a qualied electrician or installer. These instructions
are not meant to be a complete explanation of a renewable energy system.
All installations must comply with national and local electrical codes.
Professional installation is recommended.
The IQ Combiner 4C and 4 have an outdoor-rated, NRTL-certied
NEMA type 3R enclosure containing an Enphase IQ Gateway™, circuit breakers,
a pair of split-core consumption metering CTs, and wiring for IQ Gateway connections.
The IQ Combiner 4C includes a Enphase Mobile Connect™ LTE-M1
cell modem. Use the IQ Combiner 4C for single-phase applications and to support the
AC connections needed for an Enphase residential solar installation.
Generator
(reserved for future use*)
Enphase Cloud
• Enphase Mobile Connect modem (included with X-IQ-AM1-240-4C)
• Ethernet over power line communication (PLC) bridge with Ethernet cables (or-
der 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 Ensemble system, both Enphase Mobile Connect mo-
dem, and additional internet connection (wi 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/or Enphase IQ System Controller.
IMPORTANT: The IQ Gate-
way inside the IQ Combiner is
required to monitor performance
of the IQ microinverters and to
communicate with IQ Battery and
IQ System Controller.
IQ GATEWAY
P1 C1 C2
1 2 3 4
NO
Ref
Common
C
Digital Input Relay
PD, B300
OVC II
L1 L2
N
CU, 75C, 14AWG MIN MEAS CAT III OVC III
Production | Consumption
RECOMMENDED ETHERNET
CABLE ROUTING
LOAD CENTER
L1 L2
TO IQ
BATTERY / PV
TO MAIN
LOAD
CENTER
AC
NEUTRAL
MAIN
LUG
(IF PV, MUST PASS THROUGH
PRODUC T ION C T )
TO PV
CT
Junction
clip
Note: On grid forming IQ-8
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, or
-- A double pole breaker on the
backed-up loads sub-panel, or
-- A quadplex (BQ220240 or
BQ215240) breaker on the NFT
breaker position in IQ System
Controller.
Refer to the Quick Install Guide
for details.
NE Filter
Board
TO
IQ Sytem
Controller
(optional)

INSTALLATION — Part 1
It is best to complete Installation Part 1 BEFORE installing Enphase
Microinverters, Enphase IQ Battery and/or Enphase IQ System Controller.
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 15 degrees of vertical.
1
Warning! Risk of electric shock. To maintain the warranty,
do not modify the dead-front other than to remove or replace
ller plates, as needed.
Wire the Output Connections
Refer to the diagram on the door of the IQ Combiner 4C and do the following:
A ) Use conductors sized per local code requirements taking into consid-
eration the voltage drop/rise and upstream breaker or fuse.
B ) The two terminals below the circuit breaker(s) are the output connec-
tions. Install L1 into the left terminal and L2 into the right terminal.
C ) Connect the neutral (white) to the neutral busbar.
D ) Connect the ground (green or green/yellow) to the Ground busbar.
E ) Torque all connections as indicated by the table below.
4
Wire Inputs from the AC Branch Circuits
You can install AC branch circuit breakers up to 80 A total (sum of handle
ratings, excluding the 10 A breaker). With individual branch circuits, you will
typically use up to four 20 A breakers. Refer to the diagram on the door of
the IQ Combiner and do the following:
A ) Use copper conductors sized to meet local code requirements and
voltage drop/rise considerations.
B ) Bring in the wires from each AC branch circuit.
C ) Connect the ground (green or green/yellow) to the ground busbar.
D ) Pass the L1 conductors from each PV branch circuit through the produc-
tion CT in the same direction as the arrow on the side of the CT.
E ) If you use the fourth (Battery/PV) breaker position for PV, you must route
the L1 conductor through the production CT.
NOTE: Do not pass conductors from AC Battery branch circuits through
the production CT. This will distort production readings. The IQ Battery
circuits must terminate on the load side of the consumption CTs.
F ) Connect L1 and L2 (usually one black and one red) from each AC branch
circuit (PV and/or battery) to the circuit breaker(s). Observe the L1 and
L2 polarity marking at each breaker position.
G ) Torque all connections as indicated by the following table.
H) For IQ8 installations, you must install hold down kits for the breakers
for PV branch circuits as per the NEC code. Refer to the installation
instructions of the hold down kit for installing the hold down kit for IQ8
systems.
5
NOTE: Enphase IQ Series Microinverters use a two-wire system and do
not use a Neutral. However, the IQ Gateway in the combiner still requires
a Neutral from the load center.
Warning! Risk of equipment damage. Observe bend radius
requirements when routing wires.
CONNECTION WIRE SIZES TORQUE
Eaton BR series DG breaker(s) 14-10 AWG
8 AWG
6-4 AWG
2.2 Nm (20 in-lb)
2.8 Nm (25 in-lb)
3.0 Nm (27 in-lb)
60 A circuit breaker only 4-1/0 AWG 5.0 Nm (45 in-lb)
Neutral and ground
Large screw
Small screw
14-1/0 AWG
14 - 6 AWG
5.0 Nm (45 in-lb)
2.2 Nm (20 in-lb)
Main lug 10-4 AWG
3-2/0 AWG
5.0 Nm (45 in-lb)
5.6 Nm (50 in-lb)
Copper conductors only, rated minimum 75°C. Follow NFPA 70 (NEC) or
CSA C22.1 part 1 and all local codes.
For DG breakers larger than 20 A, use wire insulated for 90°C based on
75°C ampacities.
The busbar supports a maximum of 90A of circuit breakers including 4
x 20A PV breakers and 10A of IQ Gateway breaker.
Drill Holes to Accept Conduit
A ) The bottom and sides of the IQ Combiner 4/4C are the best locations
to drill holes for conduit ttings. Rear conduit entry below the busbar
assembly is also supported.
NOTE: When drilling, consider the internal parts of the combiner. Make
sure that the holes do not interfere with the internal workings, mechan-
ics, or the deadfront legs in the corners of the combiner.
Best Practice: Use a stepped drill bit to make the conduit holes. Using
a hole saw may crack the plastic housing. As an alternative, use a sharp
chassis punch with caution.
Warning! Risk of equipment damage. Do not drill conduit
holes on the top of the box or at any location that allows
moisture ingress.
Install Circuit Breaker(s)
The combiner includes one two-pole 10A 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 IQ
8 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
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: a) Risk of equipment damage. Do not remove the
pre-installed heat shield attached to the enclosure door.
b) Risk of equipment damage. Always unplug the USB cable from the IQ
Gateway USB port prior to removing the deadfront.
B ) Remove the plastic deadfront with the integrated cell modem on
the deadfront. It is not necessary to completely remove the screws.
C ) For IQ8 installations, there are three ways of installing the IQ Gateway
breaker:
Option 1: Remove the IQ Gateway breaker from the combiner and
put it into the generator breaker space in IQ System Controller for IQ
Gateway connection if Generator is not present
Option 2: Remove the IQ Gateway breaker from combiner and put it in
a protected subpanel if it is available nearby and has space for breaker
Option 3: If subpanel is far away and 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 installations, run wires from L1 and L2 terminals on the IQ
Gateway terminal block through PV conduit to the location where IQ
Gateway breaker is installed as per the options listed above.
E ) Remove a ller plate on the deadfront for each breaker position you
will use. To remove the ller plate, press the single latch inward while
gently pushing the ller plate out.
F ) Snap the breaker onto the busbar, using only the breaker positions
indicated in the diagram on the door of the unit.
B ) Use a snap punch or other type of center punch to prevent the drill
from wandering. Drill a pilot hole with a smaller drill before using a
step drill bit.
C ) Use only UL-listed rain-tight hubs for wire entry into the enclosure.
3
2

A ) Make sure that the main load center wires are de-energized until you
have secured the CT wires in the terminal blocks.
B ) Before running the CT wires through the conduit, use colored tape to
mark one of the CTs and the free end of its wires.
C ) For the marked CT wires, connect the white and blue wires to the white
and blue “C1” terminals.
D ) For the unmarked CT wires, connect the white and blue wires to the
white and blue “C2” terminals.
E ) Tighten all connections to 5 in-lbs.
F ) Clamp the marked CT on the load center feed wire Line 1 (matching the
IQ Gateway’s “L1” voltage terminal) with the CT arrow pointing toward
the load (away from the grid).
G ) Clamp the unmarked CT on the load center feed wire Line 2 (matching
the IQ Gateway’s “L2” voltage terminal) with the CT arrow pointing
toward the load (away from the grid).
Install CTs for Consumption Metering (Mandatory for Enphase Storage Systems)
The IQ Gateway printed circuit board inside the IQ Combiner 4C or IQ Combiner 4 is pre-wired at the terminal blocks for power and production metering connections.
One solid-core current transformer (CT) is provided for revenue grade production metering. A pair of split-core CTs are provided for consumption metering. To install
them, create a protected route using conduit for the CT wires from the main load center to the IQ Gateway. If you need to extend the wires, refer to the Enphase IQ IQ
Gateway Installation and Operation Manual at: enphase.com/support.
NOTES: It is important to match CT and sense voltage phases.
To properly measure power and energy, CT inputs must align with the
respective voltage inputs. Be sure to consistently identify and match the
two AC lines at two points: the main load center feed and the IQ Gate-
way. Wire colors (typically black and red) may not always consistently
identify Lines 1 and 2. If in doubt, use a multimeter to check.
6
NOTE: Because of variance in load center design and main power feed, there may not always be enough space to install consumption metering CTs.
DANGER! Risk of electrocution! Do not install CTs when cur-
rent is owing in the sensed circuit. Always install CT wires
in the terminal blocks before energizing the sensed circuit.
Load Center
To Grid
From IQ Combiner
IQ Gateway Terminal Block
Relay contacts
(if needed)
UP TO 250 Vac.
100A 0.5V 45-66Hz
white
blue
Not used
white
blue
P1 C1 C2
1 2 3 4 NO
Ref
Common
C
Digital Input Relay
PD, B300
OVC II
L1 L2
N
CU, 75C, 14AWG MIN
MEAS CAT III
OVC III Production | Consumption
Consumption CTs
The arrows must point
toward the load — away
from the grid.
DANGER! Risk of electric shock. Always de-energize the load
center before beginning wiring.
Energize and Update the IQ Gateway
A ) Re-install the plastic deadfront with the LTE-M1 cell modem in-
stalled on the deadfront. Do not completely tighten all of the screws.
B ) Once all screws are partially tightened, go back and tighten each
one completely.
C) Plug in cell modem USB cable into an IQ Gateway USB port
D ) Turn off the DG breaker(s).
E ) Reinstall the IQ Combiner 4C door.
F ) Turn on the circuit feeding the combiner.
G ) Log into the Enphase Installer App on your mobile device and down-
load the latest version of IQ Gateway software. To do so, go to the
Settings tab in the Enphase Installer App and select Download Now
under IQ Gateway Software.
H ) On the IQ Gateway (inside the combiner), if the AP Mode LED is not lit,
press the AP Mode button.
I ) On your mobile device, go to Settings and join the Wi-Fi network “IQ
Gateway_nnnnnn” (where “nnnnnn” equals the nal six digits of the IQ
Gateway serial number).
J ) Log into the Enphase Installer App on your mobile device and update the
latest version of IQ Gateway software. To do so, go to the Settings tab
in the Enphase Installer App and select Update Now under IQ Gateway
Software.
K ) For a short period (5-10 minutes), you must keep your mobile device
near the combiner. Follow the on-screen instructions while the
update takes place.
The IQ Gateway software update process may take up to 25 minutes.
During the software update, the LEDs on the IQ Gateway ash green one
at a time from right to left. During this time, the IQ Gateway will reboot
multiple times. All four LEDs ash red when the IQ Gateway reboots.
Once the update is nished and the PV system is installed, the IQ Gate-
way is ready for Installation Part 2.
All four LEDs ash red during boot up (approximately 3 minutes). When
boot up is complete, the Device Communications LED lights solid
red, indicating that devices are not yet detected.
7

8
INSTALLATION — Part 2
You must complete Installation Part 2 AFTER installing any Enphase
Microinverters, Enphase IQ Battery and/or Enphase IQ System Controller.
Detect Devices
A ) Turn on the DG breaker(s).
B ) Use one of the following methods to detect devices:
Method A: Provision Devices with Enphase Installer App
Use the Enphase Installer App mobile app to congure
the IQ Gateway with the serial numbers of the installed
devices.
A ) Launch the Enphase Installer App app and tap
Systems.
B ) Select the system you are working with, or tap [+]
to add a system.
C ) Make sure that the system details are added (Step
1) and that an appropriate grid prole is set for the
system as shown.
D ) Go to Devices & Array (Step 2) and add the total
number of devices of each type in the system. Tap
edit if you need to edit previously entered data.
E ) Make sure to tap each device type and scan the
devices using the camera scanner. You can also
create arrays or assign microinverters to arrays.
F ) Connect to the IQ Gateway with your mobile
device (smart phone or tablet). The AP mode
LED lights solid green when the network is
available
• On the IQ Gateway if the AP mode LED is
not lit, Press the AP mode button.
• On your mobile device, go to Settings and
join the Wi-Fi network “IQ Gateway_nnnnnn”
(where “nnnnnn” equals the nal six digits of
the IQ Gateway serial number).
G) Input tarrif details in Enphase Installer App Step3.
H) Go to Step 4 (IQ Gateway connectivity) and make
sure your device is connected to IQ Gateway. Tap
Start provisioning devices.
I) Make sure that all the installed devices are provi-
sioned as shown.
Method B: Discover Devices with
Enphase Installer App
Use the Enphase Installer App mobile app to set the
number of microinverters the IQ Gateway should
search for on the power line.
A ) Launch the Enphase Installer App app and tap
Systems.
B ) Select the system you are working with, or tap
[+] to add a system
C ) Make sure that the system details are added
(Step 1), and make sure that an appropriate grid
prole is set for the system.
D ) Go to Devices & Array (Step 2) and add the total
number of devices in the system. Tap edit if you
need to edit previously entered data.
E). Input tarrif details in Step3.
F ) Connect to the IQ Gateway with your mobile
device (smart phone or tablet). The AP Mode LED
lights solid green when the network is available.
• On the IQ Gateway, if the AP Mode LED is not lit, press the AP
Mode button.
• On your mobile device, go to Settings and join the Wi-Fi network “IQ
Gateway_nnnnnn” (where “nnnnnn” equals the nal six digits of the IQ
IQ Gateway serial number).
G ) Go to Devices & Array and tap PLC scan to add microinverters as
shown.
H ) Tap IQ Battery and IQ System Controller and scan devices using the
camera scanner.
I ) Go to Enphase Installer App Step 5 and tap Provision devices.
The Device Communications LED ashes green while scanning, solid
green when all the devices you installed are communicating, or solid red if
any devices are not communicating.
With both methods
If the Device Communications LED remains solid red, see Troubleshooting b.
IQ Gateway Display and Controls
Network Communications LED
Green when IQ Gateway is connected
to Enphase App.
AP Mode LED
Green when IQ Gateway’s AP Wi-Fi
network is available.
AP Mode Button
Press to enable IQ Gateway’s AP Mode
for connecting with a mobile device.
Hold for 5 seconds to start WPS
connection to a router.
Power Production LED
Green when microinverters are
producing power.
Device Communications LED
Green when devices are
communicating with IQ Gateway.
Device Scan Button
Press to start/stop 15 minute scan for
devices over the power line.
Track system installation progress with the Enphase Installer App version 3.X
mobile app. The LEDs on the IQ Gateway PCB (printed circuit board) are solid green
when a function is enabled or performing as expected, ashing when an operation
is in progress, or solid red when troubleshooting with Enphase Installer App is
required. For a legend of all LED states, see Troubleshooting a.
Enphase Enphase
Installer App
mobile app

Connect to Enphase App over Wi-Fi
To congure Wi-Fi, the cellular modem must not be connected. Requires a
wireless router with an Internet connection.
A) On the IQ Gateway, verify that no Ethernet cable is plugged into the
RJ45 port.
B) On the IQ Gateway, verify that no cellular modem is plugged into the
USB port.
C) If the router supports WPS, press and hold the WPS button on the wire-
less router for a few seconds. On most routers, a WPS indicator begins
ashing.
D) If you are using the Enphase Installer App mobile app, go to your system
and tap Enphase Installer App Step 4 (IQ Gateway connectivity), tap Wi-
Fi, and then tap your network from the list of available networks. If the
wireless router does not support WPS, you may be prompted to enter a
password.
The Network Communications LED begins ashing green. Within three
minutes the same LED lights solid green, indicating a successful connec-
tion to Enphase App. If the Network Communications LED remains off or
lights solid red, see Troubleshooting.
Send System Summary Report
When you have completed your system setup, you
can generate and email a summary report.
A ) From Enphase Installer App, tap step 7 of the
system workow to view the report. The report
displays IQ Gateway and system information
with a list of device serial numbers, their last
power reports, and information about the grid
prole applied to the microinverters as shown.
B ) Tap to email the report to your ofce as a
record of successful system installation or to the
utility for evidence of grid prole settings.
Activate Monitoring
Register the IQ Gateway in Enphase App (enlighten.enphaseenergy.com).
Method A: If the IQ Gateway is associated with a system
in Enphase Installer App
A ) On your mobile device, go to Settings and disconnect from the IQ
Gateway’s AP Wi-Fi network.
B ) Return to the Enphase Installer App app, select your system, and tap
Sync on the upper right corner.
C ) When you have access to a computer, log in to Enphase App and
select the system name from the Activation List on the dashboard.
D ) From the activation form, open Array Builder.
If you used Enphase Installer App to build arrays and scan device serial
numbers, the array(s) are built. Make any necessary adjustments in Array
Builder.
If you did NOT use Enphase Installer App to build arrays and scan device
serial numbers, create the virtual array in Array Builder using the installa-
tion map as your reference.
Method B // If the IQ Gateway is NOT associated with a
system in Enphase Installer App
A ) Log into Enphase App and click Add a New System from the dash-
board.
B ) Enter the System, Installer, Owner, and Location information.
C ) Enter the IQ Gateway serial number.
D ) Click Save to submit the form.
E ) After the devices have reported to Enphase App, open Array Builder
from the activation form, and create the virtual array, using the installation
map as your reference.
12
11
13
Verify System Conguration
While still connected to the IQ Gateway with Enphase Installer App, check
the System screen for the following:
A ) For microinverters, conrm that the expected number of devices are
detected and communicating by navigating to Devices & Array->
Microinverters & Array and check that status is Producing.
B ) Check that the grid prole is set for all the microinverters. Setting the
prole may take up to 5 minutes for a typical system.
C ) To check if IQ Battery and/or IQ System Controller are connected,
navigate to Devices & Array -> IQ Battery or IQ System Controller->
<serial number> and make sure they are communicating.
D ) Tap Step 6 and go to Production Meter and follow the wizard to en-
able the production meter.
E ) Tap Consumption Meter and follow the on-screen instructions to
enable the consumption meter.
F ) Verify the meter readings.
G ) Tap Live Status and conduct functional testing.
If you used Enphase Installer App to detect devices, the Power Production
LED lights solid green when all expected microinverters are producing
power. If you did not use Enphase Installer App, it lights solid green if all
communicating microinverters are producing power. It ashes green when
devices are upgrading. Check Enphase Installer App for production status
details. If the Power Production LED remains solid red, see Troubleshooting
c.
Connect to Enphase App Over Cellular
(Model X-IQ-AM1-240-4C only)
The IQ Combiner 4C includes a cell modem. (The IQ Combiner 4 does not
include the modem.) The Enphase Mobile Connect LTE-M1 cell modem
connects to AT&T’s or Sprint’s LTE-M network. Reference AT&T’s or
Sprint’s LTE coverage maps, if needed.
Conrm that the USB cable between IQ Gateway and the cell modem is
connected at both ends. Use either of the two USB ports on the IQ Gate-
way.
If receiving power from the IQ Gateway, the modem power LED lights.
Within three minutes the Network Communications LED lights solid
green, indicating a successful connection to Enphase App.
If the Network Communications LED remains off or lights solid red, see Trou-
bleshooting in the Enphase Mobile Connect Installation Guide.
Checking Connection Status and Cellular Signal Strength
An IQ Gateway with Mobile Connect automatically reports to Enphase
App. When the IQ Gateway establishes an Internet connection through the
cellular modem, the IQ Gateway Network Communications LED glows solid
green.
You can use the Enphase Enphase Installer App to check the modem status
and cellular signal strength. The IQ Gateway’s AP (Access Point) Wi-Fi
network allows you to connect your mobile device (smart phone or tablet) to
the IQ Gateway.
A) On the IQ Gateway, the AP Mode LED lights solid green when the
network is available. If the AP Mode LED is not lit, press the AP Mode
button.
B) On your mobile device, go to Settings and join the Wi-Fi network “IQ
Gateway_nnnnnn” (where “nnnnnn” represents the nal six digits of the
IQ Gateway serial number).
C) Launch Enphase Installer App, go to your system, and tap IQ Gateway
connectivity.
D) Make sure that the IQ Gateway is connected to your mobile device,
verify the network conguration, view the cellular connection status.
9
10
Warning! If you have already installed and connected the
cellular modem to IQ Gateway, do NOT move the modem to
another IQ Gateway. This will deactivate the modem.

Checking the Cell Modem Status LEDs
The modem has the following status LEDs
• Power
• Link
• Signal
The following tables list LED indicator status. The LEDs may be difcult
to see if you view them from an angle. View the LEDs straight on.
LED Indicates
Off DC power not present
On DC power present
Power
LED Indicates
Flashing slowly
(200ms high/1800ms low)
Network searching
Flashing slowly
(1800ms high/200ms low)
Idle
Flashing quickly
(125ms high/125ms low)
Data transfer is occurring
Link
Signal
LEDs Description Indicates
All off Very weak signal
Bar 1 ON Weak signal
Bar 1 and 2 ON Good signal
Bar 1, 2, and 3 ON Very good signal
Issue Action
No communication
with Enphase App
after connecting the
cellular modem to
the IQ Gateway.
1. Disconnect the USB cable.
2. Power cycle the IQ Gateway.
3. Wait until the IQ Gateway boots
completely.
4. Reconnect the cellular modem USB cable.
I want to disconnect
the modem and
re-use it at a different
site.
Moving the modem to a different IQ Gate-
way deactivates the modem. Contact
Enphase Customer Support if you need to
re-install the modem at a different site.
Troubleshooting
TROUBLESHOOTING
Contact Enphase Customer Support (enphase.com/en-us/support/contact) if you have any questions about troubleshooting your system.
aLED overview
LED State Description
All Flashing red in unison The IQ Gateway is booting up
Flashing green sequentially Software upgrade in progress
Network communications
Solid green Communicating with Enphase App
Flashing green WPS connection in progress, or IQ Gateway is attempting to connect to Enphase App
Solid red Local network connection only
Off No network connection
AP mode
Solid green AP mode enabled: IQ Gateway Wi-Fi network available
Off AP mode disabled: IQ Gateway Wi-Fi network unavailable
Power production
Solid green All communicating microinverters are producing
Flashing green Microinverter upgrade in progress
Solid Red At least one microinverter is not producing
Off Microinverters are not communicating (low light or night time)
Device communications
Solid Green All devices are communicating
Flashing Green Device scan in progress
Solid Red At least one device is not communicating
Off Devices are not communicating (low light or night time)

bDevice detection issues
If the Device Communications LED lights solid red, it may be a result
of low light levels. If there isn’t enough sunlight to power up the microin-
verters, they can’t communicate with the IQ Gateway.
If there is sufcient daylight for the microinverters to power up, the issue
may be that the IQ Gateway is having difculty communicating over the
power lines. To troubleshoot this issue:
• Check the Enphase Installer App mobile app to see which devices are
not communicating.
• Check that the circuit breaker(s) in the IQ Combiner 4C for the PV
array are in the “ON” position.
• Verify that the PV modules are connected to the microinverters.
• Verify the PV module DC voltage is within the allowable range for the
microinverter.
• For connection issues related to IQ Battery/IQ System Controller,
ensure that you have performed Range test to make sure that all the
devices are in the communication range.
cPower production issues
If the Power Production LED lights solid red, check the Enphase Installer
App mobile app to see which microinverters are not producing:
• If no microinverters are producing power, there may be a grid or wiring
issue. First, verify that there is proper input voltage and frequency from
the utility. Next, check the breaker and wiring, starting at the load center.
• If all of the non-productive microinverters are on the same branch,
check the breaker and wiring starting at the junction box for the affected
branch.
• If only one or scattered microinverters are not producing power, rst
check to see that the AC connectors are fully seated. Next, check that
each module is providing the required startup voltage for the microin-
verter (22V). A PV module that is failing or that is undersized may not
generate enough power for AC conversion.
dInternet connection issues
If you are using Wi-Fi and the Network Communications LED remains off
or solid red:
• The WPS connection window may have timed out. Retry the connection steps.
• Make sure that the broadband router is connected and operational by
checking that other devices at the site can access the network.
• Check for metal enclosures or obstructions that may be impeding wireless
communication.
• If you don’t see your router/access point in the list on the IQ Gateway, or
cannot maintain a connection, you may need to add a wireless repeater to
extend the network range.
If you are using the Enphase Mobile Connect modem and the Network Commu-
nications LED remains off or lights solid red, see Troubleshooting in the Enphase
Mobile Connect Installation Guide.
If you replace your router, congure the IQ Gateway Wi-Fi settings for the new
Wireless Network Name (SSID) and password, or use the WPS function de-
scribed in Installation Step 10.
eLoss of AC to a single branch of microinverters
If a single branch of microinverters is not producing, it may indicate loss of AC
to the branch.
• Use a multi-meter set to AC to test the breaker lugs. The result should be
around 240 VAC.
• If not, switch the breaker off and on to reset.
fInoperable IQ Gateway (all LEDs off)
If the IQ Gateway is not receiving power, all LEDs will be off.
• Use a multimeter set to AC to test line 1 on the IQ Gateway breaker to
the AC neutral busbar. The result should be around 120 VAC.
gInoperable IQ Gateway and no AC to branch
If a branch of microinverters is not producing and the IQ Gateway LEDs are off:
• Test at the main lugs for L-L and L-N voltages. The results should
be around 240 VAC and 120 VAC respectively. If not, there may be a
problem with the wiring from the panel.
Mounting Rail and Rivets Enphase Mobile Connect Dimensions

REGULATORY NOTICES
(Model X-IQ-AM1-240-4C only)
FCC - Antenna - Wireless Products only
The antenna intended for use with this unit meets the requirements for mobile
operating congurations and for xed mounted operations, as dened in
2.1091 and 1.1307 of the FCC rules for satisfying RF exposure compliance. If
an alternate antenna is used, consult user documentation for required antenna
specications.
FCC - 47 CFR Part 15 Regulation
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television recep-
tion, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the 47 CFR rules. Operation of this device
is subject to the following conditions: (1} This device may not cause harmful
interference, and (2} this device must accept any interference that may cause
undesired operation.
Industry Canada Class B Notice
This Class B digital apparatus meets all requirements of the Canadian Interfer-
ence-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Regle-
ment Canadien sur le matériel brouilleur.
This device complies with Industry Canada RSS Appliance radio exempt from
licensing. The operation is permitted for the following two conditions:
1. the device may not cause harmful interference, and
2. the user of the device must accept any interference suffered, even if the
interference is likely to jeopardize the operation.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux
appareils radio exempts de licence.
L’exploitation est autorisée aux deux conditions suivantes:
1. l’appareil ne doit pas produire de brouillage, et
2. l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d’en compromettre le
fonctionnement.
Industry Canada and FCC
This device complies with Industry Canada license-exempt RSS stan-
dard(s) and part 15 of the FCC rules. Operation is subject to the following
two conditions:
1. this device may not cause interference, and
2. this device must accept any interference, including interference that
may cause undesired operation of the device.
Cet appareil est conforme avec Industrie Canada RSS exemptes de licence
standard (s) et la partie 15 des règles de la FCC. Son fonctionnement est
soumis aux deux conditions suivantes:
1. l’appareil ne doit pas produire de brouillage, et
2. l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique
subi, même si le brouillage est susceptible d’en compromettre le
fonctionnement.
EMC, Safety, and R&TTE Directive Compliance
The CE mark is afxed to this product to conrm compliance with the
following European Community Directives:
Council Directive 2004/108/EC of 15 December 2004 on the approximation
of the laws of Member States relating to electromagnetic compatibility;
and
Council Directive 2006/95/EC of 12 December 2006 on the harmonization
of the laws of Member States relating to electrical equipment designed for
use within certain voltage limits;
and
Council Directive 2011/65/EU on the restriction of the use of certain haz-
ardous substances in electrical and electronic equipment;
and
Council Directive 1999/5/EC of 9 March 1999 on radio equipment and
telecommunications terminal equipment and the mutual recognition of
their conformity.
Warning! Changes or modications to this unit not expressly
approved by the party responsible for compliance could void
the user’s authority to operate the equipment.

Enphase Customer Support: enphase.com/en-us/support/contact
Safety and Advisory Symbols
+DANGER: This indicates a hazardous situation, which if not avoided, will
result in death or serious injury.
*WARNING: This indicates a situation where failure to follow instructions
may be a safety hazard or cause equipment malfunction. Use extreme
caution and follow instructions carefully.
✓NOTE: This indicates information particularly important for optimal
system operation. Follow instructions carefully.
Safety Instructions
+DANGER: Risk of electric shock. Risk of re. Do not attempt to repair the
IQ Gateway; it contains no user-serviceable parts. Tampering with the IQ
Gateway will void the warranty. If the IQ Gateway fails, contact Enphase
Customer Support for assistance (enphase.com/en-us/support/contact).
+DANGER: Risk of electrocution! Do not install CTs when current owing
in the sensed circuit. Always install CT wires in the terminal blocks before
energizing the sensed circuit.
+DANGER: Risk of electric shock. Do not use Enphase equipment in a
manner not specied by the manufacturer. Doing so may cause death or
injury to persons, or damage to equipment.
+DANGER: Risk of electric shock. Be aware that installation of this equip-
ment includes risk of electric shock. Do not install the IQ Combiner 4/4C
without rst removing AC power from the Enphase System. Ensure the
power coming from the microinverters is de-energized before servicing
or installing.
+DANGER: Risk of electric shock. Risk of re. Only qualied personnel
should troubleshoot, install, or replace the IQ Combiner 4C or IQ Com-
biner 4.
+DANGER: Risk of electric shock. Improper servicing of the IQ Combiner
4C or IQ Combiner 4 or its components may result in a risk of shock, re
or explosion. To reduce these risks, disconnect all wiring before attempt-
ing any maintenance or cleaning.
+DANGER: Risk of electric shock. Always de-energize the AC branch circuit
before servicing. While connectors are rated for disconnect under load, it
is a best practice to de-energize before disconnecting.
+DANGER: Risk of electric shock. Risk of re. Only use electrical system
components approved for wet locations.
+DANGER: Risk of electric shock. Risk of re. Ensure that all wiring is
correct and that none of the wires are pinched or damaged.
+DANGER: Risk of electric shock. Risk of re. Do not work alone. Someone
should be in the range of your voice or close enough to come to your aid
when you work with or near electrical equipment. Remove rings, brace-
lets, necklaces, watches etc. when working with batteries, photovoltaic
modules or other electrical equipment.
+DANGER: Risk of electric shock. Risk of re. Before making any connec-
tions verify that the circuit breaker(s) are in the off position. Double check
all wiring before applying power.
+DANGER: Risk of electric shock. Risk of re. Do not wire unused termi-
nals or terminal blocks on the IQ Gateway.
+WARNING: Risk of electric shock. To maintain the warranty,
do not modify the dead-front other than to remove ller plates, as
needed.
*WARNING: Before installing or using the IQ Combiner 4C or IQ Combiner
4, read all instructions and cautionary markings in the technical descrip-
tion and on the equipment.
*WARNING: Use the circuit breakers in the Enphase IQ Combiner 4C or
IQ Combiner 4 only for serving Enphase equipment. No other loads are
allowed.
FCC Statement: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in a
residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interfer-
ence to radio communications. However, there is no guarantee that interference will
not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, you are encouraged
to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Changes or modications not expressly approved by the party responsible for com-
pliance may void the user’s authority to operate the equipment.
This Class B digital apparatus complies with Industry Canada ICES-003.
*WARNING: This unit is not provided with a GFDI device. This inverter or
charge controller must be used with an external GFDI device as required by
the Article 690 of the National Electrical Code for the installation location.
*WARNING: The IQ Combiner 4C and IQ Combiner 4 have a pre-installed
heat shield attached to the enclosure door. Do not remove the heat
shield.
*WARNING: This product is intended for operation in an environment
having a maximum ambient temperature of 46ºC (115ºF).
*WARNING: BONDING BETWEEN CONDUIT CONNECTIONS IS NOT AUTO-
MATIC AND MUST BE PROVIDED AS PART OF THE INSTALLATION.
✓NOTE: Perform all wiring in accordance with all applicable local electrical
codes, with the Canadian Electrical Code, Part I, and with the National
Electrical Code (NEC), ANSI/NFPA 70.
✓NOTE: Protection against lightning and resulting voltage surge must be in
accordance with local standards.
✓NOTE: Using unapproved attachments or accessories could result in
damage or injury.
✓NOTE: Install the IQ Combiner 4C or IQ Combiner 4 in the eld with 75°C
or higher copper conductors sized per local code requirements and
voltage drop/rise considerations.
✓NOTE: Use Class 1 wiring methods for eld wiring connections to terminals
of a Class 2 circuit. Use 14 to 6 AWG wire for branch circuits and 14 to 3
AWG for output circuits. Select the wire gauge used based on the protection
provided by the circuit breaker(s)/fuses. Overcurrent protection must be
installed as part of the system installation.
✓NOTE: To ensure optimal reliability and to meet warranty requirements,
the Enphase IQ Combiner 4C and/or IQ Combiner 4 must be installed
according to the instructions in this guide.
SAFETY (all models)
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Follow these important instructions during installation and maintenance of
the IQ Combiner 4/4C.
© 2021 Enphase Energy. All rights reserved. Enphase, the Enphase logo, IQ System
Controller, IQ Battery, IQ Gateway, IQ Combiner, IQ Microinverter, Enphase Installer
App, and other trademarks or service names are the trademarks of Enphase Energy,
Inc. Data subject to change. 10-22-2021