enphase IQ 7+ User manual

INSTALLATION AND OPERATION MANUAL
© 2023 Enphase Energy Inc. All rights reserved. August 2023
USM-00002-1.0
Region: India
Enphase IQ7+ and IQ7A Microinverters

IQ7+ and I Q7A Installation and Operation Manual – India
2 © 2023 Enphase Energy Inc. All rights reserved. August 2023
USM-00002-1.0
Contents
Corporate headquarters contact information .................................................................................................. 4
Other information .................................................................................................................................................... 4
Audience .................................................................................................................................................................... 4
Important safety information ................................................................................................................................ 5
Read this first......................................................................................................................................................... 5
Product labels....................................................................................................................................................... 5
Safety and advisory symbols............................................................................................................................. 5
IQ7 Series Microinverter safety instruction ................................................................................................... 5
The Enphase Energy System.................................................................................................................................. 9
How does the Enphase IQ Series Microinverter work?................................................................................ 9
System monitoring......................................................................................................................................... 10
Optimal reliability........................................................................................................................................... 10
Ease of design ................................................................................................................................................. 10
Planning for microinverter installation ............................................................................................................. 10
Compatibility.........................................................................................................................................................11
Earthingconsiderations......................................................................................................................................11
Branch circuit capacity.......................................................................................................................................11
Utility service requirements..............................................................................................................................12
Wire lengths and voltage rise ...........................................................................................................................12
Lightning and surge suppression.....................................................................................................................12
Parts and tools required ....................................................................................................................................12
Enphase equipment........................................................................................................................................12
Other tools........................................................................................................................................................13
Enphase microinverter installation......................................................................................................................13
Step 1: Position the IQ Cable.............................................................................................................................14
Step 2: Position the junction box .....................................................................................................................14
Step 3: Mount the microinverters ....................................................................................................................14
Step 4: Create an installation map...................................................................................................................15
Step 5: Manage the cabling...............................................................................................................................16
Step 6: Connect the microinverters................................................................................................................16

IQ7+ and I Q7A Installation and Operation Manual – India
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Step 7: Terminate the unused end of the cable.............................................................................................17
Step 8: Complete the installation of the junction box.................................................................................17
Step 9: Connect the PV module.......................................................................................................................18
Step 10: Energize the system.............................................................................................................................18
Step 11: Set up and activate monitoring..........................................................................................................19
Troubleshooting ......................................................................................................................................................19
Status LED indications and error reporting...................................................................................................19
LED operation ..................................................................................................................................................19
DC Resistance Low – Power Off condition...............................................................................................20
Other faults......................................................................................................................................................20
Troubleshoot an inoperable microinverter...................................................................................................20
Disconnect a microinverter ..............................................................................................................................21
Install a replacement microinverter ...............................................................................................................22
Ordering replacement parts ............................................................................................................................23
IQ Cable planning and ordering......................................................................................................................24
Connector spacing options .........................................................................................................................24
Cabling options ..............................................................................................................................................24
IQ Cable accessories.....................................................................................................................................24
Technical data.........................................................................................................................................................25
Technical considerations..................................................................................................................................25
Compliance data ................................................................................................................................................25
Anti-islanding function.................................................................................................................................25
PQ capability curve .......................................................................................................................................25
Specifications .....................................................................................................................................................26
IQ7PLUS-72-2-INT Microinverter specifications....................................................................................26
IQ7A-72-2-INT Microinverter specifications ............................................................................................28
IQ Cable specifications................................................................................................................................ 30
Enphase installation map..................................................................................................................................32
Sample single-phase wiring diagram.............................................................................................................33
Sample multi-phase wiring diagram ..............................................................................................................34
Revision history ......................................................................................................................................................35

IQ7+ and I Q7A Installation and Operation Manual – India
4 © 2023 Enphase Energy Inc. All rights reserved. August 2023
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Corporate headquarters contact information
Enphase Energy Inc.
https://enphase.com/contact/support
Other information
Product information is subject to change without notice. All trademarks are recognized as the property of their
respective owners.
User documentation is updated frequently; Check the Enphase website documentation link for the latest
information.
To ensure optimal reliability and to meet warranty requirements, the Enphase microinverter must be installed
according to the instructions in this manual. For warranty text, refer to enphase.com/warranty.
For Enphase patent information, refer to enphase.com/en-in/patents/
© 2023 Enphase Energy Inc. All rights reserved.
Audience
This manual is intended for use by professional installation and maintenance personnel.

IQ7+ and I Q7A Installation and Operation Manual – India
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Important safety information
Read this first
This manual contains important instructions for use during the installation and maintenance of the IQ7 Series
Microinverters.
IMPORTANT: Enphase IQ Series Microinverters require the IQ Cable and are not compatible with previous
Enphase cabling. An IQ Gateway Metered is required to monitor the performance of the IQ Microinverters. The
IQ accessories work only with Enphase IQ Series Microinverters.
Product labels
The following symbols appear on the product label and are described here:
WARNING: Hot surface
DANGER: Refer to safety instructions
DANGER: Risk of electrical shock
Refer to the manual
Double insulated
Safety and advisory symbols
To reduce the risk of electric shock and to ensure the safe installation and operation of the Enphase IQ System,
the following safety symbols appear throughout this document to indicate dangerous conditions and
important safety instructions.
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.
WARNING:
This
indicates a situation where failure to follow instructions may result in a burn
injury.
NOTE:
This
indicates information that is very important for optimal system operation. Follow
the instructions closely.
IQ7 Series Microinverter safety instruction
General
safety
DANGER: Risk of
electric shock. Risk
of fire.
Only
use electrical system components approved for wet locations.
Only qualified personnel should install, troubleshoot, or replace
Enphase
microinverters or Enphase IQ Cable and accessories.
Ensure that all AC and DC wiring is correct and that none of the AC or DC wires
are pinch
ed, shorted, or damaged. Ensure that all AC junction boxes are properly
closed.

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Do not exceed the maximum number of microinverters in an AC branch circuit as
listed in the
manual. You must protect each microinverter AC branch circuit with a
20 A maximum breaker or fuse as appropriate.
DANGER: Risk of
electric shock.
Do
not use Enphase equipment in a manner not specified by the manufacturer.
Doing so may cause death or injury to persons or damage to equipment.
Be aware that the installation of this equipment includes the risk of electric shock.
The
DC conductors of this photovoltaic system are ungrounded and may be
energized.
Always de
-energize the AC branch circuit before servicing. While connectors are
rated for
disconnect under load, Enphase does not recommend disconnecting the
DC connectors under load.
WARNINGS:
Before installing or using the
Enphase microinverter, read all instructions and
cautionary
markings in the technical description of the Enphase equipment and
the photovoltaic (PV) equipment.
Do not connect
Enphase microinverters to the grid or energize the AC circuit(s)
until you have
completed all the installation procedures and received approval
from the electrical utility.
When
the PV array is exposed to light, DC voltage is supplied to the power
conversion equipment (PCE).
Risk of equipment damage. Enphase male and female connectors must only be
mated with the matching male/female connector.
NOTES:
To
ensure optimal reliability and to meet warranty requirements, install the Enphase
equipment according to the instructions in this manual.
The
AC and DC connectors on the cabling are rated as disconnects only when
used with an Enphase microinverter.
Protection
against lightning and the resulting voltage surge must be in accordance
with local standards.
Perform
all electrical installations in accordance with all applicable local electrical
codes.
Microinverter
safety
WARNING: Risk of
skin burn.
The chassis of the
Enphase microinverter is the heat sink. Under normal operating
conditions,
the temperature could be 20°C above ambient, but under extreme
conditions
, the microinverter can reach a temperature of 90°C. To reduce the risk
of burns, use caution when working with microinverters.
DANGER: Risk of
fire.
The
DC conductors of the PV module must be labelled “PV Wire” or “PV Cable”
when paired with the Enphase microinverter.
DANGER: Risk of
electric shock. Risk
of fire.
Only qualified personnel may connect the Enphase microinverter to the utility grid.
Do not attempt to repair the
Enphase microinverter; it contains no user-
serviceable parts. If it fails,
contact Enphase Support to obtain a return
merchandise authorization (RMA) number
and start the replacement process.
Tampering with or opening the Enphase microinverter will void the warranty.
WARNING: Risk of
equipment damage
Install the microinverter under the PV
module to avoid direct exposure to rain, UV,
and other
harmful weather events. Always install the microinverter bracket side up.
Do not mount the microinverter upside down. Do not expose the AC or DC

IQ7+ and I Q7A Installation and Operation Manual – India
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connectors (on the IQ Cable, PV module, or microinverter) to rain or condensation
before the connectors
are mated.
The
maximum open circuit voltage of the PV module must not exceed the specified
maximum
input DC voltage of the Enphase microinverter. Refer to the Enphase
compatibility calculator.
WARNING: Risk of
equipment damage
You must match the DC operating voltage range of the PV module with the
allowable input voltage range of the Enphase microinverter.
The
Enphase microinverter is not protected from damage due to moisture trapped
in cabling
systems. Never mate microinverters to cables that have been left
disconnected and exposed to wet conditions. This voids the Enphase warranty.
The
Enphase microinverter functions only with a standard, compatible PV module
with appropriate fill
factor, voltage, and current ratings. Unsupported devices
include smart PV modules, fuel cells, wind or water turbines, DC generators, non
-
Enphase batteries,
and other devices. These devices do not behave like standard
PV modules, so operation and complian
ce are not guaranteed. These devices may
also damage the
Enphase microinverter by exceeding its electrical rating, making
the system potentially unsafe.
NOTES:
The
Enphase microinverter has field-adjustable voltage and frequency trip points
that
may need to be set, depending on local requirements. Only an authorized
installer with permission and
the following requirements of the local electrical
authorities should make adjustments.
IQ Cable
safety
DANGER: Risk of
electric shock
.
Do not install the IQ Cable terminator while the power is connected.
WARNING: Risk of
electric shock. Risk
of fire.
When stripping the sheath from the
IQ Cable, make sure the conductors are not
damaged. If
the exposed wires are damaged, the system may not function
properly.
Do
not leave the AC connectors on the IQ Cable uncovered for an extended
period. You must cover any unused connector with a sealing cap.
Make
sure protective sealing caps have been installed on all unused AC
connectors.
Unused AC connectors are live when the system is energized.
WARNING:
Use the terminator only once. If you open the terminator following installation, the
latching mechanism is destroyed. If the latching mechanism is defective, do not
use the terminator. Do not circumvent or manipulate the latching mechanism.
When
installing the IQ Cable, secure any loose cables to minimize tripping hazards.
NOTES:
When
looping the IQ Cable, do not form loops smaller than 12 cm (4.75″) in
diameter.
Provide support for the IQ Cable every 1.8 m (6 feet).
If
you need to remove a sealing cap, you must use the IQ Disconnect Tool.

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When
installing the IQ Cable and accessories, adhere to the following:
•Do not expose the terminator cap or cable connections to directed,
pressurized liquid (water jets, and so on).
•Do not expose the terminator or cable to continuous immersion.
•Do not expose the terminator cap or cable connections to continuous
tension (for example, tension due to pulling or bending the cable near the
connection).
•Use only the connectors provided.
•Do not allow contamination or debris in the connectors.
•Use the terminator cap and cable connections only when all parts are
present and intact.
•Do not install or use in potentially explosive environments.
•Do not allow the terminator to come into contact with an open flame.
•Fit the terminator cap using only the prescribed tools and in the
prescribed manner.
•Use the terminator to seal the conductor end of the IQ Cable; no other
method is allowed.

IQ7+ and I Q7A Installation and Operation Manual – India
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The Enphase Energy System
The Enphase Energy System includes:
•Enphase IQ7+ and IQ7A Microinverters. The smart grid-ready IQ Series Microinverters convert the DC
output of the PV module into single-phase AC power.
•Enphase IQ Gateway Metered. Use the model ENV-S-WM-230. The Enphase IQ Gateway Metered is a
communication device that provides network access to the PV array. The IQ Gateway Metered collects
production and performance data from the Enphase IQ Microinverters over onsite AC power lines and
transmits the data to the Enphase App through an internet connection. The IQ Gateway Metered can
monitor up to 300 Enphase IQ Microinverters. For details, refer to the Enphase IQ Gateway Metered
Installation and Operations Manual.
•Enphase Installer Platform is a web-based monitoring and management software. Installers can use
the Enphase Installer Portal to view detailed performance data, manage multiple PV systems, and
remotely resolve issues that might impact system performance. Find out more at
https://enphase.com/en-in/installers/apps.
•Enphase Installer App for iOS and Android devices. It allows installers to configure the system while
onsite, eliminating the need for a laptop and improving installation efficiency. You can use the app to:
oConnect to the IQ Gateway Metered over a wireless network or
Ethernet for faster system setup and verification.
oScan device serial numbers and sync system information with
Enphase App monitoring software.
oView and email a summary report that confirms a successful installation.
NOTE: To ensure optimal reliability and to meet warranty requirements, the Enphase microinverter
must be installed according to the instructions in this manual.
How does the Enphase IQ Series Microinverter work?
The Enphase microinverter maximizes energy production by using a sophisticated maximum power point
tracking (MPPT) algorithm. Each Enphase microinverter individually connects to one PV module in your array.
This configuration enables an individual MPPT to control each PV module, ensuring that the maximum power
available from each PV module is exported to the utility grid regardless of the performance of the other PV
modules in the array. While an individual PV module in the array may be affected by shading, soiling, orientation,
or PV module mismatch, each Enphase microinverter ensures top performance for its associated PV module.

IQ7+ and I Q7A Installation and Operation Manual - India
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System monitoring
Once you install the IQ Gateway Metered and provide an internet connection through a broadband router or
modem, the Enphase IQ Microinverters automatically begin reporting to the Enphase App. The Enphase App
presents current and historical system performance trends and informs you of PV system status.
Optimal reliability
Microinverter systems are inherently more reliable than traditional inverters. The distributed nature of a
microinverter system ensures that there is no single point of system failure in the PV system.
Enphase microinverters are designed to operate at full power at ambient temperatures as high as between
-20°C−65°C (-4°F−150°F).
Ease of design
PV systems using Enphase microinverters are very simple to design and install. You will not need string
calculations or cumbersome traditional inverters. You can install individual PV modules in any combination of
PV module quantity, type, age, and orientation. Each microinverter quickly mounts on the PV racking directly
beneath each PV module. Low-voltage DC wires connect from the PV module directly to the co-located
microinverter, eliminating the risk of personnel exposure to dangerously high DC voltage.
Planning for microinverter installation
The IQ7+ and IQ7A Microinverters support PV modules with 60-cells/120-half-cells or 72-cells/144-half-cells
or 66-cell/132-cells.
All install quickly and easily. The microinverter housing is designed for outdoor installation and complies with
the IP67 environmental enclosure rating standard.
NOTE: IP67 rating definition: Indoor or outdoor use primarily to provide a degree of protection against
hose-directed water, the entry of water during occasional temporary submersion at a limited depth,
and damage from external ice formation.
The IQ Cable is available in multiple connector spacing options for landscape and portrait orientations to
meet varying site requirements. For IQ Cable ordering information, see IQ Cable planning and ordering in this
manual.

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Compatibility
The Enphase IQ Series Microinverters are electrically compatible with PV modules, as listed in the following
table. For specifications, see the Technical specifications in this manual. You can refer to Enphase
compatibility calculator to verify PV module electrical compatibility. To ensure mechanical compatibility, be
sure to order the correct connector type for both the microinverter and PV module from your distributor.
WARNING: Risk of fire. The PV module DC conductors must be labelled "PV Wire" or "PV Cable” to
comply with the NEC for ungrounded PV power systems.
Microinverter model Connector type PV module cell count
IQ7PLUS-72-2-INT, I Q7A-72-2-INT MC-4 locking type
60 cell/120 half-cell
66-cell/132 half-cell
72 cell/144 half-cell
NOTE: IQ Series Microinverters will not begin exporting power until the IQ Gateway is installed and
has detected all the microinverters at the site. In addition, the grid profile may need to be
configured, and the IQ Gateway must have propagated these settings to the microinverters. For
instructions on this procedure, refer to the IQ Gateway Installation and Operation Manual at the
documentation centre.
Earthing considerations
The microinverter has a Class II double-insulated rating, which includes ground fault protection (GFP). Refer
to local electrical codes and standards for earthing requirements of PV array and racking.
Branch circuit capacity
Plan your AC branch circuits to meet the following limits* for the maximum number of microinverters per
branch when protected with a 20 A MCB/fuse over the current protection device. For most three-phase
installations, use a 4-pole 20 A MCB/fuse.
Maximum* IQ Microinverters per AC branch circuit
Microinverter model IQ7PLUS I Q7A
Single-phase
12
10
Three-phase
36 (12 per phase branch circuit)
30 (10 per phase branch circuit)
*Limits may vary. Refer to local requirements to define the number of microinverters per branch in your area.

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Utility service requirements
The Enphase microinverters work with single-phase or three-phase service. Measure the AC line voltage at
the electrical utility connection to confirm that it is within range:
Single-phase service
Three-phase service
L1 to N 184 to 276 VAC L1, L2, L3 to N 184 to 276 VAC*
NOTE: *Nominal voltage range can be extended beyond nominal if required by theutility.
Wire lengths and voltage rise
When planning the system, you must select the appropriate AC conductor size to minimize voltage rise.
Select the correct conductor size based on the distance from the junction with the microinverter AC branch
circuit to the circuit breaker in the electrical panel. Enphase recommends a voltage rise total of less than 2%
for the sections from the microinverter AC branch circuit to the circuit breaker in the electrical panel.
Best practice: Center-feed the branch circuit to minimize voltage rise in a fully populated branch.
This practice greatly reduces the voltage rise as compared with an end-fed branch. To center-
feed a branch, divide the circuit into two sub-branch circuits protected by a single MCB or fuse,
or isolator.
Lightning and surge suppression
Enphase microinverters have integral surge protection, which is greater than that of most traditional
inverters. However, if the surge has sufficient energy, the protection built into the microinverter can be
exceeded, and the equipment can be damaged. For this reason, Enphase recommends that you protect your
system with a lightning and/or surge suppression device. In addition to having some level of surge
suppression, it is also important to have insurance that protects against lightning and electrical surges.
NOTE: Protection against lightning and the resulting voltage surge must be in accordance with
local standards.
Parts and tools required
In addition to the microinverters, PV modules, and racking, you will need the following:
Enphase equipment
•Enphase IQ Gateway Metered is required to monitor solar production. For installation information,
refer to the Enphase IQ Gateway Metered Installation and Operations Manual.
•IQ Relay Q-RELAY-3P-INT for single-phase and three-phase installations.
oIn Enphase IQ installations, the IQ Relay acts as a grid monitoring and disconnection device
and includes a built-in phase coupler to distribute power line communication signals across
phases. An external phase coupler is not needed for a three-phase system when the IQ Relay
is installed.
oThe IQ Relay physically isolates the IQ Series Microinverters from the grid when IQ Relay
senses voltage or frequency abnormalities, loss of mains from the grid, or as required by grid

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regulations, improving the system reliability. IQ Relay automatically reconnects when valid
grid conditions resume and must be installed on all sites to improve the system reliability.
oAll Enphase systems (single-phase and three-phase) shall need to mandatorily install IQ Relay
to benefit from our limited microinverter warranty. (Effective for systems activated on or after
September 01, 2022) You can find the Enphase Limited Warranty for India at
https://enphase.com/warranty/india
•Tie wraps.
•IQ Sealing Caps (Q-SEAL-10) for any unused drops on the IQ Cable (optional).
•IQ Terminator (Q-TERM-10). One for each AC cable segment end; typically, two IQ Terminators
(center feeding branch circuit) are required per branch circuit.
•IQ Disconnect Tool (Q-DISC-10).
•IQ Cable.
•Enphase Installer App.
Download the Enphase Installer App and open it to log in to your Enphase Account. With this mobile
app, you can scan microinverter serial numbers and connect to the IQ Gateway Metered to track
system installation progress. To download, go to enphase.com/toolkit or scan the QR code at right.
Cable model Connector spacing PV module orientation Connector count per
box
Q-12-10-240
1.3 m Portrait 240
Q-12-20-200
2.3 m
Landscape (72-cell)
200
Other tools
The other tools are:
•Screwdrivers (#1 and #3)
•Wire cutters, voltmeter
•Torque wrench, sockets, and wrenches for mounting hardware
Enphase microinverter installation
Installing the Enphase IQ Series Microinverters involves several key steps. Each step listed here is detailed on
the following pages:
Step 1: Position the IQ Cable
Step 2: Position the junction box
Step 3: Mount the microinverters
Step 4: Create an installation map
Step 5: Manage the cabling
Step 6: Connect the microinverters
Step 7: Terminate the unused end of the cable
Step 8: Complete the installation of the junction box
Step 9: Connect the PV modules
Step 10: Energize the system

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Step 11: Set up and activate monitoring
Step 1: Position the IQ Cable
A. Plan each cable segment to allow drop connectors on the IQ Cable to align with each PV module.
Allow extra length for slack, cable turns, and any obstructions.
B. Mark the approximate centers of each PV module on the PV racking.
C. Lay out the cabling along the installed rack for the AC branch circuit.
D. Cut each segment of cable to meet your planned needs.
WARNING: When transitioning between rows, secure the cable to the rail to prevent cable or
connector damage. Do not count on the connector to withstand tension.
Step 2: Position the junction box
A. Verify that the AC voltage at the site is within range.
Single-phase system
Three-phase system
L1 to N
184 to 276 VAC
L1, L2, L3 to N
184 to 276 VAC*
B. Install a junction box at a suitable location on the racking.
C. Provide an AC connection from the junction box back to the electricity network using equipment
and practices as required by local jurisdictions.
Step 3: Mount the microinverters
A. If the Enphase DC bulkhead connectors are not already attached to the microinverters, attach them
now. Make sure they are fully seated.
B. Mount the microinverter bracket side up (as shown) and under the PV module, away from rain and
sun. Allow a minimum of 1.9 cm between the roof and the microinverter. Also, allow 1.3 cm between
the back of the PV module and the top of the microinverter.

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WARNING: Install the microinverter under the PV module to avoid direct exposure to rain, UV, and
other harmful weather events. Do not mount the microinverter upside down.
C. Torque the microinverter fasteners as follows. Do not over-torque.
•6 mm mounting hardware: 5 N m
•8 mm mounting hardware: 9 N m
Step 4: Create an installation map
The Enphase installation map is a diagram of the physical location of each microinverter in your PV
installation. Copy or use the blank installation map in this manual to record microinverter placement for the
system, or provide your own layout if you require a larger or more intricate installation map.
Each Enphase microinverter, IQ Gateway, and IQ Relay has a removable serial number label. Build the
installation map by peeling the serial number labels from the microinverter mounting plates and placing the
labels on the map. You will also place the Enphase IQ Gateway Metered and serial numbers on the map after
installation.
After creating the installation map, use the Enphase Installer App to record serial numbers and configure the
system.
For details, refer to “Detect the Microinverters” in the help topics of the Enphase Installer App.
A. Peel the removable serial number label from each microinverter and affix it to the respective location
on the paper installation map.
B. Peel the label from the IQ Gateway Metered, if installed, and affix it to the installation map.
C. Always keep a copy of the installation map for your records.
D. Peel the label from the IQ Relay, if installed, and affix it to the installation map.

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Step 5: Manage the cabling
A. Use cable clips or tie wraps to attach the cable to the racking. Make sure there is 1.8 m or less
between cable clips or tie wraps.
B. Dress any excess cabling in loops to avoid contacting the roof. Do not form loops smaller than 12 cm
in diameter.
WARNING: Tripping Hazard. Loose cables can become a tripping hazard. Dress the IQ Cable to
minimize this potential.
Step 6: Connect the microinverters
A. Connect the microinverter. Listen for a click as the connectors engage.
B. Cover any unused connectors with IQ Sealing Caps. Listen for a click as the connectors engage.
WARNING: Risk of electric shock. Risk of fire. Install sealing caps on all unused AC connectors, as
these connectors become live when the system is energized. Sealing caps are required for
protection against moisture ingress.
NOTE: If you need to remove a sealing cap, you must use the IQ Disconnect Tool. See Disconnect
a microinverter in this manual.

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Step 7: Terminate the unused end of the cable
Terminate the unused end of the IQ Cable as follows:
Single-phase IQ Cable
Si. No Description Diagram
1. Remove 13 mm of the cable sheath from the
conductors. Use the terminator body loop to
measure.
2. Slide the hex nut onto the cable.
3. Insert the cable into the terminator body so that
the two wires land on opposite sides of the internal
separator. The grommet inside the terminator body
must remain in place.
4. Insert a screwdriver into the slot on the top of the
terminator to hold it in place. Hold the terminator
body stationary with the screwdriver and turn only
the hex nut to prevent the conductors from
twisting out of the separator.
Torque the nut to 7.0 N m.
5. Attach the terminated cable end to the PV racking
with a cable clip or tie wrap so that the cable and
terminator do not touch the ro of.
NOTE: For India, the color of the live wire is red, and the neutral is black.
NOTE: Turn only the hex nut to prevent conductors from twisting out of the separator.
WARNING: The terminator cannot be re-used. If you unscrew the nut, you must discard the
terminator.
Step 8: Complete the installation of the junction box
A. Connect the IQ Cable to the junction box.
B. For more information, refer to the wiring diagrams in this manual. IQ Cable uses the following color
code:

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IQ Cable
Color code
Single-phase Red – L1
Black – N
NOTE: Minimise the number of unused IQ Cable connectors with three-phase systems. When cable
connectors are left unused on a three-phase system, it creates a phase imbalance on the branch
circuit. If multiple cable connectors are skipped over multiple branch circuits, the imbalance can
multiply.
Step 9: Connect the PV module
WARNING: Electrical shock hazards. The DC conductors of this photovoltaic system are
ungrounded and may be energized.
A. Connect the DC leads of each PV module to the DC input connectors of the corresponding
microinverter.
B. Check the LED on the connector side of the microinverter. The LED flashes six times when DC power
is applied.
C. Mount the PV modules above the microinverters.
Step 10: Energize the system
A. Turn ON the AC fuse or circuit breaker for the branch circuit.
B. Turn ON the main utility-grid AC circuit breaker. Your system starts producing power after a five-
minute wait time.
C. Check the LED on the connector side of the microinverter.

IQ7+ and I Q7A Installation and Operation Manual - India
19 © 2023 Enphase Energy Inc. All rights reserved. August 2023
USM-00002-1.0
Step 11: Set up and activate monitoring
Refer to the Enphase IQ Gateway Metered Quick Install Guide to install the IQ Gateway Metered and set up
system monitoringand grid management functions. This guide leads you through the following:
•Connecting the IQ Gateway
•Detect devices
•Connecting to the Enphase App
•Registering the system
•Building the virtual array
NOTE: When the utility requires a profile other than the profile resident on the microinverter, you
must select an appropriate grid profile for your installation. You can set the grid profile through the
Enphase App, during system registration, or through the Enphase Installer App at any time. You must
have an Enphase IQ Gateway to set or change the grid profile. For more information on setting or
changing the grid profile, refer to the Enphase IQ Gateway Metered Installation and Operation
Manual at enphase.com/support.
Troubleshooting
Follow all the safety measures described throughout this manual. Qualified personnel can use the following
troubleshooting steps if the PV system does not operate correctly.
WARNING: Risk of electric shock. Do not attempt to repair the Enphase microinverter; it contains no
user-serviceable parts. If it fails, contact Enphase customer service to obtain a return merchandise
authorization (RMA) number and start the replacement process.
Status LED indications and error reporting
The following section describes LED indications.
LED operation
LED color
Indicates
Flashing green Normal operation. The AC grid function is normal; there is communication with
the IQ Gateway Metered.
Flashing orange The AC grid is normal, but there is no communication with the IQ Gateway
Metered.
Flashing red
The AC grid is either not present or not within specification.
Solid red There is an active “DC Resistance Low - Power Off” condition. To reset, see the
DC Resistance Low – Power Off condition.
The status LED on each microinverter lights green about six seconds after DC power is applied. It remains lit
solid for two minutes, followed by six green blinks. After that, red blinks indicate that no grid is present if the
system is not yet energized.
Any short red blinks after DC power is first applied to the microinverter indicate a failure during microinverter
startup.

IQ7+ and I Q7A Installation and Operation Manual - India
20 © 2023 Enphase Energy Inc. All rights reserved. August 2023
USM-00002-1.0
DC Resistance Low – Power Off condition
For all IQ7 Microinverters, a solid red status LED when DC power has been cycled indicates the microinverter
has detected a DC Resistance Low – Power Off event. The LED will remain red, and the fault will continue to
be reported by the gateway until the error has been cleared.
An insulation resistance (IR) sensor in the microinverter measures the resistance between the positive and
negative PV inputs to the ground. If either resistance drops below a threshold of 7kΩ, the microinverter stops
power production and raises this condition. This may indicate defective module insulation, defective wiring
or connectors, moisture ingress, or a similar problem. Although the cause may be temporary, this
microinverter condition persists until the sensor is manually reset.
An IQ Gateway is required to clear this condition. The condition clears on operator command unless its
cause is still present.
If a microinverter registers a DC Resistance Low - Power Off condition, you can attempt to clear this
condition. If the condition does not clear after you perform the following procedure, contact Enphase
Energy Support at https://enphase.com/contact/support.
Follow the steps below to send a clear message to the microinverter. Note that the condition will not clear
after the sensor reset if the cause of the failure is still present. If the condition persists, contact your installer.
Method: Clear this error using Enphase Installer Platform
1. Log in to Enphase Installer Platform and access the system.
2. Click the Events tab. The next screen shows a current DC Resistance Low - Power Off condition
for the system.
3. Click DC Resistance Low - Power Off.
4. Click the serial number of the affected microinverter.
5. Click Tasks and click Clear GFI to clear the event.
Other faults
All other faults are reported to the IQ Gateway. Refer to the Enphase IQ Gateway Metered Installation and
Operation Manual at enphase.com/support for troubleshooting procedures.
Troubleshoot an inoperable microinverter
To troubleshoot an inoperable microinverter, follow the steps in the order shown.
WARNING: Risk of electric shock. Always de-energize the AC branch circuit before servicing. Never
disconnect the DC connectors under load.
WARNING: The Enphase microinverters are powered by DC power from the PV modules. Make sure
you disconnect the DC connections and reconnect the DC power, and then watch for the solid green
light about six seconds after the connection to DC power.
A. Make sure the AC breakers and disconnects are closed.
B. Check the connection to the utility grid and verify that the utility voltage is within allowable ranges.
C. Verify that the AC line voltages at all solar power circuit breakers at the load center and subpanels
are within the ranges shown in the following table.