enphase IQ Combiner 3 User manual

IQ System Controller 3/3G Quick Install Guide 1
IQ System Controller 3/3G
Quick Install Guide
PRELIMINARY
MODEL NUMBERS-
SC200D111C240US01
SC200G111C240US01
VERSION 4.0
APRIL 2023

2 IQ System Controller 3/3G Quick Install Guide
The third generation of the IQ System Controller features the
following variants: the IQ System Controller 3 (SC200D111C240US01)
and the IQ System Controller 3G (SC200G111C240US01).
IQ System Controller 3 and IQ System Controller 3G are not
interchangeable in the eld.
The IQ System Controller 3G supports one PV and one IQ Battery 5P
port. A third distributed energy resource (DER) port is dedicated to
generator integration which is interlocked via hardware with the MID.
IQ System Controller 3 supports additional IQ Battery 5P on the third
DER port.
To install the IQ System Controller and wall-mount bracket, read and
follow all warnings and instructions in this guide and documents at
enphase.com/support.
To access the latest technical brief and user guides for generator
integration, see the Generator Support page at https://enphase.
com/installers/storage/generator.
Safety warnings are listed at the end of this guide. These instructions
are not meant to be a complete explanation of how to design and
install an energy storage system. All installations must comply with
national and local electrical codes and standards. Only qualied
electricians shall install, troubleshoot, or replace the IQ System
Controller 3/3G.

IQ System Controller 3/3G Quick Install Guide 3
Table of contents
Scenario 1
Full Energy Independence conguration
Whole Home backup with IQ System Controller 3
Scenario 1a
Full Energy Independence conguration
Whole Home backup with IQ System Controller 3G
Scenario 2
Home Essentials Backup conguration
Partial Home backup with IQ System Controller 3
Scenario 2a
Home Essentials Backup conguration
Partial Home backup with IQ System Controller 3G
Scenario 3
Sunlight Backup
Scenario 3a
Sunlight Backup with generator
What’s in the box
Tools/additional items required
Section A
Mounting the product
Plan a location for the IQ System Controller
Step 1: Minimum clearance
Step 2: Install the mounting bracket
Step 3: Open the dead front
Section B
Mounting the breakers
Internal view of IQ System Controller 3/3G
Wiring for service entrance
Install main and backup breakers
Breakers for IQ8 Systems without generator
Breakers for IQ8 Systems with generator
Section C
Wiring
Drill conduits
DER wiring
Aux wiring: System Shutdown Switch
Aux wiring: IQ Load Controller
Aux wiring: Generator control
Main/supply side wiring
Backup loads wiring
CT wiring
Wiring control (CTRL) cable to headers
Control (CTRL) wiring between system components
Close and energize IQ System Controller
Safety
Revision history

4 IQ System Controller 3/3G Quick Install Guide
With the exibility oered by Enphase Energy System, customers
can choose to install a system that caters to their current and future
energy needs.
The following illustrative scenarios showcase some of the capabilities:
Scenario 1
Note: The System Shutdown Switch is not used for IQ6, IQ7, and M Series
systems. Refer to the System Shutdown wiring section for details.
This gure shows the system conguration. For wiring,
follow the details in the wiring section.
Whole Home backup
with IQ System Controller 3
This is the preferred conguration for the backup of the entire main
load panel. This conguration supports up to an 80 A breaker for PV
and up to 2x 80 A breakers for the IQ Batteries.
The microinverter ranges supported in this conguration are IQ8 or
IQ6/7 or M Series.

IQ System Controller 3/3G Quick Install Guide 5
Scenario 1a
Whole Home backup with
IQ System Controller 3G
This is the preferred conguration for the backup of the entire main
load panel. This conguration supports up to an 80 A breaker each
for the PV, IQ Battery, and generator (optional).
The microinverter ranges supported in this conguration are IQ8 or
IQ6/7 or M Series.
Note: The System Shutdown Switch is not used for IQ6, IQ7, and M Series
systems. Refer to the System Shutdown wiring section for details.
Additional wiring and components are required when integrating generators.
Refer to the Generator integration page for technical briefs and guides
https://enphase.com/installers/storage/generator.
This gure shows the system conguration. For wiring,
follow the details in the wiring section.

6 IQ System Controller 3/3G Quick Install Guide
Scenario 2
Partial Home backup with
IQ System Controller 3
This is the preferred conguration for partial home backup with
PV and IQ Batteries.
The microinverter ranges supported in this conguration are IQ8 or
IQ6/7 or M Series.
Note: The System Shutdown Switch is not used for IQ6, IQ7, and M Series
systems. Refer to the System Shutdown wiring section for details.
This gure shows the system conguration. For wiring,
follow the details in the wiring section.

IQ System Controller 3/3G Quick Install Guide 7
Scenario 2a
Partial Home backup with
IQ System Controller 3G
This is the preferred conguration for partial home backup with
PV and IQ Batteries. A generator can be integrated with IQ System
Controller 3G based on the homeowner’s needs.
The microinverter ranges supported in this conguration are IQ8 or
IQ6/7 or M Series.
Note: The System Shutdown Switch is not used for IQ6, IQ7, and M Series
systems. Refer to the System Shutdown wiring section for details.
Additional wiring and components are required when integrating generators.
Refer to the Generator integration page for technical briefs and guides
https://enphase.com/installers/storage/generator.
This gure shows the system conguration. For wiring,
follow the details in the wiring section.

8 IQ System Controller 3/3G Quick Install Guide
Partial Home backup with
Sunlight Backup
This is the preferred conguration for partial home backup using only
IQ8 PV i.e., Sunlight Backup. IQ Battery can be integrated with IQ System
Controller 3 based on the homeowner’s needs.
It is recommended that installers use two IQ Load Controllers for
load control to ensure seamless backup of essential loads using
IQ8 Microinverters. At least one IQ Load Controller is required to
successfully commission a Sunlight Backup system.
Do not install a Sunlight Backup system for a whole home backup
scenario.
This conguration can only be supported with IQ8 Series Microinverters.
Scenario 3
This gure shows the system conguration. For wiring,
follow the details in the wiring section.

IQ System Controller 3/3G Quick Install Guide 9
Partial Home backup with Sunlight
Backup and generator
This is the preferred conguration for partial home backup using only
IQ8 PV i.e., Sunlight Backup. A generator can be integrated with IQ System
Controller 3G based on the homeowner’s needs.
It is recommended that installers use two IQ Load Controllers for load
control to ensure seamless backup of essential loads using IQ8 Series
Microinverters. At least one IQ Load Controller is required to successfully
commission a Sunlight Backup system.
Do not install a Sunlight Backup system for a whole home backup
scenario.
This conguration can only be supported with IQ8 Series Microinverters.
Note: The System Shutdown Switch is not used for IQ6, IQ7, and M Series
systems. Referto the System Shutdown wiring section for details.
Additional wiring and components are required when integrating generators.
Refer to the Generator integration page for technical briefs and guides
https://enphase.com/installers/storage/generator.
Scenario 3a
This gure shows the system conguration. For wiring,
follow the details in the wiring section.

10 IQ System Controller 3/3G Quick Install Guide
What’s in the box
IQ System Controller 3/3G Wall-mounting bracket System Shutdown Switch
Comes pre-wired with 4 x 20 ft.
color-coded wires.
Accessory kit
ITEM NAME ITEM CATEGORY DESCRIPTION QUANTITY
Filler Cover Mounting BKT-L 200G Enpower Plastic part Filler Cover Mounting BKT-L 200G 2
Filler Cover Mounting BKT-R 200G Enpower Plastic part Filler Cover Mounting BKT-R 200G 2
Screw, Pan Hd, Phillips #3, M6 x 25 mm Lg (5 mm
Shank - 20 mm Thread), Machine, 304 SS Fastener
Screw, Pan Hd, Phillips #3, M6 x 25 mm
Lg (5 mm Shank - 20 mm Thread),
Machine, 304 SS
2
Screw, Pan Hd, Torx X20, Machine,
#8-32 UNC, 0.63" Lg, A2-70 Fastener Screw, Pan Hd, Torx X20, Machine, #8-32 UNC, 0.63" Lg, A2-70 1
Lit Kit Label, Enpower 200G Label Lit Kit Label, IQ System Controller 200G 1
Label, Enpower, CT Field Label 6
Label, Enpower, PCS Field Label 2
Feed-through header with Cable Assy Header
Enpower 200G R2 Cable assembly System Shutdown feed-through header with cable assembly 1
NEC Labels for Rapid Shutdown Label Labels required as per NEC
for Rapid Shutdown 2

IQ System Controller 3/3G Quick Install Guide 11
Tools/additional
items required
S. NO ITEM NAME QUANTITY SOURCE
1 CT-200-CLAMP 3 IQ Combiner/Enphase Store
2 EP200G-HNDL-R1 (lifting handle) 1 Enphase Store
3 Breakers, dierent ratings 4 Enphase Store/retail outlets
4 Conduits (with ttings and tting tools) As required Provided by installer
5 Drill 1 Provided by installer
6 5/32" pilot bit 1 Provided by installer
7 Screwdriver 1 Provided by installer
8 Wrench 1 Provided by installer
9 Adjustable wrench 1 Provided by installer
10 Torque wrench 1 Provided by installer
11 Level 1 Provided by installer
12 5/32" Allen key 1 Provided by installer
13 Conductor stripper 1 Provided by installer
14 Electrician’s hole saw (2") or punch set 1 Provided by installer
15 Stud nder (if required) 1 Provided by installer
16 Conduit ground hub rings 1 Provided by installer
17 #10,1/4" or 5/16" lag bolts or screw 3" long (depending
on attaching wall) for each wall-mount bracket As required Provided by installer
18 Control wire As required Distribution/Enphase Store*
* Enphase SKU for control cable: CTRL-SC3-NA-01

12 IQ System Controller 3/3G Quick Install Guide
Plan a location for the
IQ System Controller
Mounting the product
Section A
• IQ System Controller is NEMA type 3R rated and can be mounted both indoors
and outdoors. Install the unit where it is not exposed to direct rainfall.
• Install this product where cables from PV/IQ Combiner, grid, and IQ Battery
are easily accessible and can be terminated at the IQ System Controller.
• This product is designed to be installed on a vertical wall only. Do not install
this product at on the ground.
• The mounting surface must be able to support 87 lbs.
• Follow all local standards and regulations during installation.
• The product operates within an ambient temperature range from -40°C to 50°C.
• Do not install this product in a place where it is directly exposed to sunlight.
• Do not install the product in a very dusty environment.
• This product must not be installed at altitudes above 8,200 ft (2,500 m).
• In ood-prone areas, ensure that the clearance from the ground is sucient to
avoid water ingress.
-40°C
+50°C

IQ System Controller 3/3G Quick Install Guide 13
6 in
35 in
36 in
6 in
6 in
19.7 in
36 in
9.7 in
This product must be installed with clearance at the left, right, top,
bottom, and front of the product as shown in the gure.
Follow all local standards and regulations related to the mounting of
an IQ System Controller.
Section A - Mounting the product
Step 1:
Minimum clearance

14 IQ System Controller 3/3G Quick Install Guide
6
Step 2:
Install the mounting bracket
Install the mounting bracket and mount the IQ System Controller
as per the following instructions:
• Use 3" long wood screw #10, 1/4", or 5/16" (depending on
the attachment wall) or masonry attachments if installed in
masonry to attach the IQ System Controller bracket. Use one
screw and washer for each slot. The slot size of the IQ System
Controller wall mount bracket is 8.5 mm.
• Check with a structural engineer and local standards for local
requirements. Use an appropriately sized washer for each of the
screws.
Provided in the accessory kit
21
4
3
5
• The IQ System Controller weighs 39.4 kg (87 lbs) and will
require two people to lift the unit.
• Risk of injury and equipment damage. Avoid dropping the
IQ System Controller. Doing so may create a hazard, cause
serious injury, and/or damage the equipment.
• Risk of injury and equipment damage. Do not release the
IQ System Controller until you ensure that the IQ System
Controller is fully seated in the wall-mount bracket shelf.
Section A - Mounting the product

IQ System Controller 3/3G Quick Install Guide 15
Step 3:
Open the dead front
Before removing the dead front, ensure the IQ System Controller
is completely de-energized.
Risk of equipment damage. Do not wire the IQ System
Controller when it is energized.
• Risk of equipment damage. Do not remove the pre-installed
solar shield attached to the enclosure door.
• Risk of electric shock. Do not modify the dead front other
than to remove or replace ller plates, as needed. The product
warranty can be aected in case of modication.
Philips screw #2
Section A - Mounting the product
1
2 3
The ground connection to the dead front needs to
be carefully disconnected before the dead front can
be dismantled from the IQ System Controller.

16 IQ System Controller 3/3G Quick Install Guide
Main lugs
Neutral terminals
Ground terminals
Load center for
DER breakers
Backup lugs
AUX and System
Shutdown terminals
Terminals for
DER cables
Internal view of
IQ System Controller 3/3G
The following gure shows the IQ System Controller 3/3G after
the dead front is removed. It comes with an inbuilt neutral forming
transformer, microgrid interconnection device, automatic transfer
switch, and a panel board to mount plug-in type breakers.
Section B
Mounting the breakers
Hold-down kit

IQ System Controller 3/3G Quick Install Guide 17
If the IQ System Controller is used as service entrance
equipment:
• Do not remove the green-colored system bonding jumper
• Paste labels provided in the accessory kit
If the IQ System Controller is NOT used as a service entrance
equipment:
• Remove the system bonding jumper wire
Grounding Electrode Terminal
Grounding Electrode Terminal
Main/Service Disconnect
Suitable for use as Service Equipment
Magnied view
Main/Service Disconnect
Suitable for use as Service Equipment
Wiring for service entrance
Section B - Mounting the breakers
Magnied view
Label
Label

18 IQ System Controller 3/3G Quick Install Guide
Install main and backup
breakers
If breakers are being installed for main and backup connections,
the lugs should be removed, and the breakers should be installed.
Only Eaton CSR range breakers with ratings between 100 A-200 A
can be used for the main and backup connections.
Risk of equipment damage. Do not wire the IQ System
Controller when it is energized.
Backup connection Main connection
Screw part of
Eaton breaker kit
Screw part of
Eaton breakerkit
Torx - T20
13.3 lb.in
Torx - T20
13.3 lb.in
3/8 in
48 lb.in
Hex nut from lugs
to be reused for
breakers or refer to
Eaton’s installation
manual for screw
recommendation
3/8 in
48 lb.in
Hex nut from
lugs to be reused
for breakers or
refer to Eaton’s
installation
manual for screw
recommendation
Section B - Mounting the breakers
ENPHASE BREAKER SKU EATON BREAKER PART
BRK-100A-2P-240V CSR2100N
BRK-125A-2P-240V CSR2125N
BRK-150A-2P-240V CSR2150N
BRK-175A-2P-240V CSR2175N
BRK-200A-2P-240V CSR2200N

IQ System Controller 3/3G Quick Install Guide 19
The IQ System Controller 3 comes pre-installed with a quad
breaker for the neutral forming transformer (NFT) and IQ Gateway.
The hold-down kit for the breakers is factory installed in the
IQ System Controller 3. Loosen the screw (use Philips head
screwdriver #1) and pull the hold-down kit arm up, to install the
breakers. After the breaker installation, pull down the hold-down
kit arm and tighten the screw with torque 1.7 lb.in (0.6 N m).
Storage breaker
Use the factory-installed hold-
down kit along with a correctly
sized breaker
Hold-down kit arm
Hold-down kit screw
Section B - Mounting the breakers
NOTE:
The cable used to connect IQ Gateway power terminals to
the quad breaker must adhere to local electrical codes.
Solar breaker
Use the factory-installed
hold-down kit along with a
correctly sized breaker
Storage breaker
Use the factory-installed
hold-down kit along with a
correctly sized breaker
Pre-wired red and black wires
Connect to storage and solar
breakers
Pre-wired red and black wires
Connect to DER breaker
Breakers for IQ8 Systems
without generator
ENPHASE BREAKER PART EATON BREAKER PART TORQUE
BRK-20A-2P-240V BR220
27 lb.in
BRK-40A-2P-240V BR240
BRK-60A-2P-240V BR260
BRK-80A-2P-240V BR280
BRK-20A40A-4P-240V BQC220240
NFT and IQ Gateway breaker
Factory installed quad breaker
(Siemens or Eaton). NFT pre-
wired to 40 A terminal of the
quad breaker. Connect
IQ Gateway L1 and L2 to 20 A L1,
L2 terminals of the quad breaker
respectively
L1 - IQ Gateway
L1 - NFT
L2 - NFT
L2 - IQ Gateway
L1 - NFT
L1 - IQ Gateway
L2 - IQ Gateway
L2 - NFT
Siemens breaker
Eaton breaker

20 IQ System Controller 3/3G Quick Install Guide
IQ System Controller 3G allows for generator integration with the
Enphase Energy Systems. The breaker on the bottom right slot of
the panel board can be sized and used to integrate the generator.
For generator control and power line schematics, refer to the
generator control section.
The hold-down kit for the breakers is factory installed in the
IQ System Controller 3G. Loosen the screw (use Philips head
screwdriver #1) and pull the hold-down kit arm up, to install the
breakers. After the breaker installation, pull down the hold-down
kit arm and tighten the screw with torque 1.7 lb.in (0.6 N m).
Breakers for IQ8 Systems
with generator
ENPHASE BREAKER PART EATON BREAKER PART TORQUE
BRK-20A-2P-240V BR220
27 lb.in
BRK-40A-2P-240V BR240
BRK-60A-2P-240V BR260
BRK-80A-2P-240V BR280
BRK-20A40A-4P-240V BQC220240
Section B - Mounting the breakers
NOTE:
The cable used to connect IQ Gateway power terminals to
the quad breaker must adhere to local electrical codes.
Hold-down kit screw
Generator breaker
Use the factory-installed hold-
down kit along with a correctly
sized breaker
Hold-down kit arm
NFT and IQ Gateway breaker
Factory installed quad breaker
(Siemens or Eaton). NFT pre-
wired to 40 A terminal of the
quad breaker. Connect
IQ Gateway L1 and L2 to 20 A L1,
L2 terminals of the quad breaker
respectively
Solar breaker
Use the factory-installed
hold-down kit along with a
correctly sized breaker
Pre-wired red and black wires
Connect to storage and solar
breakers
Pre-wired red and black wires
Connect to generator breaker
Storage breaker
Use the factory-installed
hold-down kit along with a
correctly sized breaker
L1 - IQ Gateway
L1 - NFT
L2 - NFT
L2 - IQ Gateway
L1 - NFT
L1 - IQ Gateway
L2 - IQ Gateway
L2 - NFT
Siemens breaker
Eaton breaker