CanadianSolar CSI-75K-T40001-E User manual

CSI-75K-T40001-E
CSI-100K-T4001A-E
CSI-100K-T4001B-E
CSI-110K-T4001A-E
CSI-110K-T4001B-E
CSI-120K-T4001A-E
CSI-120K-T4001B-E
PV Inverter User Manual
(Part No: 91000076; Release Date: February, 2023)

Contents
All Rights Reserve _____________________________________________________________________________________ 1
About This Manual ____________________________________________________________________________________ 1
Limitation of Liability___________________________________________________________________________________1
Target Group _____________________________________________________________________________________________1
Symbol Conventions_____________________________________________________________________________________1
1 Safety__________________________________________________________________________________________________ 2
1.1 Utility Grid ___________________________________________________________________________________________2
1.2 Inverter _______________________________________________________________________________________________2
1.3 Skills of Qualified Personnel________________________________________________________________________3
2 Product Introduction _______________________________________________________________________________ 3
2.1 Intended Usage _____________________________________________________________________________________3
2.2 Product Introduction _______________________________________________________________________________4
2.2.1 Appearance and dimension _________________________________________________________________________________________4
2.2.2 LED Indicator Panel __________________________________________________________________________________________________5
2.3 Circuit Diagram ______________________________________________________________________________________5
2.4 Function Description________________________________________________________________________________6
3 Unpacking and Storage ____________________________________________________________________________ 6
3.1 Unpacking and Inspection_________________________________________________________________________6
3.2 Identifying the Inverter ___________________________________________________________________________7
3.3 Scope of Delivery ___________________________________________________________________________________8
3.4 Storage________________________________________________________________________________________________8
4 Mechanical Mounting_______________________________________________________________________________ 9
4.1 Safety during Mounting ___________________________________________________________________________9
4.2 Location Requirements_____________________________________________________________________________9
4.2.1 Installation Environment Requirements_____________________________________________________________________________9
4.2.2 Carrier Requirements _________________________________________________________________________________________________9
4.2.3 Installation Angle Requirements__________________________________________________________________________________ 10
4.2.4 Installation Clearance Requirements ______________________________________________________________________________ 10
4.3 Moving the Inverter______________________________________________________________________________ 10
4.3.1 Manual Transport ___________________________________________________________________________________________________ 10
4.3.2 Hoisting Transport _________________________________________________________________________________________________ 11
4.4 Assembling the mounting-bracket ______________________________________________________________ 12
4.5 Standard C or U Steel Installation_____________________________________________________________ 12
4.6 Steel Frame Installation __________________________________________________________________________ 12
4.7 Wall-Mounted Installation________________________________________________________________________ 13
4.8 Inverter Installation ______________________________________________________________________________ 13

5 Electrical Connection ______________________________________________________________________________ 14
5.1 Safety _______________________________________________________________________________________________ 14
5.2 Electrical Connection Overview __________________________________________________________________ 14
5.3 Connecting the PE Cable _________________________________________________________________________ 15
5.3.1 Additional Grounding Requirements_______________________________________________________________________________ 15
5.3.2 Connection Procedure ______________________________________________________________________________________________ 15
5.4 Communication Cable Connection _____________________________________________________________ 16
5.4.1 Opening the Wiring Compartment_______________________________________________________________________________ 16
5.4.2 Communications Interface Description ___________________________________________________________________________ 17
5.4.3 RS485 Communication______________________________________________________________________________________________ 17
5.4.4 Dry Contact Connection ____________________________________________________________________________________________ 20
5.4.5 Data Logger Connection __________________________________________________________________________________________ 22
5.5 AC Cable Connection _____________________________________________________________________________ 22
5.5.1 AC Side Requirements ______________________________________________________________________________________________ 22
5.5.2 Connection Procedure ______________________________________________________________________________________________ 23
5.5.3 Aluminium Cable Requirement ___________________________________________________________________________________ 25
5.6 Tracker System Power Supply Connection (Optional) _______________________________________ 25
5.7 Closing the Wiring Compartment________________________________________________________________ 26
5.8 DC Cable Connection ______________________________________________________________________________ 26
5.8.1 PV Input Configuration _____________________________________________________________________________________________ 27
5.8.2 DC input Terminals Configuration ________________________________________________________________________________ 27
5.8.3 DC cable connection _______________________________________________________________________________________________ 29
5.8.4 Installing the PV Connectors. _______________________________________________________________________________________ 29
6 Commissioning Inverter___________________________________________________________________________ 30
6.1 Electrical Inspection ______________________________________________________________________________ 30
6.2 Commissioning Procedure________________________________________________________________________ 30
7 CSI CloudPro APP __________________________________________________________________________________ 31
7.1 APP Introduction__________________________________________________________________________________ 31
7.2 Download and Install the App _________________________________________________________________ 31
7.3 Use the Local Mode to Login the App________________________________________________________ 31
8 System Decommissioning _________________________________________________________________________ 34
8.1 Disconnecting the Inverter _______________________________________________________________________ 34
8.2 Dismantling the Inverter _________________________________________________________________________ 34
8.3 Disposal of the Inverter ___________________________________________________________________________ 34
9 Daily Maintenance _________________________________________________________________________________ 34
10 Troubleshooting ___________________________________________________________________________________ 38
10.1 Warning ___________________________________________________________________________________________ 38
10.2 Errors ______________________________________________________________________________________________ 38
ANNEX: Specification _________________________________________________________________________________ 40

All Rights Reserve
1 / 41
All Rights Reserve
This manual provides important safety information on relating to the installation, maintenance and usage of three
phase PV inverters. Both users and professional installers must read these guidelines carefully and strictly follow
these instructions. Failure to follow these instructions may result in death, serious injury or property damage.
Only qualified professionals and service personnel can do the installation and operation (refer to 62109-1). Installers
must inform end-users (consumers) about the aforesaid information accordingly.
This manual is only valid for the PV inverter types: CSI-75K-T40001-E, CSI-100K-T4001A-E, CSI-100K-T4001B-E, CSI-
110K-T4001A-E, CSI-110K-T4001B-E, CSI-120K-T4001A-E and CSI-120K-T4001B-E produced by CSI Solar Co., Ltd.
About This Manual
The information contained in this manual is subject to change by CSI Solar Co., Ltd. without prior notice. CSI Solar Co.,
Ltd. gives no warranty of any kind whatsoever, either explicitly or implicitly, with respect to the information contained
herein.
In the event of any inconsistency among different language versions of this document, the English version shall
prevail. Please refer to our product lists and documents published on our website at: http://www.csisolar.com as
these lists are updated on a regular basis.
Limitation of Liability
CSI Solar Co., Ltd. shall not be held responsible for damages of any kind, including-without limitation-bodily harm,
injury or damage to property, in connection with handling PV inverters, system installation, or compliance or non-
compliance with the instructions set forth in this manual.
Target Group
This document is intended for installers and users.
Symbol Conventions
The Important instructions contained in this manual should be followed during installation, operation and
maintenance of the inverter. They will be highlighted by the following symbols.
Symbol
Description
DANGER
Indicates ahazard with ahigh level of risk that, if not avoided, will result in death or serious injury.
WARNING
Indicates a hazard with a medium level of risk that, if not avoided, could result in death or serious
injury.
CAUTION
Indicates ahazard with alow level of risk that, if not avoided, could result in minor or moderate injury.
NOTICE
Indicates asituation that, if not avoided, could result in equipment or property damage.
Information
Indicates additional information, emphasized contents or tips thatmay be helpful, e.g. to help you solve
problems or save time.

1 Safety
2 /41
1 Safety
The inverter has been designed and tested strictly according to international safety regulations. Read all safety
instructions carefully prior to any work and observe them at all times when working on or with the inverter.
Incorrect operation or work may cause:
· Injury or death to the operator or athird party; or
· Damage to the inverter and other property safety of the operator or a third party. All detailed work-related safety
warning and notes will be specified at critical points in this manual.
Notice:
The safety instructions in this manual cannot cover all the precautions that
should be followed. Perform operations considering actual onsite conditions.
CSI Solar shall not be held liable for any damage caused by violation of the safety instructions in this manual.
DANGER
PV strings will produce electrical power when exposed to sunlight and can cause a lethal
voltage and an electric shock.
• Always keep in mind that the inverter is dual power supplied. Electrical operators must
wear proper personal protective equipment: helmet, insulated footwear, glove, etc.
• Before touching the DC cables, operator must use a measuring device to ensure that the
cable is voltage - free.
• Follow all warnings on the PV strings and in its manual.
1.1 Utility Grid
Please follow the regulations related to the utility grid.
NOTICE
• All electrical connections must be in accordance with local and national standards.
• Only with the permission of the utility grid, the inverter can be connected to the utility grid.
1.2 Inverter
Symbol
Description
DANGER
Danger to life from electric shocks due to live voltage
Do not open the enclosure at any time. Unauthorized opening will void guarantee and
warranty claims and in most cases terminate the operating license.
WARNING
Risk of inverter damage or personal injury!
• Do not pull out the PV connectors when the inverter is running.
• Wait at least 5 minutes for the internal capacitors to discharge. Ensure that there is no
voltage or current before pulling any connector.
CAUTION
Risk of burns due to hot components!
Do not touch any hot parts (such as heat sink) during operation. Only the DC switch can safely
be touched at any time.
NOTICE
Only qualified personnel can perform the country setting.
• Unauthorized alteration of the country setting may cause abreach of the type-certificate
marking.
By touching the electronic components, you may damage the inverter. For inverter handling, be
sure to:
• avoid any unnecessary touching;and,
• wear agrounding wristband before touching any connectors.
Persons with limited mobility or mentally retarded are not allowed to operate the inverters.

2 Product Introduction
3 / 41
Warning Label
Symbol
Description
Hot surfaces!
Risk of burns due to hot components!
Disconnect the inverter from all the external power sources before service!
Danger to life due to high voltage!
Time need to discharge stored energy in the capacitors.
Grounding
Direct Current (ＤＣ)
Alternating Current(ＡＣ)
1.3 Skills of Qualified Personnel
All installations should be performed by qualified personnel. They should have:
-Training in the installation and commissioning of the electrical system, as well as the dealing with hazards.
-Knowledge of the manual and other related documents.
-Knowledge of the local regulations and directives.
2 Product Introduction
2.1 Intended Usage
The inverter is a transformerless three-phase PV grid-connected inverter, is an integral component in the PV power
system.
This document involves the following product models:
CSI-75K-T40001-E, CSI-100K-T4001A-E, CSI-100K-T4001B-E, CSI-110K-T4001A-E, CSI-110K-T4001B-E, CSI-120K-T4001A-E
and CSI-120K-T4001B-E.
The inverter is designed to convert the direct current power generated from the PV modules into grid-compatible AC
current and feeds the AC current to the utility grid. The intended usage of the inverter is illustrated in figure as bellow,
inverter application in PV power system.
A B C D E
A) PV string; B) Inverter; C) AC distribution box/cabinet; D) Transformer station; E) Utility grid
FIG. 2-1 Inverter application in PV power system
WARNING
Inverter cannot connect the PV strings whose positive and negative terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit breaker.
L1
L2
L3
N
PE
PV INVERTER
L1 L2 L3 NPE
TN-S
L1
L2
L3
PEN
PV INVERTER
L1 L2 L3 NPE
TN-C
L1
L2
L3
N
PE
PV INVERTER
L1 L2 L3 NPE
TN-C-S
L1
L2
L3
N
PV INVERTER
L1 L2 L3 NPE
TT
L1
L2
L3
PV INVERTER
L1 L2 L3 PE
IT
PE PE
FIG 2-2 Power grid types supported by the inverter

2 Product Introduction
4 /41
2.2 Product Introduction
2.2.1 Appearance and dimension
1050mm 355mm
687mm
1 6
3
4
5
2
3
4
5
2
7
8
9
CSI-120K-T4001A-E
CSI-110K-T4001A-E
CSI-75K-T40001-E
COMM. PORT-1
VENT VALVE
AC OUTPUT
MPPT-6
PV-11 PV-12
MPPT-5
PV-9 PV-10
MPPT-4
PV-7 PV-8
MPPT-3
PV-5 PV-6
MPPT-2
PV-3 PV-4
MPPT-1
PV-1 PV-2
DO NOT DISCONNEC T UNDER LOAD!
DC SWITCH-2
ON
OFF
DC SWITCH-1
ON
OFF
COMM. PORT-4
COMM. PORT-2
COMM. PORT-3 COMM. PORT-5
AUX. PORT GROUN DING
17 1211 16 10 15 13 14
CSI-100K-T4001A-E
CSI-120K-T4001B-E
CSI-110K-T4001B-E
COMM. PORT-1
VENT VALVE
AC OUTPUT
MPPT-9
PV-17 PV-18
MPPT-8
PV-15 PV-16
MPPT-7
PV-13 PV-14
MPPT-6
PV-11 PV-12
MPPT-5
PV-9 PV-10
MPPT-4
PV-7 PV-8
MPPT-3
PV-5 PV-6
MPPT-2
PV-3 PV-4
MPPT-1
PV-1 PV-2
DO NOT DISCO NNECT UNDER L OAD!
DC SWITCH-3
ON
OFF
DC SWITCH-2
ON
OFF
DC SWITCH-1
ON
OFF
COMM. PORT-4
COMM. PORT-2
COMM. PORT-3 COMM. PORT-5
AUX. PORT GROUNDING
17 1211 16 10 15 13 14
CSI-100K-T4001B-E
FIG 2-3 Product introduction (The picture is for reference only)
1.LED indicator Panel
10. Cable gland for communication
2.Side handles and mounting ears
11.PV input connectors
3.Bottom handles
12.DC disconnect switch
4.M12 holes for lifting eyes or hand shanks
13.Cable gland for AC output
5.M12 holes for hand shanks
14.Cable gland for interior grounding
6.Additational grounding points
15.Reserved auxiliary port
7.Rating label
16.Communication connector for data logger
8.Warning label
17.Breather valve
9.The cover of outer fan module

2 Product Introduction
5 / 41
2.2.2 LED Indicator Panel
As an HMI, the LED indicator panel on the front of the inverter can indicate the present working state of the inverter.
LED indicator
LED state
Definition
PV connection indicator
Steady green
At least one PV string is properly connected, and the
DC input voltage of the corresponding MPPT circuit is
at least 200V.
Off
The solar inverter disconnects from all PV strings, or
the DC input voltage of all MPPT circuits is less than
200V.
Grid connection indicator
Steady green
The solar inverter is in grid-tied mode.
Blinking green
The solar inverter is in self-test mode or wait mode.
Off
The solar inverter is not in grid-tied mode.
Communications/Maintenance
indicator
Blinking green
The solar inverter receives communication data
normally
Off
The solar inverter has not receives communication data
for 10 seconds.
Steady green
The solar inverter is in maintenance status
Alarm indicator
Steady red
A major alarm is generated.
Blinking red
A minor or warning alarm is generated.
Off
No alarm
Turn the DC switches to the ON position before restarting the inverter.
2.3 Circuit Diagram
The MPPT is utilized for DC input to ensure the maximum power from the PV array at different PV input conditions.
The inversion circuit converts the DC power into AC power and feeds the AC power into the utility grid through the AC
terminal. The protection circuit is equipped to ensure the safe operation of the device and personal safety.
The following figure shows the main circuit of the inverter.
DC EMI
Filter
MPPT1
（Boost1）
AC Filter AC EMI
Filter
AC SPD
DC SPD
+
-
DC1
DC
Switch
+
-
DC9
Current
Monitoring
MPPT9
（Boost9）
DC BUS Inverter Circuit
(DC/AC)
AC Relays
L1
L2
L3
N
PE
FIG 2-4 Product topological diagram

3 Unpacking and Storage
6 /41
2.4 Function Description
The inverter is equipped with the following functions:
1) Conversion function
The inverter converts the DC current into grid-compatible AC current and feeds the AC current into the grid.
2) Data storage
The inverter logs running information, error records, etc.
3) Parameter configuration
The inverter provides various settable parameters. Users can set parameters via the App to meet the requirements and
optimize the performance.
4) Communication interface
The inverter is designed with standard RS485 communication interfaces.
The standard RS485 communication interfaces are used to establish communication connection with monitoring
devices and upload monitoring data by using communication cables.
After communication connection is established, users can view inverter information or set inverter parameters through
the iSolarCloud.
5) Protection Function
The protective functions are integrated in the inverter, including anti-island protection, LVRT/ZVRT, DC reversed polarity
protection, AC short circuit protection, leakage current protection, DC overvoltage/overcurrent protection, etc.
6) PID function (optional)
After the PID function is enabled, the voltage to ground of all PV modules is greater than 0, that is, the PV module-to-
ground voltage is a positive value.
3~
FIG 2-5 PID functional system diagram
NOTICE
• Before enabling the PID recovery function, make sure the voltage polarity of the PV modules to
ground meets requirement. If there are any questions, contact the PV module manufacturer
or read its corresponding user manual.
• If the voltage scheme for the PID protection/recovery function does not meet the
requirement of corresponding PV modules, the PID function will not work as expected or
even damage the PV modules.
• Anti-PID function
When the inverter is running, the PID function module rises the potential between the negative pole of the PV array and
the ground to a positive value, to suppress the PID effect.
Make sure the inverter is applied to an IT system before enabling the anti-PID function.
• PID recovery function
When the inverter is not running, the PID module will apply inverse voltage to PV modules, to restore the degraded
modules.
• If the PID recovery function is enabled, it only works at night.
• After the PID recovery function is enabled, the voltage of the PV string to ground is 500Vdc by
default, and the default value can be modified through the App.
3 Unpacking and Storage
3.1 Unpacking and Inspection
Before unpacking the inverter, check the package appearance thoroughly, such as for holes and cracks, and check the

3 Unpacking and Storage
7 / 41
inverter model accordingly. If you discover any damage to the packaging which indicates the inverter may have been
damaged, or the inverter model is not the one you requested, do not unpack the product and contact your dealer
immediately.
After opening the package, check all of the accessories carefully in the carton. If any damage is found or any
component is missing, contact your local installer.
3.2 Identifying the Inverter
The nameplate provides a unique identification of the inverter (Product type, device -specific characteristics,
certificates and approvals).
The nameplate is on the left side of the enclosure.
Made in China
3/N/PE ~ 230/400V
3/N/PE ~ 220/380VAC Nominal Voltage: 120kVAMax. Output apparent Power:
lProtection Class:
-30 C...+60 COperatingTemperature Range: IP66Degree of Protection: ll(DC), lll(AC)Overvoltage Class:
0.8 leading...0.8 laggingPower Factor: AC 182.3AMax. Output Current: 50/60HzAC Nominal Frequency:
120kWRated Output Power:
DC 9 x 40AIsc PV(absolute max.): DC 9 x 30AMax. Input Current: DC 200-1000VMPPT Voltage Range: DC 1100VVmax. PV(absolute max.):
CSI-120K-T4001B-EModel Number: Grid-connected PV Inverter
Product Name:
Scanning for
more information
tuv-sud.com/
ps-cert
Type
tested
Production
monitored
1
2
3
4
5
(1) Company name and product model
(2) Important technical specifications
(3) Compliance symbols
(4) Series number
(5) QR Code for user manual
FIG 3-1Inverter Nameplates (for reference)

3 Unpacking and Storage
8 /41
3.3 Scope of Delivery
PV inverter(x1) Mouinting bracket(x1set)
Screw flat head M4x8(x4) Hand shank(x4)(optional)
Bolt M6x30(x2)
Nut M10(x4)
PV connector Documents
Bolt M10x40(x4)
FIG 3-2 Scope of supply diagram (The actual configuration in order to prevail in kind)
Note (PV connector): CSI-75K-T40001-E (x12 pairs)
CSI-100K-T4001A-E, CSI-110K-T4001A-E, CSI-120K-T4001A-E (x12 pairs)
CSI-100K-T4001B-E, CSI-110K-T4001B-E, CSI-120K-T4001B-E (x18 pairs)
3.4 Storage
The following requirements should be met when the inverters need to be stored:
Storage temperature: –40°C ~ +70°C.
Storage humidity: 0% ~ 100%RH (Non-Condensing).
The warehouse should be clean, well-ventilated, and non-corrosive gas (corrosive or flammable gases), meanwhile it
should be accessible all the time.
No smoking, no illegal use of electricity and fire.
When storing inverters, do not stack more than the allowed layers to avoid damage, which number marked on the
product packaging.
4
4
Do not tilt the package or place it upside down.
Regular inspection is required during the storage.
If the inverter has been stored more than half a year, it must be checked and tested by professionals before put into
use.

4 Mechanical Mounting
9 / 41
4 Mechanical Mounting
4.1 Safety during Mounting
DANGER
Make sure there is no electrical connection before installation.
In order to avoid electric shock or other injury, be sure there is no electricity or plumbing
installations before drilling holes.
CAUTION
Risk of injury due to improper handling
• Always follow the instructions when moving and positioning the inverter.
• Improper operation may cause injuries, serious wounds, or bruise.
System performance loss due to poor ventilation!
Keep the heat sinks uncovered to ensure heat dissipation performance.
4.2 Location Requirements
Select an optimal mounting location for safe operation, long service life, and outstanding performance.
-The inverter with IP 66 can be installed both indoors andoutdoors.
-Install the inverter in a place convenient for electrical connection, operation, and maintenance.
4.2.1 Installation Environment Requirements
1) Do not install the inverter on the structures constructed of flammable, thermolabile or explosive materials.
2) Ensure the inverter is out of children's reach.
3) The ambient temperature should be between -30°C to 60°C.
4) The humidity of the installation location should be below 100% without condensation.
5) Do not install the inverter outdoors in salt, sulfur or other corrosive areas.
The inverter would be corroded in salt (i.e. marine environments) area, and the corrosion may cause fire. In salt area
refers to the region within 500 meters from the coast.
Please consult the CSI Solar Co., Ltd. technical support department on the use of inverters in special climates (i.e. salt,
sulfur, or ammonia areas) which may affect the product warranty.
6) Prevent the inverter from direct exposure to sun, rain and snow.
7) The inverter should be well ventilated. Ensure air circulation
8) Never install the inverter in living areas. The inverter will generate noise during operation, affecting daily life.
9) Install at at an appropriate height for ease of viewing LED indicators and operating switches
10) Do not install in small closed cabinet where air cannot circulate freely.
FIG 4-1 Installation site
4.2.2 Carrier Requirements
The installation carrier should meet the following requirements:
Made of non-inflammable materials;
Max. load bearing capacity ≥ 4 times of inverter weight.

4 Mechanical Mounting
10 /41
4.2.3 Installation Angle Requirements
Inverter vertically or at aminimum back tilt of 10°. Forward installation or upside down installation is prohibited.
Vertical Forward Upside downBackward
≥10
FIG 4-2 Installation angle
4.2.4 Installation Clearance Requirements
1) Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation. (The fans are
maintained on the left side of the inverter, and a larger clearance is required.)
In case the distance is less than 800mm, move the inverter from the mounting-bracket or wall before maintaining fans.
2) In case of multiple inverters, reserve specific clearance between the inverters.
≥600mm
≥800mm
≥1000mm
≥400mm
≥500mm
FIG 4-3 Single installation space FIG 4-4 Multiple installation space
3) In case of back-to-back installation, reserve specific clearance between the two inverters.
≥500mm
FIG 4-5 Back-to-back installation
4.3 Moving the Inverter
Move the inverter to the specified position before installation. The inverter can be moved manually or via ahoist.
4.3.1 Manual Transport
Step 1 Install four hand shanks into the corresponding M12 holes, which holes in the handles at side and bottom
of the inverter.
≥800mm ≥800mm ≥400mm

4 Mechanical Mounting
11 / 41
FIG 4-6 Transport hole location diagram
Step 2 Lift and move the inverter to the destination by using the side and bottom handles as well as the four installed
hand shanks.
Step 3 Remove the four hand shanks .
CAUTION
Inappropriate moving operation may cause personal injury!
• It is recommended that at least four installers carry the inverter together and wear
protective equipment such as smash - proof shoes and gloves.
• Always beware of the gravity center of the inverter and avoid tipping.
NOTICE
The ground surface on which the inverter is to be placed should be covered with a
sponge pad, foam cushion or the like to prevent the inverter bottom from scratches.
4.3.2 Hoisting Transport
Step 1: Install two M12 lifting eye nuts into the corresponding M12 holes at side handles of the inverter.
Step 2: Lead the sling through the two lifting eye nuts and fasten the tie-down strap.
Step 3: Hoist the inverter, and stop to check for safety when the inverter is 100mm above the ground. Continue
hoisting the device to the destination after ensuring the safety.
Step 4: Remove the two lifting eye nuts.
FIG 4-7 Lifting and handing schematic diagram
CAUTION
Keep the inverter balanced throughout the hoisting process and avoid collisions with walls or
other objects.
Stop hoisting in the event of severe weather, such as heavy rain, thick fog, or strong wind.
The lifting rings and the sling are not within the delivery scope.

4 Mechanical Mounting
12 /41
4.4 Assembling the mounting-bracket
Dimensions of the assembled mounting-bracket are as follows.
Assemble the mounting-bracket by using the connecting bar.
1000.5
250
1060.5
355
2-Ø12
12
20
12
20
M4
PH2 1.5N.m
FIG 4-8 Assembly mounting bracket
4.5 Standard C or U Steel Installation
Mounting Steps:
Step 1 Localize the hole positions in C or U-section steel to install mounting bracket.
Step 2 Secure the mounting bracket with M10 bolts and nuts.
M10
30N.m
FIG 4-9 Locate the mounting hole
4.6 Steel Frame Installation
Mounting Steps:
Step 1: Level the assembled mounting-bracket by using a level, and mark the positions for drilling holes on the steel
frame. Drill the holes by using a hammer drill.
Step 2: Secure the mounting-bracket with M10 bolts and nuts.
Ø12
M10
30N.m
FIG 4-10 Install the wall bracket

4 Mechanical Mounting
13 / 41
4.7 Wall-Mounted Installation
Mounting Steps
Step 1: Level the assembled mounting-bracket by using a level, and mark the positions for drilling holes on the
installation site.
Step 2: Insert the expansion bolts into the holes and secure them with arubber hammer. Fasten the nut with a wrench
to expand the bolt. Remove the nut, spring washer, and flat washer, and store them properly.
Step 3: Fix the mounting-bracket with the expansion bolts.
(Note: No expansion bolt is supplied.)
M10
30N.m
FIG 4-11 Install the wall bracket
Note: No expansion bolt is supplied.
4.8 Inverter Installation
Step 1: Take out the inverter from the packing carton.
Step 2: Hoist the inverter to the installation position when necessary (refer to "4.3.2 Hoisting Transport"). If the
installation position is not high enough, skip performing this step.
Step 3: Hang the inverter to the mounting-bracket and ensure that the mounting ears perfectly engage with the
mounting-bracket.
Step 4: Fix the inverter with screws M6x30.
M6
4.5
N.m
FIG 4-12 Install the inverter

5 Electrical Connection
14 /41
5 Electrical Connection
5.1 Safety
Prior to any electrical connections, keep in mind that the inverter has dual power supplies.
It is mandatory for the qualified personnel to wear personal protective equipments (PPE) during the electrical work.
DANGER
• Danger to life due to ahigh voltage inside the inverter!
• The PV string will generate lethal high voltage when exposed to sunlight.
• Before starting electrical connections, disconnect the DC and AC circuit. breakers and
prevent them from inadvertent reconnection.
• Ensure that all cables are voltage free before performing cable connection.
WARNING
• Any improper operations during cable connection can cause device damage or personal injury.
• Only qualified personnel can perform cable connection.
• All cables must be undamaged, firmly attached, properly insulated and adequately
dimensioned.
NOTICE
• Comply with the safety instructions related to the PV strings and the regulations related to
the utility grid.
• All electrical connections must be in accordance with local and nationalstandards.
• Only with the permission of the utility grid, the inverter can be connected to the utility grid.
5.2 Electrical Connection Overview
Electrical connection in the PV system includes additional grounding connection, AC connection, and PV string
connection.
1
2
34
ABC D E
5
A）PV string; B）Inverter; C）AC distribution box/cabinet; D）Utility grid; E）Monitoring device
FIG 5-1 General electrical connection diagram
Table 5-1 Recommended Cables
No.
Cable Name
Cable Type
Conductor Cross-Sectional Area
Outer
Diameter
1
DC cable
PV cable, complying with 1500V
standard
4~6mm²
6~9mm
2
Additional
Grounding cable
Outdoor single core copper
conductor cable
The same as that of the PE wire in
the AC cable
N/A
3
AC cable
Four/Five-core outdoor copper or
aluminum cables*
1) 75KW: 4 or 5 x 50~185 mm²
75KW: 3 x 240+1 x 120mm²
2) 100~120KW: 4 or 5 x 70~185 mm²
100~120KW: 3 x 240+1 x 120mm²
26~57mm
PE wire: refer to "table 5-
2PE wire requirements"
4
Communication
cable
Shielded twisted pair (terminal
block)
0.5~1.5 mm²
4.5~6.5mm
CAT-5 Ethernet cable (RJ45)
N/A
5
Wireless
communication
N/A
N/A
N/A

5 Electrical Connection
15 / 41
*Acopper to aluminum adapter terminal is required when an aluminum cable is used.
For details, refer to "5.9.3 Aluminium Cable Requirements".
Table 5-2 PE wire requirements
Phase wire cros
s section S
PE wire cross
section
Outer Diamet
er
Note
S＞35 mm²
S/2
12~25mm
The specifications are valid only when the phase wire and PE
wire use the same material. If otherwise, ensure that the cross
section of PE wire produces a conductance equivalent to that
of the wire specified in the table.
Table 5-3 Power cable for tracking system
5.3 Connecting the PE Cable
WARNING
Since the inverter is a transformerless inverter, neither the negative pole nor the positive pole of the
PV string can be grounded. Otherwise, the inverter will not operate normally.
Connect the additional grounding terminal to the protective grounding point before AC cable
connection, PV cable connection, and communication cable connection.
The ground connection of this additional grounding terminal cannot replace the connection of the PE
terminal of the AC cable. Make sure those terminals are both grounded reliably.
5.3.1 Additional Grounding Requirements
All non-current carrying metal parts and device enclosures in the PV power system should be grounded, for example,
brackets of PV modules and inverter enclosure. When there is only one inverter in the PV system, connect the additional
grounding cable to a nearby grounding point.
When there are multiple inverters in the PV system, connect grounding points of all inverters and the PV array frames
to the equipotential cable (according to the onsite conditions) to implement an equipotential connection.
5.3.2 Connection Procedure
Step 1 Prepare the cable and terminal.
Step 2 Remove the screw on the grounding terminal and fasten the cable with awrench.
Step 3 Apply paint to the grounding terminal to ensure corrosion resistance.
L1
L2=L1+3mm L3=2L1
D
8.4≤D≤12.5mm
FIG 5-2 Install ground cables
Cable
Cable Type
Conductor Cross-Secti
onal Area
Outer Diameter
Voltage Level
Power cable for
tracking system
Outdoor copper
conductor cable
2 or 3 x 4~10mm²
12~25mm
Consistent with selected AC
cable

5 Electrical Connection
16 /41
8N.m
M8
FIG 5-2 Install ground cables
The grounding screws have been anchored to the side of the inverter before delivery, and
do not need to be prepared.
There are two grounding terminals. Use at least one of them to ground the inverter.
5.4 Communication Cable Connection
5.4.1 Opening the Wiring Compartment
Step 1 Loosen four screws on the front cover of the wiring compartment with screwdriver T30.
Step 2 Open the wiring compartment.
Step 3 Loosen two screws on the communication board, and remove the protection cover.
M6
T30
FIG 5-3 Open the Wiring Compartment

5 Electrical Connection
17 / 41
M4
PH2
FIG 5-3 Open the Wiring Compartment
Close the wiring compartment in reverse order after completing wiring operations.
5.4.2 Communications Interface Description
The following figure shows the position of the communication wiring board in the inverter as well as the terminals
equipped for the wiring board.
5.4.3 RS485 Communication
The inverter is equipped with four groups of RS485 communication port for external communication connection, which
are RS485_1, RS485_2, RS485_3, and RS485_4.
The terminal block interface and RJ45 interface have the same function with only wiring manner different. Select either
interface for cable connection.
5.4.3.1 Single-inverter communication system
In case of asingle inverter, select either terminal block interface (RS 485-1, and RS 485-3) or RJ45 interface(C1~C8) to
connect.
RS485-3
RS485-1 RS485-2
RS485-4 Meter/Tracker
A1B1PE+12V
RS485 RS485
Logger
PC
A1B1PE +12V
FIG 5-4 Communications Interface Description FIG 5-5 Single-inverter communication system
RS485-3
RS485-1 RS485-2
RS485-4
USB Dry
contact CAN DRMMeter/Tracker
120O
A1 B1 PE +12V
RS485 RS485
METER/TRACKER
DRM
USB
A1 B1 PE +12V
ON OFF
SW1
ON OFF
SW3
120O
120O
SW2
ON OFF
DRY CONN CAN