Sofar 100KTLX-G4 User manual

SOFAR 100-125KTLX-G4 User Manual

SOFAR 100-125KTLX-G4 User Manual
CONTENTS
Preface .................................................................................... 1
1 Basic Safety Information .................................................................... 3
1.1 Requirement for Installation and Maintenance .............................................. 3
1.2 Symbols and Signs ....................................................................5
2 Product Characteristics ...................................................................... 7
2.1 Intended Use ........................................................................ 7
2.2 Function Description .................................................................. 8
2.3 Electrical Block Diagram .............................................................. 9
2.4 Others .............................................................................10
3 Inverter Storage .......................................................................... 11
4 Installation .............................................................................. 12
4.1 Installation Process .................................................................. 12
4.2 Checking Before Installation ...........................................................12
4.3 Tools ............................................................................. 14
4.4 Determining the Installation Position .................................................... 15
4.5 Moving of Inverter ...................................................................16
4.6 Installation ......................................................................... 17
5 Electrical Connection ...................................................................... 21
5.1 Electrical Connection ................................................................ 21
5.2 Terminal Connector .................................................................. 22
5.3 Grounding Connection (PE) ........................................................... 23
5.4 Connect Grid Side of Inverter (AC-Output) ............................................... 24
5.5 Connect PV Side Of Inverter(DC-Input）................................................ 29
5.6 Wiring method recommended .......................................................... 31
5.7 Communication Connection ........................................................... 31
5.8 Feed-in limitation connecting line .......................................................37
6 Commissioning of Inverter ..................................................................38
6.1 Cable Connection Inspection ...........................................................38
6.2 Start Inverter ....................................................................... 38
7 SOFAR monitor APP ...................................................................... 39
7.1 Software Downloads ................................................................. 39
7.2 Account registration and login ..........................................................39
7.3 Local Monitoring ....................................................................40
7.4 APP operation manual ................................................................ 42

SOFAR 100-125KTLX-G4 User Manual
8 Operation Interface ........................................................................ 43
8.1 Operation and Display Panel ........................................................... 43
8.2 Standard Interface ................................................................... 43
8.3 Main Interface ...................................................................... 45
8.4 Updating Inverter Software ............................................................ 49
9 Trouble Shooting and Maintenance ........................................................... 50
9.1 Troubleshooting ..................................................................... 50
9.2 Maintenance ........................................................................55
9.3 PID Recovery ...................................................................... 56
10 Maintenance ............................................................................ 57
10.1 Fan maintenance ................................................................... 57
10.2 Replacing a Fan .................................................................... 58
11 Technical Data .......................................................................... 60
11.1 Parameter Table ....................................................................60

SOFAR 100-125KTLX-G4 User Manual
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Preface
Notice
The products, services or features you purchased shall be subject to the company's commercial contracts and
terms. All or part of the products and services described in this document may not within the scope of your
purchase. Unless additional terms and conditions in your contract, the company does not make any statement or
guarantee on the contents of this document.
Save this Instruction
This manual must be considered as an integral part of the equipment. Customer can print the electronic version to
hard copy and keeping properly for future reference. Anyone who operates the device at any time must operate in
accordance with the requirements of this manual.
Copyright Declaration
The copyright of this manual belongs to Shenzhen SOFARSOLAR Co., Ltd. Any corporation or individual should
not plagiarize, partially cope or fully copy (including software, etc.), not allow to duplication and publishment in
any form and any way. All rights reserved, SOFARSOLAR reserves the right of final interpretation. This manual
subject to modify according to user's or customer's feedback. Please check our website at www.sofarsolar.com for
lasted version.
Document Updates
V1.3 20230908
Revised version
Outline
This manual is an integral part of SOFAR 100~125KTLX-G4. It describes the assembly, installation,
commissioning, maintenance and failure of the product. Please read it carefully before operating.
Scope of Validity
This manual contains important instructions for:
SOFAR 100KTLX-G4 SOFAR 110KTLX-G4
SOFAR 125KTLX-G4 SOFAR 125KTLX-G4-A
Target Group
This manual is for qualified electricians. The tasks described in this manual only can be performed by qualified
electricians.

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Symbols Used
The following types of safety instruction and general information appear in this document as described below:
Danger
“ Danger” indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
Warning
“Warning” indicates a hazardous situation which, if not avoided, could result in death or serious
injury
Caution
“Caution” indicates a hazardous situation which, if not avoided, could result in minor or moderate
injury
Attention
“ Attention” indicates there are potential risks, if fail to prevent, may lead to equipment cannot
normally or property damage
Note
“ Note” provides additional information and tips that are valuable for the optimal operation of the
product

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1 Basic Safety Information
Outlines of this Chapter
Please read the instruction carefully. Faulty operation may cause serious injury or death.
Note
If you have any question or problem when you read the following information, please contact
Shenzhen SOFARSOLAR CO., Ltd.
Safety Instruction
Introduce the safety instruction during installation and operation of SOFAR 100~125KTLX-G4.
Symbols Instruction
This section gives an explanation of all the symbols shown on the inverter and on the type label.
1.1 Requirement for Installation and Maintenance
Installation of SOFAR 100~125KTLX-G4 on-grid inverter must conform with laws, regulations, codes and
standards applicable in the jurisdiction.
Before installing and adjusting the produce, please read all of instructions, cautions and warnings in this
manual.
Before connecting the product to the electrical utility grid, contact the local utility company for allowance.
Also, this connection must be made only by a qualified electrician.
If the failure persists, please contact the nearest authorized maintenance center. If you don't know which
service center is closest to you, please contact your local distributor. Don't repair the product by yourself, which
may lead serious injury or damage.
Qualified Person
When inverter is working, it contains lethal voltages and went hot in some area. Improper installation or
misoperation could cause serial damage and injury. To reduce the risk of personal injury and to ensure the safe
installation and operation of the product, only a qualified electrician is allowed to execute transportation,
installation, commissioning and maintenance. Shenzhen SOFARSOLAR Co, Ltd. does not take any responsibility
for the property destruction and personal injury because of any incorrect use.
Label and Symbols
SOFAR 100~125KTLX-G4 has type label attach the side of product which contact important information and
technical data, the type label must permanent attached to the product.
SOFAR 100~125KTLX-G4 has warming symbol attached the product which contact information of safety
operation. The warming symbol must permanent attached to the product.
Installation location requirement

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Please install the inverter according to the following section. Place inverter in an appropriate bearing capacity
objects (such as solid brick wall, or strength equivalent mounting surface, etc.) and make sure inverter vertical
placed. A proper installation location must have enough space for fire engine access in order for maintenance if
faulty occur. Ensure the inverter is installed in a wall ventilated environment and have enough air cooling cycle.
Air humidity should less than 90%.
Transportation Requirement
Inverter is in the good electrical and physical condition when it ship out from factory. During
transport, inverter must be placed in its original package or other proper package. Transportation company should
responsible for any damage during transport period.
If you find any packing problems that may cause the damage of inverter or any visible damage,
please notice the responsible transportation company immediately. You can ask your installer or SOFARSOLAR
for help is necessary.
Electrical Connection
Please comply with all the current electrical regulations about accident prevention in dealing with the current
inverter.
Danger
Before the electrical connection, use opaque material to cover the PV modules or disconnect PV string
DC switch. PV arrays will produce dangerous voltage if it is exposure under sun.
Warning
All operation must accomplish by certified electrical engineer.
•Must be trained.
• Completely read the manual operation and understand all information.
Attention
Must get permission by local utility company before connecting to grid and the connection must be
done by certified electrical engineers.
Operation
Danger
Touching the utility grid or the terminal conductors can lead to lethal electric shock or fire!
Do not touch non-insulated cable ends, DC conductors and any live components of the inverter.
Attention to any electrical relevant instruction and document.
Attention
Enclosure or internal components may get hot during operation. Do not touch hot surface or wear
insulated gloves.
Keep it away from kids!

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Maintenance and repair
Danger
Before any repair work, turn OFF the AC circuit breaker between the inverter and electrical grid
first, then turn OFF the DC switch.
After turning OFF the AC circuit breaker and DC switch wait for at least 5 minutes before carry any
maintenance or repair work.
Attention
Inverter should not work again until removing all faults. If any repair work is required, please contact
local authorized service center.
Should not open the inverter cover without authorized permit, SOFARSOALR does not take any
responsibility for that.
EMC/Noise Level
Electromagnetic compatibility ( EMC) refers to that on electrical equipment functions in a given electromagnetic
environment without any trouble or error, and impose no unacceptable effect upon the environment. Therefore,
EMC represents the quality characters of an electrical equipment.
•The inherent noise-immune character: immunity to internal electrical noise
•External noise immunity: immunity to electromagnetic noise of external system
•Noise emission level: influence of electromagnetic emission upon environment
Danger
Electromagnetic radiation from inverter may be harmful to health!
Please do not continue to stay away from the inverter in less than 20cm when inverter is working
1.2 Symbols and Signs
Danger
High voltage of inverter may be harmful to health!
Only certifi ed engineer can operate the product;
Juveniles, Disable, should not use this product;
Keep this product out of the reach of children;
Caution
Caution of burn injuries due to hot enclosure!
Only touch the screen and pressing key of the inverter while it is working
Attention
PV array should be grounded in accordance to the requirements of the local electrical grid company
Warning
Ensure the maximum DC voltage input is less than the maximum inverter DC voltage (including in low
temperature condition). Any damage cause by overvoltage, SOFARSOLAR will not take the responsibility
including warranty

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Signs on the Product and on the Type Label
SOFAR 100~125KTLX-G4 has some safety symbols on the inverter. Please read and fully understand the content
of the symbols before installation.
Symbols
Name
Explanation
This is a residual voltage
in the inverter
After disconnect with the DC side, there is a residual voltage in the inverter, operator
should wait for 5 minutes to ensure the capacitor is completely discharged.
Caution of high voltage
and electric shock
The products operates at high voltages. Prior to performing any work on the product,
disconnect the product from voltage sources. All work on the product must be carried
out by qualified persons only.
Caution of hot surface
The product can get hot during operation. Avoid contact during operation. Prior to
performing any work on the product, allow the product to cool down suf f i ciently
Comply with the
Conformite Europeenne
(CE) Certification
The product comply with the CE Certif i cation
Grounding Terminal
This symbol indicates the position for the connections of an additional equipment
grounding conductor
Observe the
documentation
Read all documentation supplied with the product before install
Positive pole and
negative pole
Positive pole and negative pole of the input voltage (DC)
Temperature
Indicated the temperature allowance range
RCM logo
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the applicable Australian standards.

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2 Product Characteristics
Outlines of this Chapter
Product Dimensions
Introduce the filed of use and the dimensions of the product
Function Description
Introduce working principle and internal components
Electrical block diagram
Introduce the electrical block diagram of the product
2.1 Intended Use
SOFAR 100~125KTLX-G4 is a transformerless on grid PV inverter, that converters the direct current of the PV
array to the grid-compliant, three-phase current and feeds into the utility grid.
Figure 2-1 PV Grid-Tied System
SOFAR 100~125KTLX-G4 may only be operated with PV arrays (photovoltaic module and cabling) for on grid
condition. Do not use this product for any other or additional purposes. Any damage or property loss due to any
use of the product other than described in this section, SOFARSOLAR will not take the responsibility. DC input of
the product must be PV module, other source such like DC sources, batteries will against the warranty condition
and SOFARSOLAR will not take the responsibility.
Supported grid types

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Product Dimensions
The choice of optional parts of inverter should be made by a qualified technician who knows the installation
conditions clearly.
Dimensions Description
•SOFAR 100~125KTLX-G4
L×W×H=970*695*325mm
Labels on the equipment
Note: label must NOT be hidden with objects and extraneous parts (rags, boxes, equipment, etc.,); they must be
cleaned regularly and kept visible at all times.
Figure 2-4 Product label
2.2 Function Description
DC power generated by PV arrays is filtered through Input Board then enter Power Board. Input Board also
offer functions such as insulation impedance detection and input DC voltage/ current detection. DC power is
converted to AC power by Power Board. AC power is filtered through Output Board then AC power is fed into
the grid. Output Board also off er functions such as grid voltage/ output current detection, GFCI and output
isolation relay. Control Board provides the auxiliary power, controls the operation state of inverter and shows
the operation status by Display Board. Display Board displays fault code when inverter is abnormal operation
conditions. At the same time, Control Board can trigger the replay to protect the internal components.
Function Module
A. Energy management unit
Remote control to start/ shunt down inverter through an external control.
Figure 2- 2 Product front view and left view
Figure 2-3 Product back view and
bracket dimensions

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B. Feeding reactive power into the grid
The inverter is able to produce reactive power thus to feed it into the grid through the setting of the phase shift factor. Feed-in
management can be controlled directly by the grid company through a RS485 interface.
C. Limited the active power fed into grid
If enable the limited of active power function, inverter can limit the amount of active power fed into the grid to the desired value
(expressed as percentage).
D. Self-power reduction when grid is over frequency
If grid frequency is higher than the limited value, inverter will reduce the output power to ensure the grid stability.
E. Data transmission
Inverter or a group of inverters can be monitored remotely through an advanced communication system based on RS485 interface or
via WiFi/Ethernet.
F. Software update
USB interface for uploading the firmware, remotely uploading is available.
G. PID recovery
The PID effect can be recovered at night to protect the PV modules.
2.3 Electrical Block Diagram
SOFAR 100~125KTLX-G4 has 20 DC input strings. 10 MPPT trackers that converters the direct current of PV
array to grid-compliant, three phase current and feeds in into the utility grid. Both DC and AC side has Surge
Protection Device (SPD).
Figure 2-5Electrical block diagram

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2.4 Others
Initial short-circuit AC current is 756.7A-peak
As indicated in VDE-AR-N 4105:2018-11, section 6 Construction of the power generation system/network
and system protection (NS protection), the requirements for the network and system protection differ depending
on the maximum apparent power(SAmax∑SAmax) of the generating and storage units connected to the same
network connection point.
For installations with SAmax∑SAmax ≤ 30kVA, the NS protection can either be
A. a central NS protection at the central meter panel or decentralized in a sub-distribution; or
B. integrated NS protection
The equipment models covered by this manual are all below this limit and both of these options can be
chosen.
For installations with SAmax∑SAmax >30kVA, the NS protection must be accomplished by a central NS
protection device at the central meter panel.
In the case, taking into account the equipment covered by this User Manual, this situation will happen when
several units are connected to the same network connection point.
Note: the NS protection shall meet that a single fault shall not lead to a loss of the protective function (single fault
tolerance). The output is switched off redundant by the high power switching bridge and two relay in series. This
assures that the opening of the output circuit will also operate in case of one error. AC Relay Model HF167F-200,
830Vac/200A.
All models have been performed without an additional relay connected during VDE4105:2018 certification, to
check the internal protection of the equipment.

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3 Inverter Storage
If inverter is not installing immediately, storage condition need meet below requirements:
Place inverter into the original package and leave desiccant inside, sealed tight with taps.
Keep the storage temperature around -40℃~70℃, Relative humidity 5~95%, no condensation
Figure 3-1 Storage temperature and humidity
The maximum stacking layer number cannot exceed 4 layers.
If the inverter be storage for more than half years, the inverter needs to be fully examined and tested by
qualified service or technical personnel before using.

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4 Installation
Outlines of this Chapter
This topic describes how to install this product, please read carefully before install.
Danger
Do not install the product on fl ammable material.
Do not store this product in potentially explosive atmospheres.
Caution
The enclosure and heat sink will get hot during operation, please do not mount the product at a easy to
reach location.
Attenti
on
Consider the weight of this product when doing transport and moving. Choose an appropriate
mounting position and surface.
At least two persons for installation.
4.1 Installation Process
4.2 Checking Before Installation
Checking Outer Packing Materials
Before unpacking, please check the condition of the outer package materials if any damaged found, such as
holes, cracks, please not unpack the product, contact your distributor immediately. Recommend installing the
product within 24 hours after unpacking the package.
Checking Deliverable
After unpacking, please check according to following table, to see whether all the parts were included in the
packing, please contact your distributor immediately if anything missing or damage.

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Table 4-1 Components and mechanical parts that inside the package
①
SOFAR
100-125KTLX-G4
x1 pcs
②
Rear Panel x1 pcs
③
PV+ input connector x20pcs
④
PV- input connector x20pcs
⑤
PV+ metal pin x20pcs
⑥
PV- metal pin x20pcs
⑦
M10*90 Hexagon
screws×4pcs
⑧
M6*30 Hexagon screws x2pcs
⑨
Manual×1pcs
⑩
Warranty Card x1 pcs
⑪
Outgoing inspection report x1
pcs
⑫
Quality Certificate x1 pcs
⑬
COM 16pin connector
x1 pcs
⑭
USB collection
(WiFi)
x1 pcs

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4.3 Tools
Prepare tools required for installation and electrical connection as following table:
Table 4-2 Installation tools
1
Description: Hammer Drill Recommend
drill @ 10mm
Function: Used to drill holes on the wall
②
Description: Screwdriver
Function: Use to tighten and loosen screws
when installing AC power cable
Use to remove AC connectors from the
product
③
Description: Removal Tool
Function: Remove PV Connector
④
Description: Wire Stripper
Function: Used to peel cable
⑤
Description: With an open end of larger
than or greater than 32 mm
Function: Used to tighten expansion bolts
⑥
Description: Rubber Mallet
Function: Used to hammer expansion bolts
into holes
⑦
Description: M6
Function: M6 use to uninstall and install
the front top cover and down cover
⑧
Description: Torque wrench
Function: Connect AC connector
⑨
Description: Crimping Tool
Function: Use to crimp cable on grid side,
load side and CT extensive cable
⑩
Description: Multimeter
Function: Check grounding cable, PV
positive and negative pole
⑪
Description: Marker
Function: Mark signs
⑫
Description: Measuring Tape
Function: Measure distance
⑬
Description: Level
Function: Ensure the rear panel is properly
installed
⑭
Description: ESD gloves
Function: Installer wear when installing
product
⑮
Description: Safety goggles
Function: Installer wear when installing
product
⑯
Description: Mask
Function: Installer wear when installing
product

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4.4 Determining the Installation Position
Select a appropriate location to install the product to make sure the inverter can work in a high efficiency
condition. When selecting a location for the inverter, consider the following:
Note: Install vertical or backward tilt within 0-75°, Do not install forward or upside down!
Vertical installation Tilt back installation
Figure 4-1 Installation Position Selection
Note:
Other requirement for install position:
Install position should obstruct the disconnect of power
Place inverter in an appropriate bearing capacity objects
Location should be avoid touch by children
Figure 4-2 Clearance for single inverter

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Figure 4-3 Clearance for multiple inverters
4.5 Moving of Inverter
Manual handling
Unload the inverter from package, horizontally move to the install position. When open the package, at least two
operator insert the hands into the slots on both side of the inverter and hold the handles.
Figure 4-4 Move inverter from package
Attention
Keep the balance when lift the inverter. Required at least two operators for lifting or use forklift.
Inverter is heavy, dropped while being transported may cause injuries.
Do not put the inverter with wiring terminals contacting the floor because the power ports and signal
ports are not designed to support the weight of the inverter.
When place inverter on the floor, put it above foam or paper to avoid the damage of the shell of inverter.

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4.6 Installation
4.6.1 Installed on wall
Step 1: Placed the rear panel on the mounting wall, determine the mounting height of the bracket and mark the
mounting poles accordingly. Drilling holes by using Hammer Drill, keep the hammer drill perpendicular to the
wall and make sure the position of the holes should be suitable for the expansion bolts.
Figure 4-5 Drilling holes on the mounting wall
Step 2: Insert the expansion bolt vertically into the hole；
Figure 4-6 Screws into the holes
Step 3：Align the rear panel with the hole positions, fix the rear panels on the wall by tightening the expansion
bolt with the nuts.
Figure 4-7 Install rear panel