Sofar 100KTLX-G4 User manual

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USER MANUAL
Shenzhen SOFARSOLAR Co.,Ltd.
SOFAR 100~125KTLX-G4

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Preface
Basic Safety Information
Product Characteristics
2.1 Intended Use
2.2 Function Description
2.3 Electrical Block Diagram
2.4 Others
1.1 Requirement for Installation and Maintenance
1.2 Symbols and Signs
Inverter Storage
Installation
4.1 Installation Process
4.2 Checking Before Installation
4.3 Tools
4.4 Determining the Installation Position
4.5 Moving of Inverter
4.6 Installation
01
02
03
04
CONTENTS
13
13
13
15
16
17
18
12
03
03
06
01
08
08
09
10
11

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Operation interface
Electrical Connection
5.1 Electrical Connection
5.2 Terminal Connector
5.3 Grounding Connection (PE)
5.4 Connect Grid Side of Inverter(AC-Output)
5.5 Connect PV Side of Inverter(DC-Input）
5.6 Communication Connection
Commissioning of inverter
6.1 Cable Connection Inspection
6.2 Start Inverter
Trouble shooting and maintenance
8.1 Troubleshooting
8.2 Maintenance
8.3 PID Recovery
9.1 Parameter Table
Technical Data
05
06
7.1 Operation and Display Panel
7.2 Standard Interface
7.3 Main Interface
7.4 Updating Inverter Software
07
08
09
Quality Assurance
10
22
23
23
24
25
29
31
36
36
36
37
37
37
39
43
44
44
50
51
52
52
54

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
V1.0 20230207
Initial version
Target Group
This manual is for qualified electricians. The tasks described in this manual only can be performed
Outline
This manual is an integral part of SOFAR 100~125KTLX-G4. It describes the assembly, installation,
Scope of Validity
This manual contains important instructions for:SOFAR 100KTLX-G4;SOFAR 110KTLX-G4;
SOFAR 125KTLX-G4;SOFAR 125KTLX-G4-A.
commissioning ,maintenance and failure of the product. Please read it carefully before operating
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
Warning
Caution
Attention
Note
“Danger”indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
“Warning”indicates a hazardous situation which, if not avoided,could
result in death or serious injury
“Caution”indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury
“Attention”indicates there are potential risks, if fail to prevent, may lead
to equipment cannot normally or property damage
“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.
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
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 attache the product which contact information of
safety operation. The warming symbol must permanent attached to the product.
Note
If you have any question or problem when you read the following informa-
tion, please contact Shenzhen SOFARSOLAR CO., Ltd.
•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 warn-
ings 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 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.
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Installation location requirement
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.
Before the electrical connection, use opaque material to cover the PV
modules or disconnect PV string DC switch. PV arrays will produce danger-
ous voltage if it is exposure under sun.
All operation must accomplish by certified electrical engineer
• Must be trained;
• Completely read the manual operation and understand all information.
Must get permission by local utility company before connecting to grid and
the connection must be done by certified electrical engineers.
Danger
Warning
Attention
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Operation
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 compo-
nents of the inverter.
Attention to any electrical relevant instruction and document.
Enclosure or internal components may get hot during operation. Do not
touch hot surface or wear insulated gloves.
Keep it away from kids!
Danger
Attention
Maintenance and repair
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.
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.
Danger
Attention
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 equip-
ment.
• 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
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
Danger
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1.2 Symbols and signs
High voltage of inverter may be harmful to health!
Only certified engineer can operate the product;
Juveniles, Disable, should not use this product;
Keep this product out of the reach of children;
Caution of burn injuries due to hot enclosure!
Only touch the screen and pressing key of the inverter while it is working
Danger
Caution
PV array should be grounded in accordance to the requirements of the local
electrical grid company
Attention
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
Warning
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
5min
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.
This is a residual
voltage in the
inverter
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 high
voltage and
electric shock
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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 sufficiently
Caution of hot
surface
The product comply with the CE Certification
This symbol indicates the position for the connections of
Comply with the
Conformite
Europeenne (CE )
Certification
an additional equipment grounding conductor
Read all documentation supplied with the product before
install
Grounding
Terminal
Observe the
documentation
Positive pole and negative pole of the input voltage (DC)
Positive pole and
negative pole
Indicated the temperature allowance range
Temperature
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the
applicable Australian standards.
RCM logo
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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.
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.
Figure 2-1 PV Grid-Tied System
Product Dimensions
The choice of optional parts of inverter should be made by a qualified technician who knows the
installation conditions clearly.
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Grid Cloud

Dimensions Description
• SOFAR 100~125KTLX-G4
L×W×H=970*695*325mm
Figure 2-2 Product front view and left view dimensions Figure 2-3 Product back view and
bracket dimensions
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
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Output Board then AC power is fed into the grid. Output Board also offer 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.
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 2-5 Electrical block diagram
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PV1+
直流开关 继电器
PV1-
PV10+
PV10-
SPD
DC/AC
R
S
T
N
PE
SPD
交流
滤波
直流
滤波
MPPT 10
MPPT 1
交流
滤波
PV1+
PE
PV1-
PV10+
PV10-
SPD
DC/AC
R
S
T
N
PE
SPD
DC
Filter
MPPT 10
MPPT 1

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 0～95%, no conden-
sation
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
Caution
Attention
Do not install the product on flammable material.
Do not store this product in potentially explosive atmospheres.
The enclosure and heat sink will get hot during operation, please do not
mount the product at a easy to reach location.
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
Start check before
installation
prepare installation
tools
determine the
installation position
End install the rear panel moving the Inver
install the Inver
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 immediate-
ly. 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
SOFAR
100~125KTLX-G4
×1pcs
Rear Panel×1pcs
PV- input connector
×20pcs
PV- metal pin
×20pcs
M6*30 Hexagon
screws×2pcs
Warranty Card×1pcs
Quality Certificate
×1pcs
USB collection
(WiFi / Ethernet)）
×1pcs
PV+ input connector
×20 pcs
PV+ metal pin
×20pcs
M10*90
Hexagon
screws×4pcs
Manual×1pcs
COM 16pin connector
Outgoing inspection
report×1pcs
×1pcs
①
③
⑤
⑦
⑨
⑪
⑬
②
④
⑥
⑧
⑩
⑫
⑭
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4.3 Tools
Prepare tools required for installation and electrical connection as following table:
Table 4-2 Installation tools
Description: Hammer Drill Recommend
drill @ 10mm
Function: Used to drill holes on the wall
Description: Removal Tool
Function: Remove PV Connector
Description: Wire Stripper
Function: Used to peel cable
Description: With an open end of larger
than or greater than 32 mm
Function:
Used to tighten expansion bolts
Description: M6
Function:M6 use to uninstall and install
the front top cover and down cover
Description: Crimping Tool
Function:Use to crimp cable on grid side,
load side and CT extensive cable
Description: Multimeter
Function:
Check grounding cable, PV positive and
negative pole
Description: Level
Function: Ensure the rear panel is
properly installed
Description: ESD gloves
Function: Installer wear when installing
product
Description: Safety goggles
Function: Installer wear when installing
product
Description: Marker
Function: Mark signs
Description: Measuring Tape
Function: Measure distance
Description: Screwdriver
Function: Use to tighten and loosen
screws when installing AC power cable
Use to remove AC connectors from the
product
Description: Rubber Mallet
Function: Used to hammer expansion
bolts into holes
①
③
⑤
⑦
⑨
⑪
⑬
⑮ ⑯
②
④
⑥
⑧
⑩
⑫
⑭
Description: Torque wrench
Function: Connect AC connector
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Description: Mask
Function: Installer wear when installing
product

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!
说明:
关于安装位置选择还有下面要求:
Figure 4-2 Clearance for single inverter
Figure 4-1 Installation Position Selection
0~75°
Tilt back installationVertical installation
• Install position should obstruct the disconnect of power
• Place inverter in an appropriate bearing capacity objects
• Location should be avoid touch by children
Note:
Other requirement for install position:
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≥50cm
≥60cm
≥80cm
≥60cm

≥600mm
≥300mm
≥800mm
≥1000mm
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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