Sofar 125KTLX-G4 User manual

SOFAR 100...125KTLX-G4(ESS)
Shenzhen SOFARSOLAR Co.,Ltd.
USER
MANUAL

Shenzhen SOFARSOLAR Co., Ltd.
11/F, Gaoxinqi Technology Building,
District 67, XingDong Community, XinAn Street,
Bao’An District, Shenzhen, China
SOFARSOLAR GmbH
Krämerstrasse 20
72764 Reutlingen
Germany
Email: [e-mail]
[e-mail]
Web: www.sofarsolar.com
Document number
Version 01 / 12.2023
English

Content
1 Basic Safety Information .......................... 8
1.1 Requirement for Installation and Maintenance................8
1.2 Symbols and Signs ........................................ 11
2 Product Characteristics ..........................13
2.1 Intended Use.............................................. 13
2.2 Function Description ...................................... 15
2.3 Electrical Block Diagram ................................... 16
2.4 Others .................................................... 16
3 Inverter Storage .................................18
4 Installation......................................19
4.1 Installation Process ........................................ 20
4.2 Checking Before Installation ............................... 20
4.3 Tools...................................................... 21
4.4 Determining the Installation Position ....................... 22
4.5 Moving of Inverter ......................................... 23
4.6 Installation ................................................ 25
5 Electrical Connections ...........................29
5.1 Electrical Connection ...................................... 30
5.2 Terminal Connector........................................ 30
5.3 Grounding Connection (PE) ................................ 31
5.4 Connect Grid Side of Inverter (AC-Output) .................. 33
5.5 Connect PV Side Of Inverter(DC-Input) ...................... 40
5.6 Wiring method recommended ............................. 43
5.7 Networking Methods ...................................... 44
5.8 Communication Connection ............................... 47
5.9 Feed-in limitation connecting line .......................... 54
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6 Commissioning of Inverter .......................55
6.1 Cable Connection Inspection............................... 55
6.2 Start Inverter .............................................. 55
7 SOFAR monitor APP .............................57
7.1 Software Downloads....................................... 57
7.2 Account registration and login ............................. 58
7.3 Local Monitoring .......................................... 60
7.4 EMS set up ................................................ 64
7.5 Firmware upgrade ......................................... 66
7.6 APP operation manual..................................... 68
8 Operation Interface ..............................70
8.1 Operation and Display Panel ............................... 70
8.2 Standard Interface......................................... 71
8.3 Main Interface ............................................. 72
8.4 Updating Inverter Software ................................ 77
9 Trouble Shooting and Maintenance ..............79
9.1 Troubleshooting ........................................... 79
9.2 PID Recovery .............................................. 90
10 Maintenance ....................................92
10.1 Fan maintenance .......................................... 92
10.2 Replacing a Fan ........................................... 94
11 Technical Data ..................................96
11.1 Parameter Table........................................... 96

Preface
Notice
The products, services or features you purchased shall be subject to the com-
pany’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. Cus-
tomer 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. Read and observe all given
safety information.
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 fi nal
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 20231031
Revised version
Outline
This manual is an integral part of SOFAR 100...125KTLX-G4(ESS). 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(ESS)；SOFAR 110KTLX-G4(ESS)；SOFAR 125KTLX-G4(ESS)
；SOFAR 125KTLX-G4-A(ESS)
Installation and User Manual 5/97

Target Group
This manual is for qualifi ed electricians. The tasks described in this manual only
can be performed by qualifi ed electricians.
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 re-
sult 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.
NOTICE
−“Note” provides additional information and tips that are valuable for the
optimal operation of the product.
6/97 SOFAR 100...125KTLX-G4(ESS)

1 Basic Safety Information
Outlines of this Chapter
Please read the instruction carefully. Faulty operation may cause serious injury
or death.
NOTICE
If you have any question or problem when you read the fol-
lowing information, please contact Shenzhen SOFARSOLAR
CO., Ltd.
Safety Instruction
Introduce the safety instruction during installation and operation of SOFAR
100...125KTLX-G4(ESS).
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(ESS) 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, cau-
tions 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
qualifi ed electrician.
If the failure persists, please contact the nearest authorized maintenance cen-
ter. 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.
Prior to installing and maintaining the equipment, a DC switch should be
utilized to disconnect the high voltage DC from the PV array; otherwise, the
resulting high voltage may cause serious injury.
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Basic Safety Information

Qualifi ed 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 qualifi ed 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(ESS) 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(ESS) has warming symbol attached the product
which contact information of safety operation. The warming symbol must
permanent attached to the product.
Installation location requirement
Please install the inverter according to the following section. Place inverter in
an appropriate bearing capacity object (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 fi re engine access 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 fi nd 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 if necessary.
Electrical Connection
Please comply with all the current electrical regulations about accident
prevention in dealing with the current inverter.
8/97 SOFAR 100...125KTLX-G4(ESS)
Basic Safety Information

DANGER
−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
WARNING
All operation must accomplish by certifi ed 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 fi re!
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 opera-
tion. Do not touch hot surface or wear insulated gloves.
Keep it away from kids!
Maintenance and repair
DANGER
Before any repair work, turn OFF the AC circuit breaker
between the inverter and electrical grid fi rst, 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.
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Basic Safety Information

ATTENTION
Inverter should not work again until removing all faults. If any repair
work is required, please contact local authorized service centre.
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;infl uence of electromagnetic emission upon environ-
ment.
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;
CAUTION
Caution of burn injuries due to hot enclosure(Enclosure sur-
face temperature limit up to 100°C)!
Only touch the screen and pressing key of the inverter while
it is working.
ATTENTION
PV array should be grounded in accordance to the require-
ments 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.
10/97 SOFAR 100...125KTLX-G4(ESS)
Basic Safety Information

Signs on the Product and on the Type Label
SOFAR 100...125KTLX-G4(ESS) has some safety symbols on the inverter. Please
read and fully understand the content of the symbols before installation.
Symbol Description
After disconnect with the DC side, there is a residual voltage in
the inverter, operator should wait for 25 minutes to ensure the
capacitor is completely discharged.
Caution! Danger through electric shock
Caution! Hot surface
The product is compliant with EU guidelines
Earthing point
Read the manual before installing the inverter
Positive and negative poles of the DC input voltage
The temperature range in which the inverter can operate
RCM (Regulatory Compliance Mark)
The product meets the requirements of the applicable Austra-
lian standards.
Installation and User Manual 11/97
Basic Safety Information

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(ESS) 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.
12/97 SOFAR 100...125KTLX-G4(ESS)
Product Characteristics

SOFAR 100...125KTLX-G4(ESS) may only be operated with PV arrays (photovol-
taic 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 SOFAR-
SOLAR will not take the responsibility.
Supported grid types
Installation and User Manual 13/97
Product Characteristics

Product Dimensions
The choice of optional parts of inverter should be made by a qualifi ed techni-
cian who knows the installation conditions clearly.
Dimensions Description
• SOFAR 100...125KTLX-G4(ESS)
L×W×H=970×695×325mm
Labels on the equipment
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.
14/97 SOFAR 100...125KTLX-G4(ESS)
Product Characteristics

2.2 Function Description
DC power generated by PV arrays is fi ltered 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 fi ltered through Output Board then AC
power is fed into the grid. Output Board also offer functions such as grid volt-
age/ 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 percent-
age).
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 ad-
vanced communication system based on RS485 interface or PBUS commu-
nication.
F. Software update
USB interface for uploading the fi rmware, 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(ESS) 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).
Installation and User Manual 15/97
Product Characteristics

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 net-
work connection point.
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 certifi cation, to check the internal protection of the equipment.
16/97 SOFAR 100...125KTLX-G4(ESS)
Product Characteristics

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.
• Donottiltorinvertthebox.
• Store in a clean and dry place and protect from dust and moisture. Do not
subject to rain or ground water erosion.
• Whenstacking,placetheinvertercarefullytoavoidpersonalinjuryorequip-
mentdamagecausedbytippingtheequipment.
• Keep the storage temperature around -40°C~70°C. Relative humidity 5~95%,
no condensation.
• 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 qualifi ed service or technical personnel before
using.
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Inverter Storage

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 flammable 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.
ATTENTION
−Consider the weight of this product when doing transport and moving.
−Choose an appropriate mounting position and surface.
−At least four persons for installation.
18/97 SOFAR 100...125KTLX-G4(ESS)
Installation

4.1 Installation Process
4.2 Checking Before Installation
Checking the external packaging 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 with-
in 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 imme-
diately if anything missing or damage.
Table 4-1Components and mechanical parts that inside the package
Image Qty Description Image Qty Description
1 SOFAR
100...125KTL-
G4(ESS)
series
1 Rear Panel
20 PV+ input con-
nector
20 PV- input con-
nector
20 PV+ metal pin 20 PV- metal pin
Installation and User Manual 19/97
Installation

Image Qty Description Image Qty Description
4 M10*90 Hexa-
gon screws
2 M6*30 Hexa-
gon screws
3 Documents 1 Warranty Card
1 COM 16pin
connector
1 USB collection
(Wi-Fi)
4.3 Installation tools
Installation tools include, but are not limited to, those recommended below.
Other auxiliary tools may be used in the fi eld if necessary.Prepare tools re-
quired for installation and electrical connection as following table:
Table 4-2 Installation tools
Hammer drill Screwdriver
Removal tool Wire stripper
Crescent wrench Hammer
M6 Allen key Socket wrench
20/97 SOFAR 100...125KTLX-G4(ESS)
Installation