Sofar solar SOFAR 75KTL User manual

Shenzhen SOFAR SOLAR Co., Ltd.
Solar Grid-tied Inverter
Product Model: SOFAR 75K~136KTL
User manual

75-136KTL User Manual
All copy reserved ©Shenzhen SOFARSOLAR Co., Ltd.
I
Preface...........................................................................................................................................................II
1. Basic Safety Information...................................................................................................................... - 1 -
1.1. Requirement for Installation and Maintenance......................................................-1-
1.2. Symbols and signs..................................................................................................- 4 -
2. Product Characteristics......................................................................................................................... - 7 -
2.1. Intended Use.......................................................................................................... -7-
2.2. Function Description............................................................................................- 10 -
2.3. Electrical block diagram...................................................................................... - 12 -
2.4. Efficiency and derating curve.............................................................................. - 13 -
2.5. Others...................................................................................................................- 14 -
3. Inverter Storage.................................................................................................................................. - 16 -
4. Installation.......................................................................................................................................... - 17 -
4.1. Installation Process.............................................................................................. - 17 -
4.2. Checking Before Installation............................................................................... - 17 -
4.3. Tools.....................................................................................................................- 19 -
4.4. Determining the Installation Position.................................................................. - 22 -
4.5. Moving of inverter............................................................................................... - 25 -
4.6. Installation............................................................................................................- 27 -
5. Electrical Connection......................................................................................................................... - 32 -
5.1. Electrical Connection...........................................................................................- 33 -
5.2. Terminal Connector..............................................................................................- 33 -
5.3. Grounding Connection (PE)................................................................................ - 34 -
5.4. Connect grid side of inverter(AC-Output)...........................................................- 35 -
5.5. Connect PV side of inverter（DC-Input）..........................................................- 41 -
5.6. Communication Connection................................................................................ - 44 -
6. Commissioning of inverter................................................................................................................. - 50 -
6.1. Cable Connection Inspection............................................................................... - 50 -
6.2. Start Inverter........................................................................................................ - 50 -
7. Operation interface............................................................................................................................. - 52 -
7.1. Operation and Display Panel............................................................................... - 52 -
7.2. Standard Interface................................................................................................ - 53 -
7.3. Main Interface......................................................................................................- 56 -
7.4. Updating Inverter Software..................................................................................- 59 -
8. Trouble shooting and maintenance.....................................................................................................- 61 -
8.1. Troubleshooting................................................................................................... - 61 -
8.2. Maintenance.........................................................................................................- 67 -
8.3. Anti-PID...............................................................................................................- 68 -
9. Technical Data.................................................................................................................................... - 70 -
9.1. Input parameters (DC)......................................................................................... - 70 -
9.2. Output Parameter (AC)........................................................................................ - 71 -
9.3. Performance Parameter........................................................................................ - 72 -
9.4. General Data........................................................................................................ - 73 -
10. Quality Assurance.............................................................................................................................- 74 -

75-136KTL User Manual
All copy reserved ©Shenzhen SOFARSOLAR Co., Ltd.
II
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 http://www.sofarsolar.com for lasted version.
The current Version updated at 20220124
Shenzhen SOFARSOLAR Co., Ltd
Location:11/F., Gaoxinqi Technology Building, No.67 Area, Xingdong Commu
nity, Xin’an Sub-district, Bao’an District, Shenzhen City,China
Postcode: 518000
Company Website: www.sofarsolar.com
Email: [e-mail]

75-136KTL User Manual
All copy reserved ©Shenzhen SOFARSOLAR Co., Ltd.
III
Outline
This manual is an integral part of SOFARSOLAR 75KTL to 136KTL. 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 75KTL
SOFAR 80KTL
SOFAR 100KTL
SOFAR 110KTL
SOFAR 100KTL-HV
SOFAR 125KTL-HV
SOFAR 136KTL-HV
Target Group
This manual is for qualified electricians. The tasks described in this manual only
can be performed by qualified electricians.
Symbols Used
The following types of safety instruction and general information appear in this
document as described below:
“Danger”indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
Danger
“Warning”indicates a hazardous situation which, if not
avoided, could result in death or serious injury
Warning
“Caution”indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury
Caution
“Attention”indicates there are potential risks, if fail to
prevent, may lead to equipment cannot normally or property
damage.
Attention
“Note”provides additional information and tips that are
valuable for the optimal operation of the product.
Note

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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
75~136KTL
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 75-136KTL 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 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.
If you have any question or problem when you read the
following information, please contact Shenzhen
SOFARSOLAR CO., Ltd.
Note

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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 75~136KTL 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 75~136KTL has warming symbol attache 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 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%.

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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
dangerous voltage if it is exposure under sun.
Danger
All operation must accomplish by certified electrical engineer
Must be trained;
Completely read the manual operation and understand all
information.
Warming
Must get permission by local utility company before connecting to
grid and the connection must be done by certified electrical
engineers.
Attention
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
components of the inverter.
Attention to any electrical relevant instruction and document.
Danger
Enclosure or internal components may get hot during operation. Do
not touch hot surface or wear insulated gloves.
Keep it away from kids!
Attention

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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.
Danger
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.
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 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
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
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;
Danger
Caution of burn injuries due to hot enclosure!
Only touch the screen and pressing key of the inverter while it is
working
Caution

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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 75~136KTL 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 sufficiently
Comply with the Conformite
Euroeenne (CE)
Certification
The product comply with the CE
Certification
Grounding Terminal
This symbol indicates the position for
the connections of an additional
equipment grounding conductor

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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
Efficiency Curves
Introduce the efficiency curves of the product
2.1. Intended Use
SOFAR 75~136KTL 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.
Figures 2-1PV Grid-Tied System
SOFAR 75~136KTL 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.

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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 75~136KTL
L×W×H=995.5*663.5*368mm
Figure 2-2 Product front view and left view dimensions

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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

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Board. AC power is filtered through 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 Wi-Fi/GPRS/Ethernet.
F. Software update
USB interface for uploading the firmware, remotely uploading is available.
G. Anti-PID （optional function）
The PID effect can be recovered at night to protect the PV modules.

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2.3. Electrical block diagram
SOFAR 75~136KTL has 16-24 DC input strings. 8-12 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 2-4 Schematic diaram
For SOFAR 75KTL/SOFAR 80KTL/SOFAR 100KTL/SOFAR 110KTL

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Figure 2-5 Schematic diaram (without N line)
For SOFAR 100KTL-HV SOFAR 125KTL-HV SOFAR 136KTL-HV
2.4. Efficiency and derating curve

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2.5. Others
● Initial short-circuit AC current is 756.7A-peak

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●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 central NS protection at the central meter panel or decentralized in a
sub-distribution; or
■ 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 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