Sofar solar SOFAR 7KTLM-G3 User manual

Shenzhen SOFARSOLAR Co., Ltd.
Solar Grid-tied Inverter
Product Model: SOFAR 7K~10.5KTLM-G3
User manual

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
Contents
Preface.........................................................................................................................I
1. Basic safety information.................................................................................... - 1 -
1.1. Safety instructions.................................................................................- 1 -
1.2. Symbols and signs.................................................................................- 4 -
2. Product characteristics....................................................................................... - 6 -
2.1. Product dimensions............................................................................... - 6 -
2.2. Function characteristics.........................................................................- 8 -
2.3. Efficiency curve.................................................................................. - 10 -
3. Installation........................................................................................................- 11 -
3.1. Installation Process..............................................................................- 11 -
3.2. Checking Before Installation...............................................................- 11 -
3.3. Tools.................................................................................................... - 14 -
3.4. Determining the Installation Position..................................................- 15 -
3.5. Moving the SOFAR 7K~10.5KTLM-G3............................................ - 17 -
3.6. Installing SOFAR 7K~10.5KTLM-G3............................................... - 18 -
4. Electrical Connections..................................................................................... - 20 -
4.1. Outlines of this chapter....................................................................... - 20 -
4.2. Connecting PGND Cables...................................................................- 21 -
4.3. Connecting DC Input Power Cables................................................... - 23 -
4.4. Connecting AC Output Power Cables.................................................- 25 -
4.5. Com port connection........................................................................... - 30 -
4.6. WIFI/GPRS......................................................................................... - 36 -
5. Commissioning of inverter.............................................................................. - 38 -
5.1. Safety inspection before commissioning............................................ - 38 -
5.2. Start inverter........................................................................................- 38 -
6. Operation interface.......................................................................................... - 39 -
6.1. Operation and Display Panel...............................................................- 39 -
6.2. Standard Interface............................................................................... - 40 -
6.3. Main Interface..................................................................................... - 42 -
6.4. Update Software online.......................................................................- 47 -
7. Trouble shooting.............................................................................................. - 49 -
7.1. Trouble shooting..................................................................................- 49 -
7.2. Maintenance........................................................................................ - 56 -
8. Technical data.................................................................................................. - 57 -
8.1. Input parameters (DC).........................................................................- 57 -
8.2. Output parameters (AC)...................................................................... - 58 -
8.3. Efficiency,Protection and Communication......................................... - 59 -
8.4. General Date........................................................................................- 60 -
9. Quality Assurance............................................................................................ - 61 -

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
Notice
This manual contains important safety instructions that must be followed during
installation and maintenance of the equipment.
Save these instructions!
This manual must be considered as an integral part of the equipment. The manual
must always accompany the equipment, even when it is transferred to another user
or field.
Copyright Declaration
The copyright of this manual belongs to Shenzhen SOFARSOLAR Co.,Ltd. Any
corporation or individual should not plagiarize, partially copy or fully copy it
(including software, ect .), and no reproduction or distribution of it in any form or
by any means.All right reserved.
SOFARSOLAR reserves the right of final interpretation.This manual is subject to
change according to user’s or customer’s feedback. Please check our website at
http://www.sofarsolar.com for latest version.
The current Version updated at 20210719.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
I
Preface
Outline
Please read the product manual carefully before installation,operation or
maintenance. This manual contains important safety instructions and installation
instructions that must be followed during installation and maintenance of the
equipment.
Scope
This product manual describes the installation,electrical connections,
commissioning, maintenance and troubleshooting of SOFAR 7K~10.5KTLM-G3
inverters:
7KTLM-G3 7.7KTLM-G3 8KTLM-G3
9KTLM-G3 10KTLM-G3 10.5KTLM-G3
Keep this manual where it will be accessible at all times.
Target Group
This manual is intended for qualified electrical technical personnel who are
responsible for inverter installation and commissioning in the PV power system and
PV plant operator.
Symbols Used
This manual is provides safety operation information and uses the symbol in order
to ensure personal and property security and property security and use inverter
efficiently when operating the inverter. You must understand these emphasized
information to avoid the personal injury and property loss.Please read the following
symbols used in this manual carefully.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
II
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 potential risks which, if not avoided,
may lead to equipment fault or property damage.
Attention
Note provides tips that are valuable for the optimal
operation of the product.
Note

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 1 -
1. Basic safety information
If you have any question or problem when you read the following
information, please contact Shenzhen SOFARSOLAR Co., Ltd.
Note
Outlines of this chapter
Safety instruction
It mainly introduce the safety instruction when install and operate the
equipment.
Symbols and signs
It mainly introduce the safety symbols on the inverter.
1.1. Safety instructions
Read and understand the instructions of this manual, and be familiar with
relevant safety symbols in this chapter, then start to install and troubleshoot the
equipment.
According to the national and state requirements, before connecting to the
electrical grid, you must get permission from the local electrical grid operation
can only be performed by qualified electrical engineer.
Please contact the nearest authorized service center if any maintenance or repair
is needed.Contact your distributor for the information of the nearest authorized
service center. Do NOT repair it by yourself, it may cause injury or property
damage.
Before installing and maintaining the equipment, you should turn the DC switch
OFF to cut off the high voltage DC of the PV array. You can also turn the switch
in the PV combiner box OFF to cut off the high voltage DC. Otherwise, serious
injury may be caused.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 2 -
Qualified persons
The customer must make sure the operator has the necessary skill and training to
do his/her job.Staff in charge of using and maintaining the equipment must be
skilled,aware and mature for the described tasks and must have the reliability to
correctly interpret what is described in the manual. For safety reason only a
qualified electrician, who has received training and / or has demonstrated skills
and knowledge in construction and in operation of this unit, can install this
inverter. Shenzhen SOFARSOLAR Co., Ltd does not take any responsibility for
the property destruction and personal injury because of any incorrect use.
Installation requirements
Please install inverter according to the following section. Fix the inverter on an
appropriate objects with enough load bearing capacity (such as walls, PV racks
etc.), and ensure that inverter is vertical placed. Choose a place suitable for
installing electrical devices. And assure there is enough fire exit space,
convenient for maintenance. Maintain proper ventilation to ensure enough air
cycle to cool the inverter.
Transport requirements
If you find packing problems that may cause the damage of the inverter, or find
any visible damage, please immediately notice the responsible transportation
company. You can ask solar equipment installation contractor or Shenzhen
SOFARSOLAR Co.Ltd for help if necessary.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 3 -
Transport of the equipment, especially by road, must be carried out with by
suitable ways and means for protecting the components (in particular, the
electronic components) from violent shocks, humidity, vibration, etc.
Electric connection
Please comply with all the current electrical regulations about accident
prevention in dealing with the solar invert.
Before the electrical connection, make sure to use opaque material
to cover the PV modules or to disconnect PV array DC switch.
Exposure to the sun, PV array will produce a dangerous voltage!
Danger
All installation accomplished only by professional electrical
engineer!
Must be trained;
Completely read the manual operation and understand relevant
matter.
Warning
Get permission from the local electrical gird operator, complete all
electrical connections by professional electrical engineer, then
connect inverter to electrical grid.
Attention
It’s forbidden to remove the tamper evident label, or open the
inverter. Otherwise Sofarsolar will not provide warranty or
maintenance!
Note
Operation
Touching the electrical grid or the terminal of the equipment may
lead to electrocution or fire!
Don’t touch the terminal or conductor connected to the electrical
grid.
Pay attention to any instructions or safety documents related to grid
connection.
Danger
Some internal components will be very hot when inverter is
working. Please wear protective gloves!
Keep it away from kids !
Attention

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 4 -
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 5
minutes at least before carrying out any maintenance or repair work.
Danger
Inverter should work again after removing any faults. If you need
any repair work, please contact with the local authorized service
center.
Can’t open the internal components of inverter without authorized.
Shenzhen SOFARSOLAR Co., Ltd. does not take any responsibility
for the losses from that.
Attention
EMC / noise level of inverter
Electromagnetic compatibility (EMC) refers to that one 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 around the inverter in less than 20 cm
when inverter is working.
Danger
1.2. Symbols and signs
Caution of burn injuries due to hot enclosure!
You can only touch the screen and pressing key of the inverter while
it’s working.
Caution
PV array should be grounded in accordance to the requirements of
the local electrical grid operator!
We suggest that all PV module frames and inverter are reliably
grounded to protect the PV system and personnel security.
Attention
Ensure input DC voltage < Max. DC voltage .Over voltage may
cause permanent damage to inverter or other losses, which will not
be included in warranty!
Warning

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 5 -
Signs on the inverter
There are some symbols which are related to security on the inverter. Please read
and understand the content of the symbols, and then start the installation.
There is a residual voltage in the inverter! Before opening the
equipment, operator should wait for five minutes to ensure the
capacitor is discharged completely.
Caution, risk of electric shock.
Caution hot surface.
Comply with the Conformite Europeenne (CE) certification.
Grounding point.
Please read this manual before install SOFAR 7K~10.5KTLM-G3.
This indicates the degree of protection of the equipment according
to IEC standard 70-1 (EN 60529 June 1997).
Positive pole and negative pole of the input voltage (DC).
RCM (Regulatory Compliance Mark)
The product complies with the requirements of the applicable
Australian standards.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 6 -
2. Product characteristics
Outlines of this chapter
Product dimensions
It introduces the field of use, and the overall dimensions of SOFAR
7K~10.5KTLM-G3 inverters.
Function description
It introduces how SOFAR 7K~10.5KTLM-G3 inverters work and the function
modules inside.
Efficiency curves
It introduces the efficiency curves of in the inverter.
2.1. Product dimensions
SOFAR 7K~10.5KTLM-G3 is a dual MPPT grid-tied PV inverter which
converts the DC power generated by PV arrays into sine wave single-phase AC
power and feeds it to the public electrical grid, AC circuit breaker (refer to
Section 4.4) and DC switch used as disconnect device, and the disconnect device
shall be easily accessible.
Figure2-1 PV Grid-tied System

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 7 -
SOFAR 7K~10.5KTLM-G3 inverters can only be used with photovoltaic
modules that do not require one of the poles to be grounded. The operating
current during normal operation must not exceed the limits specified in the
technical specifications. Only the photovoltaic modules can be connected to the
input of the inverter (do not connect batteries or other sources of power supply).
The choice of optional parts of inverter should be made by a qualified technician
who knows the installation conditions clearly.
Overall dimensions:L×W×H=468mm×380mm×187mm
Figure 2-2 Front view and left view dimensions of SOFAR 7K~10.5KTLM-G3

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 8 -
Figure 2-3 Bracket dimensions of SOFAR 7K~10.5KTL-G3
Labels on the equipment
2.2. Function characteristics
DC power generated by PV array is filtered through Input Board before entering
The labels must NOT be hidden with objects and
extraneous parts (rags,boxes,equipment,etc.);they must
be cleaned regularly and kept visible at all times.

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 9 -
into 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 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 in abnormal operation conditions. At the same time, Control Board
can trigger the relay so as to protect the internal components.
Function module
A. Energy management unit
This control can be used to switch the inverter on/off through an external
(remote) control.
B. Feeding reactive power into the grid
The inverter is able to produce reactive power and can therefore 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 dedicated RS485 serial
interface.
C. Limiting the active power fed into the grid
The inverter, if enabled can limit the amount of active power fed into the grid by
the inverter to the desired value (Expressed as a percentage).
D. Self power reduction when grid is over frequency
When the grid frequency is higher than the limited value, inverter will reduce
output power which is necessary for the grid stability.
E. Data transmission
The inverter or a group of inverters may be monitored remotely through an
advanced communication system based on RS-485 serial interface, or remotely
via the WIFI/GPRS.
F. Software update
Support usb flash drive local upgrade software and WIFI/GPRS remote upgrade

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 10 -
software.
Electrical block diagram
Figure2-4 Electrical block diagram
2.3. Efficiency curve

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 11 -
3. Installation
Outlines of this chapter
This topic describes how to install the SOFAR 7K~10.5KTLM-G3 .
Installation notes
3.1. Installation Process
Figure 3-1 Installation flowchart
3.2. Checking Before Installation
Checking Outer Packing Materials
Packing materials and components may be damaged during transportation.
Do NOT install the SOFAR 7K~10.5KTLM-G3 on flammable
material.
Do NOT install the SOFAR 7K~10.5KTLM-G3 in an area used to
store Flammable or explosive material.
Danger
The enclosure and heat sink are very hot while the inverter is
working, therefore do NOT install the SOFAR 7K~10.5KTLM-G3 in
places where you might touch them inadvertently.
Caution
Consider the weight of SOFAR 7K~10.5KTLM-G3 when
transporting and moving the inverters.
Choose an appropriate mounting position and surface.
Assign at least two persons to install the inverter.
Attention
Start
Check before
installation
Prepare installation
tools
Determine
installation location
Moving the
inverter
Install the rear
panel
Install the
inverter
End

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 12 -
Therefore, check the outer packing materials before installing the inverter.
Check the outer packing materials for damage, such as holes and cracks. If any
damage is found, do not unpack the SOFAR 7K~10.5KTLM-G3 and contact the
dealer as soon as possible. You are advised to remove the packing materials
within 24 hours before installing the SOFAR 7K~10.5KTLM-G3 inverter.
Checking Deliverables
After unpacking the inverter, check whether deliverables are intact and complete.
If any damage is found or any component is missing, contact the dealer.
Table3-1 Shows the components and mechanical parts that should be delivered.
NO.
Picture
Description
Quantity
1
7K~10.5KTLM-G3
1pcs
2
Rear panel
1pcs
3
PV+ input terminal
3pcs
4
PV- input terminal
3pcs
5
Metal terminals secured to
PV+ input power cables
3pcs

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 13 -
6
Metal terminals secured to
PV- input power cables
3pcs
7
COM 8pin Communication
Terminal
1pcs
8
USB acquisition stick
(WIFI/GPRS/Ethernet)
1pcs
(Optional)
9
AC Buckler
1pcs
10
M6 Hexagon screws
3pcs
11
M4*12 cross screw
4pcs
12
M6*80 anchoring
3pcs
13
TO Terminal
3pcs

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 14 -
14
Manual
1pcs
15
The warranty card
1pcs
16
Registration Form
1pcs
3.3. Tools
Prepare tools required for installation and electrical connections.
Table 3-2 Shows the tools required for installation and electrical connections.
NO.
Tool
Model
Function
1
Hammer drill
Recommend drill
dia. 6mm
Used to drill holes on the wall.
2
Screwdriver
Wiring
3
Cross screwdriver
Remove and install AC terminal
screws
4
Removal tool
Remove PV terminal
5
Wire stripper
Strip wire

SOFAR 7K~10.5KTLM-G3 User manual
Copyright © Shenzhen SOFAR SOLAR Co., Ltd
- 15 -
6
5mm Allen
Wrench
Turn the screw to connect rear
panel with inverter.
7
Crimping tool
Used to crimp power cables
8
Multi-meter
Used to check grounding
9
Marker
Used to mark signs
10
Measuring tape
Used to measure distances
11
Level
Used to ensure that the rear panel
is properly installed
12
ESD gloves
Operators wear
13
Safety goggles
Operators wear
14
Anti-dust respirator
Operators wear
3.4. Determining the Installation Position
Determine an appropriate position for installing the SOFAR 7K~10.5KTLM-G3
inverter. Comply with the following requirements when determining the
installation position: