Sofar 100KTLX-G4 User manual

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

Shenzhen SOFARSOLAR Co., Ltd.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: [email protected]
Web: www.sofarsolar.com
Document number
Issue 01 | 05.2023
English

ContentContent
1 About this Manual ................................6
1.1 Copyright declaration ....................................... 6
1.2 Presentation of warnings .................................... 6
1.3 Presentation of action instructions ............................. 8
1.4 Note ....................................................8
2 General Safety Information .........................9
2.1 Intended use............................................. 10
2.2 Target group............................................. 10
2.3 Quali󰘰edpersonnel ....................................... 10
2.4 Installation requirements ................................... 11
2.5 Transport requirements .................................... 11
2.6 Labelling on the device..................................... 11
2.7 Electrical connection ...................................... 11
2.8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9 Repair and maintenance ................................... 12
2.10 Warranty................................................ 12
3 About the Product ...............................13
3.1 Overview ............................................... 13
3.2 Dimensions.............................................. 13
3.3 Symbols and signs on the inverter ............................ 14
3.4 Power grid types.......................................... 15
3.5 Functional features........................................ 15
3.6 Electrical block diagram .................................... 17
3.7 PID Recovery ............................................ 17
Installation and User Manual 3/78

4 Installation .....................................18
4.1 Before installation......................................... 19
4.2 Installation tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3 Selecting an installation location ............................. 22
4.4 Installing the inverter ...................................... 24
5 Electrical Connections ............................28
5.1 Terminal connector........................................ 29
5.2 Connect grounding PE cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.3 Connect grid side of inverter (AC-Output) ...................... 31
5.4 Connect PV side of inverter (DC-Input) ........................ 36
6 Communication Connection........................39
6.1 USB port................................................ 39
6.2 COM port ............................................... 40
7 Commissioning .................................47
7.1 Starting the inverter ....................................... 47
7.2 Initial Setup.............................................. 47
7.3 Smartphone app SOFAR setting ............................. 48
8 Operation ......................................49
8.1 Control panel and display................................... 49
8.2 Standard display.......................................... 50
8.3 Status display............................................ 50
8.4 Menu structure ........................................... 51
8.5 Software update .......................................... 54
9 Troubleshooting .................................55
9.1 Ground fault alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.2 Event list................................................ 56
10 Maintenance ...................................66
10.1 Cleaning the inverter ...................................... 66
10.2 Cleaning the heat sink ..................................... 66
10.3 Fan maintenance and replacing a fan ......................... 66

11 Technical Data ..................................69
11.1 E󰘲ciencyCurves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
11.2 Characteristics curves ..................................... 72
12 Declaration of Conformity .........................76
Installation and User Manual 5/78

11 About this ManualAbout this Manual
This Installation and user manual (hereinafter referred to as the manual) describes the
installation, electrical connection, commissioning, maintenance and fault elimination
procedures of following products:
SOFAR 100KTLX-G4, SOFAR 110KTLX-G4, SOFAR 125KTLX-G4,
SOFAR 125KTLX-G4-A.
▶ Carefully read this manual before use and retain it for future reference!
▶ Treat this manual as an integral component of the device.
▶ Keep this manual in close proximity to the device, including when it is handed over
toanotheruserormovedtoadi󰘯erentlocation.
This manual contains important safety information on installation, operation and mainte-
nance of the device.
▶ Read and observe all given safety information.
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.
1.11.1 Copyright declarationCopyright declaration
The copyright of this manual is owned by SOFARSOLAR. It may not be copied – neither
partially nor completely – by companies or individuals (including software, etc.) and must
not be reproduced or distributed in any form, or with the appropriate means.
SOFARSOLARreservestherightto󰘰nalinterpretation.Thismanualmaybeamended
following feedback from users or customers.
Consult our website at: http://www.sofarsolar.eu for the latest version.
1.21.2 Presentation of warningsPresentation of warnings
This manual contains information on safe operation and uses symbols to ensure the
safetyofpersonsandpropertyaswellasthee󰘲cientoperationoftheinverter.
▶ Read through the following symbol explanations carefully in order to prevent injury or
property damage.
6/78 SOFAR 100...125KTLX-G4
About this Manual

WarnsymbolWarnsymbol
The general danger symbol warns of risk of serious injury when used
with the signal words CAUTION, WARNING, and DANGER.
SignalwordsSignalwords
NOTICENOTICE
Indicates a danger that results in damage to or destruction
of the inverter.
CAUTIONCAUTION Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
WARNINGWARNING Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
DANGERDANGER Indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
Sectional warningsSectional warnings
Sectional warnings refer to a complete section and are structured as follows:
WARNINGWARNING
Type and source of dangerType and source of danger
Consequences for non observanceConsequences for non observance
▶Avoiding the danger
Embedded warningsEmbedded warnings
Embedded warnings are part of an action sequence and are placed right before the
dangerous step.
WARNINGWARNING Combination of type/source of danger, consequences for non observance
and avoiding the danger.
Installation and User Manual 7/78
About this Manual

1.31.3 Presentation of action instructionsPresentation of action instructions
This table shows the sequence of Action steps
SymbolSymbol FunctionFunction
✔This describes an action requirement
1.1.
2.2.
3.3.
This is the sequence of action steps that must be followed step by step
▶ This is a single action step
This describes the result of the action
1.41.4 NoteNote
Notes are presented in a grey bar.
Provides tips essential to the optimal operation of the product.
8/78 SOFAR 100...125KTLX-G4
About this Manual

22 General Safety InformationGeneral Safety Information
This chapter details the safety information pertaining to the installation and operation of
the device.
If you have any questions or problems after reading the following information, contact
SOFARSOLAR.
Read and understand the instructions within this manual and familiarise yourself with
the relevant safety symbols in this chapter before beginning with the installation of the
device and eliminating any faults.
Beforeconnectingtothepowergrid,youmustobtaino󰘲cialauthorisationfromthelocal
power grid operator in accordance with the corresponding national and state require-
ments.Furthermore,operationmayonlybecarriedoutbyquali󰘰edelectricians.
Contact the nearest authorised service centre if any maintenance or repairs are re-
quired.
▶ Contact your dealer to obtain information about your nearest authorised service
centre.
▶ Do NOT carry out repairs on the device yourself; this may lead to injury or property
damage.
▶ Before installing the device or carrying out maintenance on it, you must open the DC
switch in order to interrupt the DC voltage of the PV generator. You can also switch
o󰘯theDCvoltagebyopeningtheDCswitchintheArrayjunctionbox.Notdoingthis
may result in serious injury.
Installation and User Manual 9/78
General Safety Information

2.12.1 Intended useIntended use
Grid Cloud
The SOFAR 100...125KTLX-G4 is a grid-coupled PV inverter with multiple MPPTs which
converts the direct current generated by PV systems into a three-phase alternating
current and feeds it into the public power grid. The AC circuit breaker and DC switch are
used as a disconnecting device and must be easily accessible.
SOFAR 100...125KTLX-G4 inverters may only be used with photovoltaic modules which
do not require one of the poles to be earthed. In normal operation, the operating current
mustnotexceedthelimitsspeci󰘰edwithinthetechnicaldata.Onlyphotovoltaicmodules
may be connected at the PV input of the inverter (no batteries or other power sources
must be connected). The installation of the inverter and auxiliary equipment should be
madebyaquali󰘰edtechnicianwhoisauthorizedtocarryoutsuchwork.
2.22.2 Target groupTarget group
Thismanualisintendedforquali󰘰edelectricianswhoareresponsiblefortheinstallation
and commissioning of the inverter in the PV system, as well as the PV system opera-
tors.
2.32.3 Quali󰘰edpersonnelQuali󰘰edpersonnel
Personnel tasked with the operation and maintenance of the device must have the qual-
i󰘰cations,competenceandexperiencerequiredtoperformthedescribedtasks,while
also being capable of fully understanding all instructions contained within the manual.
Forsafetyreasons,thisinvertermayonlybeinstalledbyaquali󰘰edelectrician.
Requirementsforquali󰘰edelectricians:
• Personnel has received training on occupational safety, as well as the installation
and commissioning of electrical systems.
• Personnel is familiar with the local laws, standards and regulations of the grid operator.
SOFARSOLAR assumes no responsibility for the destruction of property or any injuries
to personnel caused by improper usage.
10/78 SOFAR 100...125KTLX-G4
General Safety Information

2.42.4 Installation requirementsInstallation requirements
▶ Install the inverter according to the information contained in the following section.
▶ Mounttheinvertertoasuitableobjectwithasu󰘲cientload-bearingcapacity(e.g.
walls, PV frames etc.) and ensure that the inverter is upright.
▶ Choose a suitable place for the installation of electrical devices.
▶ Ensurethatthereissu󰘲cientspaceforanemergencyexitwhichissuitablefor
maintenance.
▶ Ensuresu󰘲cientventilationinordertoguaranteeanaircirculationforthecoolingof
the inverter.
▶ Installation of SOFAR 100...125KTLX-G4 on-grid inverter must conform with laws,
regulations, codes and standards applicable in the jurisdiction.
▶ Before connecting the product to the electrical utility grid, contact the local utility
company for allowance.
2.52.5 Transport requirementsTransport requirements
Thefactorypackagingisspeci󰘰callydesignedtopreventtransportdamage,i.e.violent
shocks, moisture and vibrations. However, the device must not be installed if it is visibly
damaged. In this case, notify the responsible transport company immediately.
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 exam-
inedandtestedbyquali󰘰edserviceortechnicalpersonnelbeforeusing.Forstorage
conditions see Technical Data on page 69.
2.62.6 Labelling on the deviceLabelling on the device
▶ The labels must NOT be concealed by items and foreign objects (rags, boxes, de-
vices, etc.). They must be regularly cleaned and kept clearly visible at all times. See
chapter About the Product on page 13.
2.72.7 Electrical connectionElectrical connection
▶ Observe all applicable electrical regulations when working with the Solar inverter.
▶ Before establishing the electrical connection, cover the PV modules using opaque
material or disconnect the PV generator from the inverter. Solar radiation will cause
dangerous voltage to be generated by the PV generator!
▶ All installations and electrical connections may only be carried out by trained electricians!
▶ Authorisation for grid feed-in. Obtain authorisation from the local power grid operator
before connecting the inverter to the public power grid.
Installation and User Manual 11/78
General Safety Information

2.82.8 OperationOperation
▶ Contact with the electrical grid or the device’s terminals may result in an electric
shockor󰘰re!
▶ Do not touch the terminal or the conductor which is connected to the electrical grid.
Follow all instructions and observe all safety documents that refer to the grid connection.
▶ While the inverter is being operated, several internal components will become very
hot. Wear protective gloves! Keep children away from the device!
▶ The PV generator must be earthed in accordance with the requirements of the local
power grid operator!
▶ For reasons of personal safety, we recommend that all PV module frames and
inverters of the PV system are reliably earthed.
▶ Ensure that the input voltage does not exceed the maximum permissible voltage.
Overvoltage may cause long-term damage to the inverter, as well as other damage
that is not covered by the warranty!
2.92.9 Repair and maintenanceRepair and maintenance
▶ Beforecarryingoutanyrepairwork,󰘰rstswitcho󰘯theACcircuitbreakerbetween
the inverter and power grid, and then the DC switch.
▶ Afterswitchingo󰘯theACcircuitbreakerandtheDCswitch,waitaminimumof5
minutes before starting any maintenance or repair work.
▶ Following the elimination of any faults, the inverter should be fully functional once
more. Should any repairs be required, contact a local authorised service centre.
▶ The internal components of the inverter must NOT be opened without the relevant
authorisation. Shenzhen SOFARSOLAR Co., Ltd. assumes no responsibility for any
resulting losses or defects.
2.102.10 WarrantyWarranty
▶ Do not open the inverter or remove any of the labels.
Otherwise, SOFARSOLAR shall assume no guarantee.
12/78 SOFAR 100...125KTLX-G4
General Safety Information

33 About the ProductAbout the Product
3.13.1 OverviewOverview
Front side Back side
AABBCCDD
AAControl panel and display
BBAC connection box
CCFan cooling box
DDDC connection board
3.23.2 DimensionsDimensions
SOFAR 100...125KTLX-G4
L × W × H = 970 x 695 x 325 mm
Installation and User Manual 13/78
About the Product

3.33.3 Symbols and signs on the inverterSymbols and signs on the inverter
Several symbols pertaining to safety can be found on the inverter. Read and understand
the content of these symbols before starting the installation.
SymbolSymbol DescriptionDescription
5min
Residual voltage is present in the inverter! Before opening the
inverter,youshouldwait󰘰veminutestoensurethatthecapacitorhas
been fully 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
IPIP Device degree of protection according to EN 60529
Positive and negative poles of the DC input voltage
The inverter must always be transported and stored with the arrows
pointing upward
14/78 SOFAR 100...125KTLX-G4
About the Product

SymbolSymbol DescriptionDescription
The temperature range in which the inverter can operate
RCM (Regulatory Compliance Mark)
The product meets the requirements of the applicable Australian
standards.
3.43.4 Power grid typesPower grid types
SOFAR 100...125KTLX-G4 are compatible with the following grid types:
L1
L2
N
L1
L3
PE
Inverter
PE
TN-S
Transformer
Inverter
Transformer
L1
L2
N
L1
L3
PE
Inverter
PE
TN-S
Transformer
Inverter
Transformer L1
L2
L1
L3
Inverter
PE
Transformer
Inverter
Transformer
L1
L2
L3
Inverter
Transformer
Inverter
Transformer
L1
L2
N
L1
L3
PE
Inverter
PE
TN-C-S
Transformer
Inverter
Transformer
L1
L2
N
L1
L3
PE
Inverter
PE
Transformer
Inverter
Transformer
L2
N
L3
Inverter
PE
Transformer
Inverter
Transformer
L2
Inverter
PE
TT
Transformer
Inverter
Transformer
L2
N
L3
Inverter
PE
Transformer
Inverter
Transformer
L2
N
L3
Inverter
PE
IT
Transformer
Inverter
Transformer
TN-C
PEN
PPoowweerr GGrriidd TTyyppeess
3.53.5 Functional featuresFunctional features
TheDCoutputgeneratedbythePVgeneratoris󰘰lteredbytheinputboardbeforeit
reaches the power board. The input board also provides functions such as the detection
of insulation impedance and the measurement of the DC current and voltage. The DC
currentisconvertedintoACcurrentbythepowerboard.TheACcurrentis󰘰lteredby
the output board and fed into the power grid. The output board also provides functions
such as grid voltage and current measurement, earth fault protection and a disconnect-
ing relay. The control board supplies the auxiliary energy, controls the operating state
of the inverter and displays the operating status on the display board. An error code will
appear on the display if the inverter is in an abnormal operating state. At the same time,
the control board may trigger the relay in order to protect the internal components.
Installation and User Manual 15/78
About the Product

FunctionsFunctions
A. Digital inputs (DRMs)
Theinvertercanbeswitchedon/o󰘯orthegridpowercanbecontrolledviatheexter-
nal control.
B. Feeding of reactive power into the grid
The inverter is capable of generating reactive power and can also feed it into the
grid. The setting of the power factor (Cos Phi) can be controlled via the serial RS485
interface.
C. Limitation of the active power fed into the grid
Theinvertercanlimittheactivepowerfedintothegridtoaspeci󰘰cvalue(asaper-
centage of the rated output).
D. Output reduction at overfrequency within the grid
If the grid frequency is higher than the limit value, the inverter will reduce the output
power; this is required to ensure stability of the grid.
E. Data transfer
The inverter (or a group of inverters) can be monitored remotely via the RS485 com-
munication bus or via WiFi/GPRS.
F. Software update
The device supports local updates via USB stick and remote updates via WiFi/
GPRS.
G. PID recovery
ThePIDe󰘯ectofPVmodulescanberecoveredduringnight-timebyapplyinga
negative DC voltage to the PV Array.
H. AFCI (Arc Fault Circuit Interruptor)
TheinverterdetectsarcfaultsonthePVgeneratorsideandswitcheso󰘯toprotect
the system.
I. IV Curve Scanning
The IV curve for each MPPT can be measured on demand and used in the monitor-
ing portal to analyze potential issues in the PV array.
J. Integrated grid relais
The relais can be operated by a central grid protection device to disconnect the
inverter within 100 ms.
16/78 SOFAR 100...125KTLX-G4
About the Product

3.63.6 Electrical block diagramElectrical block diagram
SOFAR 100...125KTLX-G4 has 20 DC input strings. 10 MPPT tracker’s that converts
direct current of the PV array to grid-compliant, three-phase current and feeds it into the
utility grid. Both DC and AC side has Surge Protection Device (SPD Type II).
PV1+
PE
PV1-
PV10+
PV10-
SPD
Type II
DC/AC
R
S
T
N
PE
SPD
Type II
DC
Filter
MPPT 10
MPPT 1
3.73.7 PID RecoveryPID Recovery
When the inverter is running, the PID function module increases the potential between
the negative pole of the photovoltaic array and the ground to a positive value to sup-
pressthePIDe󰘯ect.
• Before enabling the PID recovery function, ensure that the polarity of the pv
module‘s ground voltage meets requirements. If in doubt, contact the pv module
manufacturer or read their corresponding User Manual.
• If the voltage scheme of the PID protection/recovery function does not meet the re-
quirements of the corresponding PV module, the PID function cannot work properly
or may even damage the PV module.
• Before enabling the reverse PID function, ensure that the inverter has been applied
to the IT system.
• When the inverter is not running, the PID module will apply reverse voltage to the
photovoltaic module to restore the degraded module.
• If the PID recovery function is enabled, the PID works only at night.
• After the PID recovery function is enabled, the PV series voltage to ground is
500Vdc by default. You can change the default value through the App.
Installation and User Manual 17/78
About the Product

44 InstallationInstallation
DANGERDANGER
Hot surface of the inverterHot surface of the inverter
Riskof󰘰reduetoignitionof󰘱ammablematerialsfromthehotsurfaceoftheRiskof󰘰reduetoignitionof󰘱ammablematerialsfromthehotsurfaceofthe
inverterinverter
▶Donotinstalltheinverteron󰘱ammablematerial.
▶Donotinstalltheinverterinanareainwhich󰘱ammableorexplosivematerialis
stored.
CAUTIONCAUTION
Hot housing and heat sink of the inverterHot housing and heat sink of the inverter
Risk of burns when touching hot surfaces of the operated inverter.Risk of burns when touching hot surfaces of the operated inverter.
▶Do not install the inverter in places where it can be accidentally touched.
CAUTIONCAUTION
High weight of the inverterHigh weight of the inverter
When falling down the inverter can cause injuries and may be damaged.When falling down the inverter can cause injuries and may be damaged.
▶Take into account the weight of the inverter when transporting and moving it.
▶Wear protection shoes when handling the inverter.
▶Choose a suitable installation location and surface.
▶Commission a minimum of two persons with the installation of the inverter.
▶Do not set down the inverter upside-down.
18/78 SOFAR 100...125KTLX-G4
Installation

4.14.1 Before installationBefore installation
Inverter StorageInverter 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 (see chapter11 Technical Data on page 69).
• 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 ex-
aminedandtestedbyquali󰘰edserviceortechnicalpersonnelbeforeusing.
Checking the external packaging materialsChecking the external packaging materials
NOTICENOTICE
Improper handling during transportImproper handling during transport
Packging, inverter and components may be damage. Even if no externalPackging, inverter and components may be damage. Even if no external
damage is visible, components inside the device may be damaged.damage is visible, components inside the device may be damaged.
▶Check the external packaging material for damage, e.g. holes and cracks. If you
discover any cases of damage, do not unpack the inverter and contact the transport
company and/or dealer immediately.
▶Do not install the inverter if the packaging was damaged.
• It is recommended that the packaging material should be removed within 24 hours
before installing the inverter.
• Keep the original packaging and use it whenever the inverter needs to be shipped
or transported.
Installation and User Manual 19/78
Installation

Unpacking the inverterUnpacking the inverter
▶ Open the packaging and have at least two peo-
ple grip underneath the inverter at both sides.
–– Do not put the inverter with wiring terminals
contactingthe󰘱oorbecausethepower
ports and signal ports are not designed to
support the weight of the inverter.
–– Whenplaceinverteronthe󰘱oor,putit
above foam or paper to avoid the damage
of the shell of inverter.
CAUTIONCAUTION The inverter is heavy and may fall
down during transport. At least two people
are required to lift it, or you can use a forklift.
Keep your balance when lifting the inverter.
▶ Lift the inverter out of the packaging and
move it to its installation position horizon-
tally.
Checking the delivery scopeChecking the delivery scope
▶ Check that the delivery is intact and complete.
In the event of any damage or missing components, contact the wholesaler.
ImageImage QtyQty DescriptionDescription ImageImage QtyQty DescriptionDescription
1 SOFAR
100KTLX-G4
...
125KTLX-G4
1 Rear Panel
20 PV+ input con-
nector
20 PV- input con-
nector
20 PV+ metal pin 20 PV- metal pin
20/78 SOFAR 100...125KTLX-G4
Installation