Sungrow SG80KTL User manual

SG80KTL-UEN-Ver12-201801 Version: 1.2
User Manual
SG80KTL
PV Grid-connected Inverter

I
About This Manual
This manual is for string inverter SG80KTL (hereinafter referred to as inverter unless
otherwise specified). The inverter is grid-connected, transformer-less, robust and of
high conversion efficiency. We hope the inverter will satisfy you when you use it
with your PV plant system.
Aim
This manual contains information about the inverter, which will provide you
guidelines to connect the inverter into the PV power system and how to operate the
inverter.
Related Documents
The manual cannot include all information about the PV system. You will get
additional information at www.sungrowpower.com or via webpage of the
manufacturer.
Target Group
This manual is for technical personnel who is responsible for inverter installation,
operation and maintenance and inverter owner who will perform daily LCD
operation.
How to Use This Manual
Read the manual and other related documents before any work on the inverter.
Documents must be stored carefully and available at all times.
All rights reserved including the pictures, markings and symbols used. Any
reproduction or disclosure, even partially, of the contents of this manual is strictly
forbidden without prior written authorization of Sungrow.
The contents of the manual will be periodically updated or revised due to the
product development. It is probably that there are changes of manual in the
subsequent inverter edition. The latest manual can be acquired via visiting the web
site at www.sungrowpower.com.
Symbols Explanation
Important instructions contained in this manual should be followed during

II
installation, operation and maintenance of the inverter. And they will be highlighted
by the following symbols.
DANGER indicates a hazard with a high level of risk which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazard with a medium level of risk which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which, if not avoided,
could result in minor or moderate injury.
NOTICE indicates a situation
which, if not avoided, could result in
equipment or property damage.
NOTE indicates additional information, emphasized contents or tips to
help you solve problems or save time.
Symbols on the Inverter Body
WARNING
Disconnect the inverter from all the
external power sources before service!
Do not touch live parts until
10 minutes after disconnection
from the sources!
10 min
Hot surface! May exceed 60℃！
Danger to life due to high voltages!
Only qualified personnel can open
and service the product!
Check user manual before service!

III
Content
About This Manual ..........................................................................I
1Safety Instructions...................................................................1
2Product Description.................................................................6
2.1 Intended Usage...................................................................................................6
2.2 Product Introduction.........................................................................................7
2.2.1 Appearance ............................................................................................................. 7
2.2.2 Dimensions.............................................................................................................. 8
2.2.3 LCD Display.............................................................................................................. 8
2.2.4 DC Switch................................................................................................................. 9
2.3 Technical Description..................................................................................... 10
2.3.1 Circuit Diagram ....................................................................................................10
2.3.2 Function Description..........................................................................................11
2.3.3 Derating..................................................................................................................11
3Installation Flow.....................................................................14
4Unpacking and Storage.........................................................16
4.1 Unpacking and Inspection ........................................................................... 16
4.2 Identifying Inverter ......................................................................................... 16
4.3 Scope of Delivery............................................................................................. 18
4.4 Inverter Storage ............................................................................................... 18
5Mechanical Installation .........................................................20
5.1 Installation Site Selection.............................................................................. 20
5.2 Moving Inverter to Installation Site............................................................ 22
5.3 Installing the Inverter ..................................................................................... 23
5.3.1 Installing to Metal Frame ..................................................................................23
5.3.2 Installing to Concrete Wall................................................................................25
6Electrical Connection.............................................................28
6.1 Terminal Description ...................................................................................... 28

IV
6.2 AC Side Cable Connection ............................................................................ 29
6.2.1 AC side requirements.........................................................................................29
6.2.2 Grid Connection...................................................................................................32
6.3 PV Array Connection....................................................................................... 36
6.3.1 PV Input Configuration......................................................................................36
6.3.2 PV Input Connection ..........................................................................................38
6.4 Grounding the Inverter.................................................................................. 41
6.4.1 Grounding System Overview...........................................................................41
6.4.2 Second Protective Earth Terminal ..................................................................42
6.5 Communication Connection........................................................................ 43
6.5.1 Communication Overview ...............................................................................43
6.5.2 RS485 Communication System.......................................................................44
6.5.3 RS485 Communication Connection ..............................................................46
6.6 Configurable Dry Contact............................................................................. 47
7Commissioning ......................................................................50
7.1 Inspection before Commissioning............................................................. 50
7.2 Commissioning Procedure ........................................................................... 50
8Disconnecting, Dismantling and Disposing the Inverter ....54
8.1 Disconnecting the Inverter........................................................................... 54
8.2 Dismantling the Inverter ............................................................................... 55
8.3 Disposal of the Inverter.................................................................................. 55
9Troubleshooting and Maintenance ......................................56
9.1 Troubleshooting .............................................................................................. 56
9.1.1 Troubleshooting of LED Indicator ..................................................................56
9.1.2 Troubleshooting of Faults in LCD Screen.....................................................56
9.2 Maintenance ..................................................................................................... 61
9.2.1 Routine Maintenance.........................................................................................61
9.2.2 Maintenance Instruction...................................................................................61
9.3 Contact Sungrow Service.............................................................................. 64
10 Operation of LCD Display ......................................................65
10.1 Description of Button Function................................................................... 65

V
10.2 Menu Tree .......................................................................................................... 66
10.3 Main Screen....................................................................................................... 67
10.4 Contrast Adjustment ...................................................................................... 68
10.5 Checking Running Information................................................................... 68
10.6 Checking History Information ..................................................................... 70
10.6.1 Checking Running Records............................................................................70
10.6.2 Checking Fault Records...................................................................................70
10.6.3 Checking History Event Records ..................................................................71
10.6.4 Checking Energy Records...............................................................................71
10.7 Starting/Stopping............................................................................................ 72
10.8 Password Entry................................................................................................. 73
10.9 System Parameter Setting............................................................................. 73
10.9.1 Language Setting..............................................................................................73
10.9.2 Time Setting........................................................................................................74
10.9.3 Total Energy Deviation Adjustment ............................................................74
10.9.4 Load Default .......................................................................................................75
10.9.5 Checking Firmware Version ...........................................................................75
10.10 Running Parameter Setting.......................................................................... 76
10.10.1 Main Screen of Run-param ..........................................................................76
10.10.2 Active/Reactive Power Parameters ...........................................................78
10.10.3 Reactive Power Regulation..........................................................................78
10.10.4 Reactive Power Setting for Italy .................................................................81
10.10.5 Save P/Q-set .....................................................................................................83
10.10.6 Time Parameters..............................................................................................83
10.10.7 LVRT Parameter ...............................................................................................84
10.10.8 Derating Parameters......................................................................................84
10.10.9 ISO Parameters ................................................................................................84
10.11 Protection Parameter Setting ...................................................................... 85
10.11.1 Country Setting...............................................................................................85
10.11.2 Single-stage Protection Parameter Setting............................................87
10.11.3 Multi-stage Protection Parameter Setting..............................................87
10.11.4 Protection Recovery Setting .......................................................................88

VI
10.11.5 Protection Parameter Confirmation .........................................................88
10.12 Communication Parameter Setting ........................................................... 88
10.13 Advanced Parameters Setting ..................................................................... 89
10.13.1 PVS Detect Settings .......................................................................................89
10.13.2 10min Max-V ....................................................................................................90
10.13.3 Grid Unbalance................................................................................................91
11 Appendix ................................................................................92
11.1 Technical Data .................................................................................................. 92
11.2 Exclusion of Liability ....................................................................................... 93
11.3 About Us............................................................................................................. 94
11.4 Contact Information ....................................................................................... 95

1
1 Safety Instructions
The inverter has been designed and tested strictly according to the international
safety regulations. As electrical and electronic equipment, safety instructions related
to them must be complied with during installation, commissioning, operation and
maintenance. Incorrect operation or work may result in damage to:
The life and well-being of the operator or a third party
The inverter and other properties that belong to the operator or a third party
Therefore, the following general safety instructions must be read and always kept in
mind prior to any work. All detailed work-related safety warnings and notes will be
specified at the critical points in corresponding chapter.
All installations should be performed by technical personnel. They have:
received professional training;
read through this manual and understood all related safety instructions;
been familiar with electric system related safety instructions.
Technical personnel mentioned above may perform the following work:
Install the inverter onto the wall;
Connect the inverter to the PV system;
Connect other devices to the PV system;
Commission the inverter;
Operate and maintain the inverter.
Before Installation
The unit is thoroughly tested and strictly inspected before delivery. Damage
may still occur during shipping.
If there is visible damage to the packaging or the inner contents, or if there
is something missing, contact Sungrow or the forwarding company.

1 Safety Instructions User Manual
2
There is a risk of injury due to improperly handling the device!
Always follow
the instructions in the manual when moving and
positioning the inverter.
Injuries, serious wounds, or bruis
e may follow if the device is improperly
handled.
During Installation
Make sure inverter is not electrically connected before installing the
inverter.
System performance loss due to bad ventilation!
The equipment requires good quality ventilation during operation. Keep
the unit upright and nothing covering the heatsink.
During Electrical
All electrical connection must be in accordance with national and local
standards.
The connection to the grid can be done only after receiving approval from
the local utility grid company.
Lethal voltage exists!
PV arrays will produce electrical energy when exposed to sunlight and thus can
create potential electrical shock hazards.
All cables must be firmly attached, undamaged, properly insulated and
adequately dimensioned.

User Manual 1 Safety Instructions
3
During Inverter Operation
Do not disconnect inverter DC side connection while the inverter AC side is
under load!
First, de-energize inverter from dual power scores and then verify that there is
no voltage present.
Do not open inverter enclosure when inverter is under load or operating.
Only intact and locked inverter cabinet can ensure personal and property
safety.
There is a risk of burn!
Do not touch device hot parts (for example, the heatsink) during operation.
Only the LCD display and DC switch can be touched during operation.
Operate the inverter by strictly following the descriptions in this manual to avoid
unnecessary injury to the persons and damage to the device. Arc flash, fire or
explosion may follow if otherwise and Sungrow will hold no liability for the
damages followed.
At least the following improper operations can cause the arc flash, fire and
explosion inside the device. Remember all the time that these accidents can
only be handled by qualified personnel. Improper handling of the accidents
occurred may lead to more serious fault or accident.
Plug and unplug the DC side HV fuse when it is alive;

Touch the end of the cables that has no insulating treatment and may still
be alive;
Touch the connection copper bus bar, terminal or other spare parts inside
the device that may be alive;
The power cable connection is loose;
Spare parts like the bolts are falling inside the inverter;

1 Safety Instructions User Manual
4

Incorrect operation of the non-qualified persons that receives no training;
Before any operation to the device, a beforehand assessment of the
possible arc flash in the operation area is necessary. If there is arc flash,
The operators must receive related safety trainings;
Try the best to assess the areas that may appear the electric shock;
Before any operation in the area that may appear electric shock, wear
personal protective equipment (PPE) that meets the requirement. A PPE
category 2 is recommended.
Maintenance and Service
There is a risk of inverter damage or personal injury due to incorrect service
work!
Before any operation, you should perform the following steps:
First disconnect the grid side switch and then disconnect he DC switch;
Wait at least 10 minutes until the inner capacitors are discharged
completely;
Verify, using proper testing device to make sure there is no voltage or
current.
Keep unrelated person away!
A temporary warning sign and barrier must be posted to keep non-related
person away during electrical connection and maintenance.

Restart the inverter only when the fault that may impair the inverter
safety functions is removed.
Inverter contains no owner serviceable part inside. Please contact local
authorized personnel if any service work is required.

User Manual 1 Safety Instructions
5
Do not replace the inverter internal components without permission.
Damages may follow and it may void any or all warranty rights from
Sungrow.
There is a risk of inverter damage due to electrostatic discharge!
The printed circuit boards contain components sensitive to electrostatic
discharge.
Wear a grounding wrist band when handling the boards.
Avoid unnecessary touch with the boards.
Others
Certain parameter setting (country selection, etc.) on the LCD display must
only be done by professional persons.
Incorrect country setting may affect the inverter normal operation and
cause a breach of the type-certificate marking.
All safety instructions, warning labels nameplate on the inverter:
Must be clearly visible;
Should not be removed or covered.
Respect the following regulations:
Grid-connection regulations;
Safety instructions related to PV arrays;
Safety instructions related to other electrical devices.

6
2 Product Description
2.1 Intended Usage
SG80KTL inverter, 3-phase string inverter without transformer, is a crucial unit in the
PV power system.
Inverter is designed to convert the direct current power generated from the PV
modules into grid-compatible AC current and feeds the AC current to the utility grid.
The intended usage of the inverter is illustrated in Fig. 2-1.
Inverter cannot connect the PV strings whose positive and negative
terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit
breaker.
Inverter is applicable only to the grid-connected PV system. Any other
usage is strictly forbidden.
A B C D
Fig. 2-1 Inverter application in PV power system
Item
Description
Note
A PV strings Monocrystalline silicon; polycrystalline silicon and thin-film
without grounding
B Inverter SG80KTL
C
Metering
device
Measure inverter output energy
D
Utility grid
TT, TN-C, TN-S, TN-C-S, IT
If the local altitude is above 3000m, the inverter cannot apply to the IT grid system.
The following figure shows the common grid configurations.

User Manual 2 Product Description
7
L2
L1
L3
SG80KTL
PE
IT
Transformer
L2
N
L1
L3
SG80KTL
PE
TT
Transformer
L2
PEN
L1
L3
SG80KTL
PE
TN-C
Transformer Transformer
L2
N
PE
L1
L3
SG80KTL
PE
TN-C-S
L2
N
PE
L1
L3
SG80KTL
PE
TN-S
Transformer
More than one inverter can be connected to the system if the capacity of the PV
system exceeds the capacity of a single inverter. Connect proper PV input for each
inverter at the input side and connect the output side to the grid.
2.2 Product Introduction
2.2.1 Appearance
24
5
3
1
67
8
3
Fig. 2-2 Appearance
* Pictures are indicative only. Product in kind prevail.

2 Product Description User Manual
8
No.
Name
Description
1 LCD display
Human-computer interface for viewing of the running
information and parameter configuration.
2
Electrical
connection area
Include DC terminal, AC terminal ad RS485
communication terminal.
3 Handles
Handles are designed for transporting, installing and
disassembling the inverter
4 PE second terminal
Specified in EN 50178, user can connect this terminal
as per requirements.
5
Air outlet
Controlled forced-air cooling method. Ensure well
ventilation.
6
Hanger
Hang the inverter to the backplate.
7
Fans
3 fans used for inverter forced cooling
8 DC switch
Protective components to safely disconnect DC side
current.
2.2.2 Dimensions
267
932
Fig. 2-3 Dimensions of the inverter (in mm)
2.2.3 LCD Display
As a human-computer interaction interface, LCD display comprises two LED
indicators and two buttons for user to check the inverter operation information and
configure inverter parameters.

User Manual 2 Product Description
9
1
1
3
2
2
Fig. 2-4 LCD display
Tab. 2-1 Description of LCD display
No.
Name
Description
1
LED
indicators
“RUN” and FAULT”. Indicate the inverter operation state.
Detailed explanation is shown in Tab. 2-2
2 Buttons
Two buttons for LCD operation and parameter configuration.
Detailed explanation is shown in Tab. 10-1
3 LCD screen
Display inverter present state, operation information, history
information and parameters, etc.
Tab. 2-2 Description of LED indicators
LED state
Description
“RUN”: ON
Inverter is running.
“FAULT”: OFF
“RUN”: OFF
A fault occurs,
or protection function is enabled.
“FAULT”: ON
“RUN” : OFF
Inverter does not operate,
or communication fault occurs between the DSP and LCD
display.
“FAULT”: OFF
“RUN”: Flicker
Warning information occurs to the inverter.
“FAULT”: OFF
2.2.4 DC Switch
DC switch is used to disconnect the DC current safely whenever necessary.
Inverter operates automatically when input and output requirements are met. Turn
the DC switch to the OFF position to stop the inverter when a fault occurs or when
you need to stop the inverter.
Turn the DC switch to the ON position before restart the inverter.

2 Product Description User Manual
10
2.3 Technical Description
2.3.1 Circuit Diagram
Fig. 2-5 shows the main circuit of the inverter.
MPPT is utilized for DC input to ensure the maximum power from the PV array at
different PV input conditions.
Inversion circuit converts the DC power into AC power and feeds the AC power to
the utility grid through the AC terminal. The protection circuit is equipped to ensure
the device safe operation and personal safety.
DC switch is used to disconnect the DC current safely; inverter provides standard
RS485 ports for communication. User can check running data and set related
parameter through the LCD display.
Inversion circuit
LCD/RS485
DSP+CPLD
DC
L1
L2
L3
PE
L3
L2
L1 PE
DC
DC In
+ -
+ -
L1 L2 L3
DC EMI
Filter
DC bus
Inversion
circuit
AC
EMI
Filter
AC
Reactor
Relay
Junction box
Fan
DC SPD
DC
switch
DC fuse
Auxiliary
power circuit
Current detection
Fig. 2-5 Circuit diagram of SG80KTL

User Manual 2 Product Description
11
2.3.2 Function Description
Inversion function
Inverter converts the DC current into grid-compatible AC current and feeds the
AC current into grid.
Data storage and display
Inverter achieves the running information, fault records and etc. and displays
them on the integrated LCD display.
Parameter Configuration
Inverter provides various parameter configuration for inverter optimal operation.
Communication Interface
Standard RS485 port, can be connected to monitoring device and PV system
Protection Function
−Short-circuit protection
−Ground insulation resistance detection
−Inverter output voltage monitoring
−Inverter output frequency detection
−Residual current protection
−DC injection of AC output current surveillance
−Anti-islanding protection
−Ambient temperature monitoring
−DC over-voltage protection
−Over-current protection
−Power module over-temperature protection
2.3.3 Derating
Output derating is a way to protect the inverter from overload or potential faults.
Situations require inverter power derating are:
Internal temperature is too high (including ambient temperature and module
temperature)
Grid voltage is too low
External power class adjustment
Grid frequency is too high[*]
Note: [*] valid only when the country selected is DE or IT.

2 Product Description User Manual
12
Power Limit Setting
Inverter output power can be adjusted via the LCD display or remote grid dispatch
from the grid company. The corresponding operating state will display on the LCD
screen.
Over-temperature Derating
High ambient temperature, fan broken or poor ventilation will lead to inverter
power derating.
When the module temperature exceeds the upper limit, inverter will derate
power output until the temperature drops within the permissible range.
When the internal temperature exceeds the upper limit, inverter will derate
power output until the temperature drops within the permissible range.
Ambient Temperature [°C]
Temperature Derating Curve（Vac=400V）
S（KVA）
80
60
26.4
45 50 60
0
70
Vmpp=600V
Vmpp=700V
Vmpp=800V
32
Vmpp=850V
Lower limit of the over-temperature derating: 33% of the nominal
power.
If the module temperature and internal temperature reach to power
derating conditions, inverter will derate the power output according to
the lower temperature between the two.
Grid Under-voltage Derating
When grid voltage is low, inverter will derate the output power to make sure the
output current is within the permissible range. Once the grid voltage is within
Vmin…215V, inverter will derate the output power.
The voltage displayed in the follow figure is the phase voltage.