Sungrow SG8KTL-EC User manual

SG8_10_12KTL-ECV11-UEN-Ver15-201508Version：1.5
User Manual
SG8KTL-EC/SG10KTL-EC/
SG12KTL-EC
PV Grid-Connected Inverter

I
About This Manual
This manual is for the inverters SG8KTL-EC, SG10KTL-EC, and SG12KTL-EC
(hereinafter referred to as the inverter unless specified otherwise). They are
grid-connected, transformer-less, robust inverters with high conversion efficiency.
The devices will bring you profit for PV power system.
Aim
The manual contains information about the inverter, which will provide you
guidelines to connect the inverter into the PV power system and to operate the
inverter.
Related Documents
The manual cannot include complete information about the PV system. You will get
the additional information about other devices at www.sungrowpower.com or via
webpage of device manufacturer.
Target Group
The manual is targeted to technical personnel who is responsible for inverter
installation and commissioning in the PV power system 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 t imes.
The contents of the manual will be periodically updated or revised due to product
development. It is probably that there are changes of manual in subsequent inverter
edit ion. The latest manual can be acquired via www.sungrowpower.com.

II
Symbols Explanation
Important instructions contained in this manual should be followed during
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 informat ion, emphasized contents or tips to
help you solve problems or save t ime.

III
Symbols on the Inverter Body
Disconnect the inverter from mains and PV generator before
service!
Do not touch any inner live parts until 10 minutes after
disconnection from the utility grid and the PV input.
Hot surface! In order to reduce the risk of burns, do not touch the
hot surface when the device is running.
Look over the user manual before any operation on the inverter!
The installation and service of the inverter unit can only be
performed by qualified personnel.

IV
Contents
About This Manual...................................................................I
1Safety Instructions............................................................ 1
2Product Introduction.........................................................6
2.1 Intended Usage............................................................................... 6
2.2 Product Description.........................................................................7
2.2.1 Inverter Appearance.......................................................................... 7
2.2.2 Inverter Dimensions..........................................................................8
2.2.3 LCD Display Panel.............................................................................8
2.3 Technical Description...................................................................... 9
2.3.1 Circuit Descript ion ............................................................................9
2.3.2 Funct ions Descript ion..................................................................... 10
3Unpacking and Storing .................................................... 12
3.1 Unpacking and Inspecting..............................................................12
3.2 Moving the Inverter........................................................................12
3.3 Ident ifying Inverter ........................................................................13
3.4 Delivery Contents ..........................................................................14
3.5 Storing the Inverter ........................................................................15
4Securing Inverter to the Wall............................................ 16
4.1 Selecting Installation Locat ion ......................................................16
4.2 Moving Inverter to Installat ion Site ................................................19
4.3 Installing the Inverter.....................................................................20
5Electrical Connection ...................................................... 24
5.1 Overview of Electrical Connection................................................. 24
5.2 Terminals Descript ion ................................................................... 26
5.3 Meter Connection (optional)......................................................... 26
5.4 Connecting Inverter to Grid............................................................27
5.4.1 AC Side Requirements..................................................................... 27

V
5.4.2 Assembling AC Cables to Connector................................................ 29
5.5 Connecting Inverter to PV Arrays ...................................................30
5.5.1 PV Inputs Configuration...................................................................31
5.5.2 Assembling DC Cable to Connector ..................................................33
5.5.3 DC Wiring Procedure....................................................................... 35
5.6 Grounding the Inverter...................................................................38
5.6.1 Grounding System Overview........................................................... 38
5.6.2 Second Protect ive Earth Terminal ................................................... 39
5.7 Communication Connection ......................................................... 40
5.7.1 Interfaces Overview ........................................................................ 40
5.7.2 RS485 Communication Connection................................................. 41
5.7.3 Ethernet Communication Connection ............................................. 44
5.7.4 Power Control Configuration .......................................................... 47
6Visiting and Configuring the Webserver.............................53
6.1 User and Authority .........................................................................53
6.2Login Interface...............................................................................53
6.3 Main Interface............................................................................... 54
6.3.1 Summary Information .................................................................... 54
6.3.2 Detailed Information ...................................................................... 55
6.4 Parameter Settings....................................................................... 56
6.4.1 System Parameters ........................................................................ 56
6.4.2 Operating Parameters.................................................................... 56
6.4.3 Protection Parameters ................................................................... 58
6.4.4 Communication Parameters........................................................... 59
6.5 History Record .............................................................................. 60
6.5.1 Running Record .............................................................................. 60
6.5.2 Fault Record ...................................................................................60
6.5.3 Event Record .................................................................................. 61
6.6 Power Control Configuration .........................................................61
6.7 Output Node................................................................................. 62
6.8 System Information ...................................................................... 62

VI
7Commissioning............................................................... 63
7.1 Inspection before Commissioning ..................................................63
7.2 Commissioning Procedure .............................................................63
8Disconnecting, Dismantling and Disposing of the Inverter.. 67
8.1 Disconnecting the Inverter.............................................................67
8.2 Dismantling the Inverter ............................................................... 68
8.3 Disposing of the Inverter ............................................................... 68
9Troubleshooting and Maintenance ................................... 69
9.1 Troubleshooting ........................................................................... 69
9.1.1 Troubleshoot ing of LED Indicator....................................................69
9.1.2Troubleshooting of Faults in LCD Screen .........................................69
9.2 Maintenance.................................................................................. 75
9.2.1 Routine Maintenance ..................................................................... 75
9.2.2 Maintenance Instruct ion................................................................. 76
10 Operating the LCD Menu ................................................. 77
10.1 Description of Button Function...................................................... 77
10.2 Inverter Menu Structure .................................................................78
10.3 Main Screen...................................................................................79
10.4 Adjusting Contrast.........................................................................81
10.5 Viewing Detailed Running Informat ion ..........................................81
10.6 History Running Information..........................................................83
10.6.1 Fault Records ................................................................................ 83
10.6.2 History Event Records................................................................... 83
10.6.3 Running Information Records........................................................84
10.7 Starting and Stopping the inverter .................................................85
10.8 Entering Password .........................................................................85
10.9 Button Operation for Parameters Setting ..................................... 86
10.10 Setting System Parameters .......................................................... 86
10.10.1 Setting the Time .........................................................................86
10.10.2 Energy Adjustment ..................................................................... 87
10.10.3 Load Default ............................................................................... 87

VII
10.10.4 System Configuration................................................................. 88
10.10.5 FirmwareVersion ........................................................................89
10.11 Setting Running Parameter........................................................... 90
10.11.1 Main Screen of Run-param........................................................... 90
10.11.2 React ive Power Regulation ......................................................... 91
10.11.3 Save P/Q-set................................................................................ 93
10.12 Setting Protective Parameters...................................................... 94
10.13 Setting Communication Parameters ..............................................97
10.14 Setting PV Configuration Mode.................................................... 98
10.15 Special Sett ings for Austria and Vorarlberg.................................... 98
10.15.1 Over-frequency Sett ing for Austria and Vorarlberg ....................... 98
10.15.2 Reactive Power Regulation for Austria and Vorarlberg ................. 99
10.15.3 Protect ive Parameters Setting for Austria and Vorarlberg...........101
10.16 Special Sett ings for Italy ..............................................................104
10.16.1 Over-frequency Derating Setting for Italy.................................. 104
10.16.2 Reactive Power Regulation for Italy............................................105
10.16.3 Protective Parameters Setting for Italy ......................................107
11 Viewing PV Plant Information ........................................ 110
11.1 SolarInfo Bank Connection...........................................................110
11.1.1 For Common User.........................................................................110
11.1.2 For Professional User....................................................................111
11.2 Registration and Adding PV Plant ................................................114
11.3 Viewing Information via the APP..................................................118
11.3.1 Acquisition and Installation of the APP .........................................118
11.3.2 SolarInfo Home APP Online Registration......................................120
11.3.3 Visit in “Remote [Login]”mode .....................................................121
12 Appendix...................................................................... 122
12.1 Technical Data .............................................................................122
12.2 Exclusion of Liability ....................................................................124
12.3 About Us......................................................................................125

1
1 Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS
The inverters have been designed and tested strictly according to the international
safety regulations. As electrical and electronic equipments, safety instructions
related to them must be complied with during installation, commissioning,
operat ion and maintenance. Incorrect operation or work may result in damage to
the life and well-being of the operator or a third party, or
the inverter and other properties that belong to the operator or a third party.
Therefore, the following general safety instruct ions 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 crit ical points in corresponding chapter.
All installation and electrical work must be performed only
by qualified
personnel. They have
been trained specially;
already read through and understood the manual
and other related
documents;
been familiar with safety requirements for electrical system.
Technical personnel mentioned above may perform the following work:
Install the inverter onto the wall.
Connect the inverter into the PV power system.
Connect other devices into the PV power system.
Commission the inverter.
Maintain and service the inverter.

1 Safety Instructions User Manual
2
Before Installation
There is a risk of injury due to improperly handling the device!
Always follow the instructions contained in the manual when moving and
positioning the inverter.
The weight of the equipment can cause injuries, serious wounds, or bruise if
improperly handled.
The device 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 anything
missing, contact the device dealer.
During Installation
Prior to installing the inverter onto the wall, it is crucial to make certain that
the inverter is not electrically connected.
System performance loss due to bad ventilation!
The device requires good ventilation during operation. It is essential to keep
the device upright and nothing covering the heat sink to ensure that the
device interior is well cooled down.
During Electrical Connection
All electrical connections must be conducted in accordance with local and
national standards.
Only with the permission of the local energy sector
, the inverter can be
connected into the utility grid.

User Manual 1 Safety Instruct ions
3
Lethal voltage!
PV arrays will produce electrical energy when exposed to sunlight and thus
can create an electrical shock hazard.
Wiring of the PV arrays should be performed only by qualified personnel.
All cables must be firmly attached, undamaged, properly insulated and
adequately dimensioned.
During Inverter Operation
Do not open the enclosure when the inverter is under voltage. There is a highly
unlikely risk of explosion in very specific cases of fault. The enclosure will protect
persons and property from such an explosion, only if it is correctly sealed.
There is a risk of inverter damage or personal injury!
DO NOT disconnect DC connectors while the inverter is under AC load! First
de-energize the device from dual power sources and then verify that there is
no voltage present.
There is a risk of burn!
DO NOT touch the device hot parts (such as heat sink) during operation. Only
LCD display panel and DC switch can be touched during inverter operation.
Maintenance and Service
Always keep in mind that the inverter is power supplied by dual power

1 Safety Instructions User Manual
4
sources: PV arrays and utility grid.
There is a risk of inverter damage or personnel injury due to incorrect service
work!
Before any service work, you should obey the following procedures.
Disconnect inverter from the utility grid first and then PV arrays;
Wait at least 10 minutes until the inner capacitors discharge completely;
Verify that no voltage and current present with appropriate testing device.
Keep non-related persons away!
A temporary warning sign and barrier must be posted to keep non-related
persons away for any period while performing
electrical connection and
service work.
Any fault that may impair the inverter safety functions must be repaired
immediately before the inverter is restarted.
Inverter contains no owner serviceable parts inside. Please contact local
authorized personnel if any service work is required.
Servicing of the device in accordance with the manual should never be
undertaken in the absence of proper tools, test equipments or more
recent revision of the manual which is clearly and thoroughly understood.
Only qualified personnel are allowed to open the top cover!
There is a risk of inverter damage if it is improperly serviced.
Use only accessories and spare parts approved by the inverter manufacturer.
Never modify the inverter or its components. Otherwise, it will cause loss of
any or all warranty rights.

User Manual 1 Safety Instruct ions
5
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 during replacement.
Others
The selected country settings can be changed only by service personnel!
Unauthorized alternation of the country settings is prohibited. Otherwise it
may cause a breach of the type-certificate marking.
All safety instructions, warning labels and nameplate on the inverter body:
Must be clearly visible;
Must not be removed, covered or pasted.
These regulations should also be followed:
The regulations related to the electricity fed into grid;
The safety instructions related to the PV arrays;
The safety instructions related to other electrical devices.

6
2 Product Introduction
2.1 Intended Usage
The inverters, which are 3-phase string inverters without transformer, are crucial
units between the PV strings and utility grid in the small-scaled PV power system.
Inverter is dedicated to converting the DC power generated by the PV modules into
AC power, which conforms to the parameters of local utility grid, and feeds the
alternating current into the utility grid. The intended usage of the inverter is
illustrated in Fig. 2-1.
By sett ing the upper limit of feed power, the inverter will run with power derating
once the meter detects that the output power is greater than the set value.
Any other or additional usage is not permitted except the intended usage.
Where the positive or negative terminal of PV strings needs to be grounded,
inverter cannot be connected to PV modules.
Grid Dispatch Center
K
Control signal
Household Load
A B
C D
E
F
Fig. 2-1 PV Power System
Item
Description
Remark
A
PV strings
Monocrystalline silicon, polycrystalline silicon, and
thin-film of protection class II without grounding.
B
Inverter
SG8KTL-EC, SG10KTL-EC and SG12KTL-EC.
C
Metering device
Meter cupboard with power distribution system.

User Manual 2 Product Introduct ion
7
Item
Description
Remark
D
Smart energy
meter (optional)
Three-phase electronic energy meter, used to measure
the active power output. Communicate with the inverter
via RS485 port.
E
Utility grid
TT, TN-C, TN-S, TN-C-S.
F
Household load
Household appliances.
2.2 Product Description
2.2.1 Inverter Appearance
3
1
2
MPPTs parallel
configuration!
4
10
6
5789
Fig. 2-2 Inverter Appearance
No.
Name
Description
1
LCD display panel
Human-computer interaction interface for looking up
running information and configuring parameters.
2
Side grips
The side grips are designed for holding the unit when
mounting, moving or servicing the inverter.
3
PV input parallel lid
(SG12KTL-EC)
There are two parallel blocks for PV input mode
configuration under the lid.
4
Ventilation holes
Ensure sufficient heat dissipation.
5
Handles
The handles are designed for transporting, installing
and dismantling the inverter.
6
AC connection
terminal
Inverter feeds power to utility grid via this terminal.
7
DC terminals
There are four pairs of DC terminals for PV input on
the bottom of the inverter.
8
DC switch
During normal operation it is in “ON” position. It can
shut down the inverter immediately in “OFF” position.

2 Product Introduct ion User Manual
8
No.
Name
Description
9
Communication
connection terminals
They are RS485 communication ports, Ethernet
communication ports and DI/DO ports.
10
Second PE terminal
As specified in EN 50178
2.2.2 Inverter Dimensions
Fig. 2-3 Outline Dimensions
Tab. 2-1 Dimension Values
Type
W(mm)
H(mm)
D(mm)
Net weight(kg)
SG8KTL-EC
535
710
220
36
SG10KTL-E
C
535
710
220
36
SG12KTL-E
C
535
710
220
45
2.2.3 LCD Display Panel
As a human-computer interaction interface, LCD display panel is on the front panel
and comprises LED indicators, buttons and LCD screen.
LED indicators indicate the working status of the inverter.
By pressing the buttons user can look up information and configure parameters.
LCD screen shows the current running informat ion.

User Manual 2 Product Introduct ion
9
Fig. 2-4 LCD Display Panel
No.
Name
Description
1
LED indicators
“RUN” and “FAULT”. The current state can be known from
the two indicators. Detailed definition is shown in Tab. 2-2.
2
Buttons
User can operate the LCD menu of the inverter via the two
buttons. Detailed function is shown in Tab. 10-1.
3
LCD Screen
LCD screen can display the current state, current running
information, historical information, and parameters to be
set.
Tab. 2-2 Description of LED Indicators
Name
State
Description
“RUN”
On
The inverter is feeding power to the utility grid or in derating
operation.
Blinking
The inverter is in the process of startup.
Off
Other states.
“FAULT
”
On
Communication error, permanent fault, or upgrade failure.
Blinking
Other faults (alarms excluded).
Off
No fault occurs.
2.3 Technical Description
2.3.1 Circuit Description
Fig. 2-5 shows the main circuit of inverter.
The boost circuits raise the input DC voltage. Two string MPP trackers can be ut ilized
to ensure the maximum power from PV arrays. Then the inverter circuit converts DC
power to AC power. Three-level inverter circuit converts the DC power into AC power,
which will be fed into the utility grid via AC terminal. Meanwhile inverter is equipped
with protective circuit to guarantee its safety operation which can trigger the AC
relay if required.
Addit ionally, a DC switch is integrated for safe disconnection of DC current. The
inverter provides RS485 ports and NET ports for communication. Users can look up
running data and set parameters through LCD display panel.

2 Product Introduct ion User Manual
10
+
DC Switch
DC
EMC
Filter
+
+
Three-level
Inverter Circuit
L1
L2
L3
N
PE
AC Relay
Grid
AC
EMC
Filter
AC
Reactor
+
-
-
MPPT1
(Boost)
MPPT2
(Boost)
DC
EMC
Filter
DC 1 DC 2
LCD Display Panel
Communication Interface RS485/Etherent
DC2
DC1
Fig. 2-5 Main Circuit Diagram of Inverter
2.3.2 Functions Description
Inverter functions can be grouped as the following:
Conversion function
Inverter converts the DC power into the AC power, which conforms to the grid
requirements of its installation country.
Data storage and display
Inverter archives essential data including running information and fault records,
and displays them on the integrated LCD display.
Parameters configuration
Inverter provides various parameters configuration for optimal operation.
Communication interfaces
RS485 serial communication with RJ45 ports (RS485-1 and RS485-2), Ethernet
communication with RJ45 ports (Net-1 and Net-2), DI and DO terminals.
Earth fault alarm
With the standard Ethernet interface equipped, the inverter can be connected to
the router via a network cable. Then both the inverter information and alarm
signals will be uploaded to the cloud server SolarInfo Bank. When the server
receives an earth fault signal, it will automatically send warning e-mail to the
registered user. Inverter also provides a dry-contact (DO1 relay) for the local alarm
of earth fault.
Zero export (0% feed-in funct ion, optional)
At the grid-connection point, the three-phase SUNGROW Energy Meter is used
for measuring the feed-in power. Enable the feed sett ing and set the limit value
via the LCD menu. Then the inverter will run with power derating once the meter
detects that the feed-in power is above the set value.

User Manual 2 Product Introduct ion
11
Protection funct ions include:
−Short circuit protection
−Insulation resistance detect ion and alarm
−Inverter output voltage monitoring
−Inverter output frequency monitoring
−Residual current monitoring
−DC injection of AC output current surveillance
−Anti-islanding protection
−DC over-voltage protection
−DC Over-current protection
−Power module over-temperature protection

12
3 Unpacking and Storing
3.1 Unpacking and Inspecting
The device is thoroughly tested and inspected before delivery. Although sturdy
packaging is used, damage may still occur during shipping.
If there is visible damage to the packaging or the inner contents, or anything missing,
contact the device dealer.
Do not dispose of the original packaging. It is the best choice to store the inverter in
the original packaging.
During unpacking, cut the green plast ic straps and lift the full upper-part of the
carton box. Do not cut the sticky tape.
Fig. 3-1 Single Inverter in Original Packaging Carton(unit: mm)
3.2 Moving the Inverter
In order to avoid damage to the inverter during moving, it is better to move inverter
in the original carton.
Pay attention to the weight. Proper device that can bear the weight is needed to
avoid inverter damage or person injury when moving.
When moving the inverter, please follow the symbol instructions on the
packaging box.