Sungrow SG1K5TL-31 User manual

I
About This Manual
Thank you for purchasing the inverter SG1K5TL-31 from Sungrow.We hope that the
device will meet your satisfaction when you use it with your PV plant system.
Aim
This manual contains detailed product information, operation instructions and safety
instructions that must be understood and obeyed during installation and maintenance
of the inverter.
Target Readers
The manual is provided to people who need to install and operate the grid-connected
inverter.
How to Use This Manual
Read this manual and other documents before any work with inverter.
The document must be stored with other documents and be available at all times.
The contents of this manual will be periodically updated or revised if necessary.
However discrepancies cannot be excluded. Please refer to the actual product.
The latest version is available online at www.sungrowpower.com or from the usual
sales channels. Any suggestion, question or criticism is always welcome.
No part of this document may be reproduced, stored in a retrieval system or
transmitted, in any form or by any means, electronic, mechanical, photographic,
magnetic or otherwise, without the prior written permission of Sungrow.

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 these
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.

1
Contents
SAFETYANDPRODUCTINFORMATION ................................................................ 1
1 Safety Instructions ................................................................................................. 3
2 Product Introduction.............................................................................................. 9
2.1 Intended Usage .............................................................................................................................. 10
2.2 Principle Description ........................................................................................................................11
2.3 Product Description ........................................................................................................................ 12
2.3.1 Product Appearance............................................................................................................... 12
2.3.2 Dimensions and Weight of Inverter ........................................................................................ 13
2.3.3 LCD Display Panel ................................................................................................................. 13
2.3.4 DC Switch............................................................................................................................... 14
INSTALLATIONANDMAINTENANCEINFORMATION ....................................... 15
3 Installation Flow................................................................................................... 17
4 Installing Inverter onto Wall.............................................................................. 19
4.1 Unpacking and Inspection .............................................................................................................. 20
4.2 Nameplate ...................................................................................................................................... 21
4.3 Delivery Contents ........................................................................................................................... 22
4.4 Storage of Inverter .......................................................................................................................... 23
4.5 Selecting Installation Location ........................................................................................................ 23
4.6 Moving Inverter ............................................................................................................................... 26
4.7 Installation Procedure ..................................................................................................................... 27
5 Electrical Connection ........................................................................................... 29
5.1 General Safety Instruction .............................................................................................................. 30
5.2 Terminals Description ..................................................................................................................... 31
5.3 Specifications of Cables.................................................................................................................. 31
5.4 Overview of Electrical Connection.................................................................................................. 32
5.5 Connecting Inverter to PV Arrays ................................................................................................... 33
5.5.1 Safety ..................................................................................................................................... 33
5.5.2 Assembling DC Cable to Connector....................................................................................... 34
5.5.3 DC Wiring Procedure ............................................................................................................. 35
5.6 Connecting Inverter to AC Grid....................................................................................................... 36

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5.6.1 Safety ..................................................................................................................................... 36
5.6.2 Assembling AC Cables to Connector ..................................................................................... 38
5.6.3 AC Wiring Procedure.............................................................................................................. 39
5.7 Grounding of Inverter...................................................................................................................... 40
5.8 Disconnection of Inverter ................................................................................................................ 41
5.9 Connecting Communication Cable ................................................................................................. 42
5.9.1 Monitoring System.................................................................................................................. 42
5.9.2 Connecting RS485 Cable....................................................................................................... 43
6 Commissioning ..................................................................................................... 45
6.1 Verify before Commissioning.......................................................................................................... 46
6.2 Commissioning Procedure.............................................................................................................. 46
7 Troubleshooting ................................................................................................... 47
7.1 Troubleshooting of LED Indicator ................................................................................................... 48
7.2 Troubleshooting of Faults in LCD Screen....................................................................................... 49
OPERATIONINFORMATION................................................................................... 51
8 Operation of LCD Menu ..................................................................................... 53
8.1 Description of Button Function ....................................................................................................... 54
8.2 Operation Mode of Inverter............................................................................................................. 54
8.3 Overview of LCD Menu................................................................................................................... 55
8.4 Contrast Adjustment ....................................................................................................................... 56
8.5 Current Running Information .......................................................................................................... 56
8.6 Total Information ............................................................................................................................. 58
8.7 Fault Record ................................................................................................................................... 59
8.8 Parameters Configuration............................................................................................................... 60
8.8.1 Language Settings ................................................................................................................. 60
8.8.2 Time Settings.......................................................................................................................... 61
8.8.3 Deviation of Energy Settings.................................................................................................. 62
8.8.4 Load Default ........................................................................................................................... 63
8.8.5 Firmware Version ................................................................................................................... 64
8.8.6 Protective Parameters Settings.............................................................................................. 65
8.8.7 Communication Parameters Settings..................................................................................... 66
8.9 Inverter Start and Stop .................................................................................................................... 67
APPENDIX.................................................................................................................. 69
Technical Data...................................................................................................................................... 69
Exclusion of Liability............................................................................................................................. 71
About Us............................................................................................................................................... 72
Contact Information .............................................................................................................................. 72

1
SAFETYANDPRODUCTINFORMATION
FOR INSTALLER AND USER

2

3
1 Safety Instructions
About This Chapter
This chapter provides crucial safety instructions about SG1K5TL-31. Please read
“Safety Instructions” carefully before any work with inverter.

SG1K5TL-31 User Manual
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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Inverter SG1K5TL-31 has been designed and tested strictly according to the
international safety regulations. However, for electrical and electronic equipment,
safety instructions related to electrical device must be complied with during installation,
commissioning, operation and maintenance. Operation or work performed incorrectly
may result in damage to:
zThe life and well-being of the operator or a third party
zThe inverter and other properties that belong to the operator or a third party
Therefore in order to reduce the risk of personal injury, inverter damage or other
properties damage, 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 installation and electrical work must only be performed by qualified
personnel. They have
zbeen trained specially;
zalready completely read through and understood the manual and other
related documents;
zbeen familiar with safety requirements for electrical system.
Technical personnel mentioned above may perform the following work:
zInstall the inverter onto the wall
zConnect inverter into the PV power system
zConnect other devices into the PV power system
zCommission the inverter
zMaintain and service the inverter

Safety Instructions 1
5
Before Installation
There is a risk of injury due to improperly handling the device!
zAlways follow the instructions contained in the manual when moving and
positioning the inverter.
zThe weight of the equipment can cause injuries, serious wounds, or
bruising if it is not handled correctly.
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 equipment requires good quality ventilation during operation. It is essential
to keep the unit upright and nothing covering the heat sink in order to ensure
that the equipment interior is well cooled down.
During Electrical Connection
Lethal voltage exists!
PV arrays will produce electrical energy when exposed to sunlight and thus can
create an electrical shock hazard.
zWiring of the PV arrays should only be performed by qualified personnel.
zPV modules should be covered by opaque materials during wiring.
All cables must be firmly attached, undamaged, properly insulated and
adequately dimensioned.

SG1K5TL-31 User Manual
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During Inverter Operation
There is a risk of inverter’s damage or personal injury!
Do not disconnect DC connectors while the inverter is under AC load! First
de-energize the equipment from dual power sources and verify that there is no
voltage present.
There is a risk of burn!
Prevent from touching 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
zAny malfunction that may impair inverter safety functions must be repaired
immediately before the inverter is restarted again.
zInverter 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 and the more recent revision to the
manual which is clearly and thoroughly understood.

Safety Instructions 1
7
There is a risk of inverter damage or personnel injury due to incorrect service
work!
Always keep in mind that inverter is power supplied by dual power source: PV
arrays and utility grid.
Before any service work, you should obey the following procedures.
zDisconnect inverter from the utility grid side first and then PV arrays;
zWait at least ten minutes for inner capacitors discharge completely;
zVerify that no voltage and current present with appropriate testing device.
Keep non-related person away!
A temporary warning sign and barrier must be posted to keep non-related
person away for any period while performing electrical connection and service
work.
Do not open the enclosure when the inverter is under voltage. There is a highly
unlikely risk of explosion in very specific cases of malfunction. The housing will protect
persons and property from such an explosion, only if it is correctly sealed.
There is a risk of inverter damage if it is improperly serviced.
Use only accessories and spare parts approved by the inverter manufacturer.
And never modify the inverter or other components of the inverter. Otherwise it
will lead to loss of any and all warranty rights.
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. Do not
touch the boards unnecessarily during replacement.

SG1K5TL-31 User Manual
8
Others
The selected country settings can be changed by service personnel only!
Unauthorized access to country settings should be prohibited. Alternation of
the country settings may cause a breach of the type-certificate marking.
All safety instructions, warning labels and nameplate on the inverter body:
zMust be clearly visible;
zMust not be removed, covered and pasted.
These regulations should also be followed:
zThe regulations related to the electricity fed into grid;
zThe safety instructions related to PV arrays;
zThe safety instructions related to other electrical device.

9
2 Product Introduction
About This Chapter
This chapter introduces intended use, main circuits and constituent parts of the
inverter SG1K5TL-31.

SG1K5TL-31 User Manual
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2.1 Intended Usage
SG1K5TL-31 is robust, grid-connected, transformer-less and of high conversion
efficiency.
SG1K5TL-31 inverter converts DC power generated from the PV arrays into stable AC
current, and then directly feeds the AC power into the utility grid. It is a crucial unit in
the small-scaled PV power system. An example about intended usage of the inverter
is shown in Fig 2-1.
Where PV arrays need to be grounded of the positive or negative terminal,
SG1K5TL-31 inverter must not be connected in this kind of PV power system.
Fig 2-1 Inverter Applied in the PV Power System
Item Description
A PV arrays
B Inverter SG1K5TL-31
C Metering device
D Utility grid
Any other or additional usage is not permitted except the intended use.
The inverter must only be connected to a public utility grid. Local loads (home
appliance, lights, motor loads, etc.) can not be connected between the inverter
and the AC circuit breaker.

Product Introduction 2
11
2.2 Principle Description
The principle design of the SG1K5TL-31--a transformer-less and grid-connected
inverter can be known from the block diagram Fig 2-2.
The PV array voltage connected to the inverter input is always positive and is initially
regulated by the Boost circuit and then converted into alternating current by the full
bridge circuit inverter. The AC connection to the local utility grid is via 3 wires for a
single phase feed point.
Additionally, there is a MPP tracker to ensure that maximum power from PV array can
be utilized. Inside the inverter protective circuit to can trigger AC relay if required for
guaranteeing inverter safely operation and person.
Inverter provides standard interface RS485 for communication. User can look up
running data and configure parameters through human-computer interaction interface
--LCD display panel.
Fig 2-2 Main Circuit Diagram of SG1K5TL-31

SG1K5TL-31 User Manual
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2.3 Product Description
2.3.1 Product Appearance
Fig 2-3 Product Description
Item Name Description
1 LCD display panel
A friendly human-computer interaction interface. Running data and
configuration parameters are displayed in the LCD screen.
2 AC terminal Inverter feeds power via this terminal.
3 RS485 terminal Standard communication interface.
4 DC terminal Interface between inverter and PV arrays.
5 DC switch Optional component. Disconnect DC current safely.
6 Mounting ear Hang up the inverter onto the backplate via this mounting ear.

Product Introduction 2
13
2.3.2 Dimensions and Weight of Inverter
D
W
H
Fig 2-4 Dimensions of Inverter
Table 2-1 Dimensions Value
Type W(mm) H(mm) D(mm) Net weight(kg)
SG1K5TL-31 318 460 151 14
2.3.3 LCD Display Panel
As a friendly human-computer interface, LCD display panel comprises LED indicators,
buttons and LCD screen.
zLEDs indicate the current state of the inverter
zThe current running information shown in the LCD screen
zMalfunction records shown in the LCD screen
zInverter configuration by pressing the buttons
Fig 2-5 LCD Display Panel

SG1K5TL-31 User Manual
14
Item Name Description
1 LCD
screen
LCD screen can display the current state of inverter, current running
information, history information and parameters to be set.
2 Buttons
User can operate the LCD menu of the inverter via the two buttons.
Detailed function is shown in Table 8-1.
3 LED
indicators
They are “RUN” and “FAULT”. User can observe two indicators to get
the current state of inverter. Detailed definition is shown in Table 2-2.
Table 2-2 Description of LED Indicators
Name State Description
“RUN” On Inverter is running.
Off Inverter is not running.
“FAULT” On A malfunction occurs.
Off A malfunction doesn’t occur.
The background illumination of LCD screen will go out to save power if there is not
button operation in one minute. You can activate it by pressing any button.
2.3.4 DC Switch
The DC switch is designed for safely disconnecting the DC current if required.
The inverter works automatically if input and output meet the requirements. If you
want to interrupt running or if a malfunction occurs, it can be rotated to the “OFF”
position and then the inverter will cease.
Rotate the DC switch to the “ON” position again before restarting the inverter.