Sungrow SG1100UD Series User guide

SG1100UD/
SG1100UD-20/SG3300UD/
SG3300UD-20/SG4400UD/
SG4400UD-20PV Grid-Connected
InverterSystem ManualSG1100_
3300_4400UD–20-SEN-Ver24-
202401M-D-000577
System Manual
PV Grid-Connected Inverter
SG1100UD/SG1100UD-20/SG3300UD/SG3300UD-20/
SG4400UD/SG4400UD-20
SG1100_3300_4400UD–20-SEN-Ver24-202401

I
All Rights Reserved
All Rights Reserved
No part of this document can be reproduced in any form or by any means without the prior
written permission of Sungrow Power Supply Co., Ltd (hereinafter "SUNGROW").
Trademarks
and other Sungrow trademarks used in this manual are owned by
SUNGROW.
All other trademarks or registered trademarks mentioned in this manual are owned by their
respective owners.
Software Licenses
• It is prohibited to use data contained in firmware or software developed by SUNGROW,
in part or in full, for commercial purposes by any means.
• It is prohibited to perform reverse engineering, cracking, or any other operations that
compromise the original program design of the software developed by SUNGROW.

III
Contents
All Rights Reserved .....................................................................................................I
1 About This Manual ...........................................................................................1
1.1 Validity...........................................................................................................1
1.2 Target Group..................................................................................................1
1.3 How to Use This Manual .................................................................................1
1.4 Symbol Explanations ......................................................................................2
1.5 Explanation of Description...............................................................................2
2 Safety Instructions ............................................................................................3
2.1 Unpacking and Inspection ...............................................................................4
2.2 Hoisting and Transportation.............................................................................5
2.3 Electrical Connection ......................................................................................5
2.4 Operation.......................................................................................................7
2.5 Operation and Maintenance ............................................................................7
2.6 Disposal ........................................................................................................9
3 Product Description ........................................................................................10
3.1 Product Introduction......................................................................................10
3.2 Product Composition ....................................................................................10
3.3 Main Internal Equipment ...............................................................................12
3.3.1 Appearance of Inverter Unit .................................................................12
3.3.2 Internal Structure of Inverter Unit..........................................................13
3.4 Symbol on Products......................................................................................14
4 Transport and Storage ...................................................................................16
4.1 Precautions..................................................................................................16
4.2 Transportation Requirements ........................................................................16
4.3 Storage Requirements ..................................................................................16
4.3.1 Storage Environment...........................................................................16
4.3.2 Protection During Storage....................................................................17
4.3.3 Routine Inspection for Long-term Storage .............................................17
5 Mechanical Mounting .....................................................................................18
5.1 Safety Precautions .......................................................................................18
5.2 Inspection Before Installation.........................................................................19

IV
5.2.1 Scope of Delivery................................................................................19
5.2.2 Product Inspection ..............................................................................20
5.3 Installation Environment Requirements ..........................................................20
5.3.1 Installation Site ...................................................................................20
5.3.2 Foundation .........................................................................................20
5.3.3 Space Requirements...........................................................................21
5.4 Hoisting and Fixing .......................................................................................23
5.4.1 Preparation Before Hoisting .................................................................23
5.4.2 Crane and Sling Requirements.............................................................23
5.4.3 During Hoisting ...................................................................................24
5.4.4 Fixing.................................................................................................26
6 Electrical Connection .....................................................................................27
6.1 Precautions..................................................................................................27
6.2 Wiring Overview ...........................................................................................29
6.3 Preparation Before Wiring .............................................................................29
6.3.1 Installation Tools .................................................................................29
6.3.2 Open the Product Door........................................................................30
6.3.3 Cables ...............................................................................................31
6.3.4 Position of Cable Inlet..........................................................................31
6.3.4.1 Cable Inlet Preparation ..............................................................32
6.4 Ground Connection ......................................................................................34
6.4.1 Overview............................................................................................35
6.4.2 Grounding Flat Steel ...........................................................................35
6.4.3 Grounding Cable.................................................................................36
6.5 DC Input Connection.....................................................................................36
6.5.1 Overview............................................................................................37
6.5.2 Installing Insulation Board before Connection ........................................38
6.5.3 Procedure ..........................................................................................39
6.5.4 Securing Cables .................................................................................41
6.6 AC Side Connection .....................................................................................42
6.6.1 Inspection Before Wiring......................................................................42
6.6.2 AC Connection Area at the Bottom .......................................................43
6.6.3 AC Connection Area on the Side ..........................................................43
6.7 Communication Wiring..................................................................................45
6.7.1 RS485 Communication........................................................................46
6.7.2 Ethernet Communication .....................................................................47
6.8 Check After Wiring........................................................................................47

V
6.8.1 Inspection ..........................................................................................47
6.8.2 Locking Cabinet Door..........................................................................48
7 Powering up and Powering down ................................................................49
7.1 Safety Instructions........................................................................................49
7.2 Powering Up Operations ...............................................................................49
7.2.1 Removing Film on Product...................................................................49
7.2.2 Removing Pressure Relief Screw .........................................................50
7.2.3 Installing Fuse in AC SPD....................................................................50
7.3 Inspection Before Powering Up......................................................................51
7.3.1 Inverter...............................................................................................51
7.3.2 PV Array.............................................................................................51
7.3.3 Checking Grid Voltage.........................................................................51
7.4 Powering Up Steps.......................................................................................51
7.5 Powering Down Operations ...........................................................................52
7.5.1 Planned Powering Down......................................................................52
7.5.2 Unplanned (Emergency) Powering Down..............................................52
8 O&M on WEB ..................................................................................................54
8.1 Communications Diagram .............................................................................54
8.2 Preparation Before Login ..............................................................................55
8.2.1 Login (PC) ..........................................................................................55
8.2.2 Login (Mobile Device)..........................................................................55
8.3 Login Steps..................................................................................................56
8.4 Interface Introduction ....................................................................................56
8.4.1 Homepage..........................................................................................56
8.4.2 Viewing Fault Information ....................................................................57
8.4.3 Viewing Alarm Information ...................................................................57
8.4.4 Boot/Shutdown ...................................................................................57
8.4.5 Setting Initial Parameters.....................................................................57
8.4.6 Setting Operation Parameters .............................................................. 58
8.4.7 Setting Protection Parameters..............................................................58
8.5 Modifying Password......................................................................................58
8.6 Logout .........................................................................................................58
9 O&M on iSolarCloud App ..............................................................................59
9.1 About iSolarCloud ........................................................................................59
9.2 Function Overview........................................................................................59
9.3 Download and Installation .............................................................................59

VI
9.4 Login ...........................................................................................................60
9.4.1 Requirements .....................................................................................60
9.4.2 Login Steps ........................................................................................61
9.5 Home ..........................................................................................................64
9.6 Run Information............................................................................................66
9.7 Records.......................................................................................................67
9.8 More............................................................................................................69
9.8.1 Boot/Shutdown ...................................................................................69
9.8.2 Modify Password.................................................................................70
10 LCD Menu Operation (Optional) ................................................................71
10.1 LCD TouchScreen ......................................................................................71
10.2 Default Screen ...........................................................................................71
10.2.1 Initialization.......................................................................................71
10.2.2 Default Screen Introduction................................................................71
10.2.3 Backlight and Screensaver.................................................................72
10.3 Overview of Submenu and Icon ...................................................................72
10.4 Setting Language .......................................................................................72
10.5 Setting Control Mode ..................................................................................73
11 Troubleshooting ............................................................................................74
11.1 Inverter Troubleshooting..............................................................................74
11.1.1 Viewing Fault/Alarm Information .........................................................74
11.1.2 Check Method...................................................................................74
11.2 Other Faults ...............................................................................................86
12 Routine Maintenance ..................................................................................88
12.1 Safety Instructions ......................................................................................88
12.2 Maintenance Period....................................................................................90
12.2.1 Maintenance (Every two years) ..........................................................90
12.2.2 Maintenance (Once A Year) ...............................................................91
12.2.3 Maintenance (Every half a year to once a year) ...................................92
12.3 Common Maintenance Items .......................................................................93
12.3.1 Cleaning Air Inlet of Inverter ...............................................................93
12.3.2 Cleaning Air Outlet of Inverter ............................................................94
12.3.2.1 With Connection Area at the Bottom..........................................94
12.3.2.2 With Connection Area on the Side.............................................95
12.3.3 Appearance Repair ...........................................................................95
12.3.3.1 Erasable Traces ......................................................................95

VII
12.3.3.2 Indelible Traces .......................................................................96
12.3.3.3 Broken Primer .........................................................................96
12.3.4 Checking Door Locks and Hinges .......................................................97
12.3.5 Checking Sealing Strips.....................................................................97
12.4 Replacing Fuse ..........................................................................................97
12.4.1 Replacing DC Side Fuse....................................................................98
13 Appendix .......................................................................................................99
13.1 Technical Parameters .................................................................................99
13.2 Tightening Torques ...................................................................................104
13.3 Quality Assurance ....................................................................................105
13.4 Contact Information ..................................................................................105