Sungrow SG25CX-SA User manual

SG25CX-SAPV
Grid-Connected InverterUser
ManualSG25CX-SA-UEN-Ver13-
202304
User Manual
PV Grid-Connected Inverter
SG25CX-SA
SG25CX-SA-UEN-Ver13-202304

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 Power Supply Co., Ltd.
All other trademarks or registered trademarks mentioned in this document 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.
Sungrow Power Supply Co., Ltd.
Address: No.1699 Xiyou Rd., New & High Tech Zone, Hefei, 230088, China.
Email: [e-mail]
Tel: [phone]
Website: www.sungrowpower.com

II
About This Manual
The manual mainly describes the product information, guidelines for installation, operation
and maintenance. The manual cannot include complete information about the photovoltaic
(PV) system. You can get additional information about other devices at www.
sungrowpower.com or on the webpage of the respective component manufacturer.
Validity
This manual is valid for the following inverter types:
• SG25CX-SA
They will be referred to as “inverter” hereinafter unless otherwise specified.
Target Group
This manual is intended for:
• qualified personnel who are responsible for the installation and commissioning of the
inverter; and
• inverter owners who will have the ability to interact with the inverter.
How to Use This Manual
Read the manual and other related documents before performing any work on the inverter is
carried out. Documents must be stored carefully and be available at all times.
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 website at www.sungrowpower.
com.
Symbols
Important instructions contained in this manual should be followed during installation,
operation and maintenance of the inverter. They will be highlighted by the following symbols.
Symbol Explanation
Indicates a hazard with a high level of risk that, if not avoided, will result
in death or serious injury.
Indicates a hazard with a medium level of risk that, if not avoided, could
result in death or serious injury.
Indicates a hazard with a low level of risk that, if not avoided, could
result in minor or moderate injury.
Indicates a situation that, if not avoided, could result in equipment or
property damage.
Indicates additional information, emphasized contents or tips that may
be helpful, e.g. to help you solve problems or save time.

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Contents
All Rights Reserved .....................................................................................................I
About This Manual......................................................................................................II
1 Safety .................................................................................................................1
1.1 PV Panels......................................................................................................1
1.2 Utility Grid ......................................................................................................1
1.3 Inverter ..........................................................................................................2
1.4 Skills of Qualified Personnel ............................................................................3
2 Product Introduction .........................................................................................4
2.1 Intended Usage..............................................................................................4
2.2 Product Introduction........................................................................................5
2.2.1 Model Description .................................................................................5
2.2.2 Appearance..........................................................................................6
2.2.3 Dimensions ..........................................................................................6
2.2.4 LED Indicator Panel ..............................................................................7
2.2.5 DC Switch ............................................................................................7
2.3 Circuit Diagram ..............................................................................................7
2.4 Function Description .......................................................................................8
3 Unpacking and Storage .................................................................................10
3.1 Unpacking and Inspection .............................................................................10
3.2 Identifying the Inverter ..................................................................................10
3.3 Scope of Delivery .........................................................................................12
3.4 Inverter Storage ...........................................................................................12
4 Mechanical Mounting .....................................................................................14
4.1 Safety during Mounting .................................................................................14
4.2 Location Requirements .................................................................................14
4.2.1 Installation Environment Requirements.................................................14
4.2.2 Carrier Requirements ..........................................................................15
4.2.3 Installation Angle Requirements ...........................................................15
4.2.4 Installation Clearance Requirements ....................................................16
4.3 Installation Tools...........................................................................................19
4.4 Moving the Inverter.......................................................................................20

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4.4.1 Manual Transport................................................................................20
4.4.2 Hoisting Transport...............................................................................20
4.5 Dimensions of mounting-bracket....................................................................21
4.6 PV Bracket-Mounted Installation....................................................................22
4.6.1 Preparation before Mounting................................................................22
4.6.2 Mounting Steps...................................................................................22
4.7 Wall-Mounted Installation ..............................................................................24
4.7.1 Preparation before Mounting................................................................24
4.7.2 Mounting Steps...................................................................................25
5 Electrical Connection .....................................................................................28
5.1 Safety Instructions........................................................................................28
5.2 Terminal Description .....................................................................................28
5.3 Electrical Connection Overview .....................................................................30
5.4 Additional Grounding Connection...................................................................31
5.4.1 Additional Grounding Requirements .....................................................31
5.4.2 Connection Procedure.........................................................................31
5.5 AC Cable Connection ...................................................................................32
5.5.1 AC Side Requirements ........................................................................32
5.5.2 Requirements for OT/DT Terminal ........................................................34
5.5.3 Aluminium Cable Requirements ...........................................................34
5.5.4 Connection Procedure.........................................................................35
5.6 DC Cable Connection ...................................................................................38
5.6.1 PV Input Configuration ........................................................................38
5.6.2 Connection Procedure.........................................................................39
5.6.3 Installing the PV Connectors ................................................................40
5.7 Communication Junction Box ........................................................................42
5.7.1 Remove the Junction Box ....................................................................42
5.7.2 Install the Junction Box........................................................................42
5.8 Communication Wiring Board ........................................................................43
5.9 RS485 Communication .................................................................................43
5.9.1 Interface Description ...........................................................................43
5.9.2 RS485 Communication System............................................................44
5.9.3 Connection Procedure(Terminal Block).................................................46
5.9.4 Connection Procedure (RJ45 network port)...........................................47
5.10 Dry Contact Connection ..............................................................................49
5.10.1 Dry Contact Function.........................................................................49
5.10.2 Wiring Procedure ..............................................................................51

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5.11 Wi-Fi Communication Module Connection ....................................................51
6 Commissioning ...............................................................................................53
6.1 Inspection before Commissioning ..................................................................53
6.2 Commissioning Procedure ............................................................................53
7 iSolarCloud App ..............................................................................................54
7.1 Brief Introduction ..........................................................................................54
7.2 Download and Install.....................................................................................54
7.3 Login ...........................................................................................................55
7.3.1 Requirements .....................................................................................55
7.3.2 Login Steps ........................................................................................55
7.4 Function Overview........................................................................................58
7.5 Home page ..................................................................................................58
7.6 Running Information .....................................................................................61
7.7 History Record .............................................................................................62
7.7.1 Fault Alarm Records............................................................................63
7.7.2 Power Yields Records .........................................................................64
7.7.3 Event Records ....................................................................................65
7.8 More............................................................................................................65
7.8.1 Parameter Setting ...............................................................................66
7.8.2 Firmware Update ................................................................................73
7.8.3 Password Changing ............................................................................74
8 System Decommissioning ............................................................................75
8.1 Disconnecting the Inverter.............................................................................75
8.2 Dismantling the Inverter ................................................................................75
8.3 Disposal of the Inverter .................................................................................76
9 Troubleshooting and Maintenance ..............................................................77
9.1 Troubleshooting ...........................................................................................77
9.2 Maintenance ................................................................................................85
9.2.1 Routine Maintenance ..........................................................................86
9.2.2 Maintenance Instruction.......................................................................86
10 Appendix .......................................................................................................89
10.1 Technical Data............................................................................................89
10.2 Wring Distance of DI Dry Contact.................................................................91
10.3 Quality Assurance ......................................................................................92
10.4 Contact Information ....................................................................................93

1
1Safety
The inverter has been designed and tested strictly according to international safety
regulations. Read all safety instructions carefully prior to any work and observe them at all
times when working on or with the inverter.
Incorrect operation or work may cause:
• injury or death to the operator or a third party.
• damage to the inverter and other property safety of the operator or a third party.
All detailed work-related safety warnings and notes will be specified at critical points in this
manual.
The safety instructions in this manual cannot cover all the precautions that should
be followed. Perform operations considering actual onsite conditions.
SUNGROW shall not be held liable for any damage caused by violation of the
safety instructions in this manual.
1.1 PV Panels
PV strings will produce electrical power when exposed to sunlight and can cause a
lethal voltage and an electric shock.
• Always keep in mind that the inverter is dual power supplied. Electrical
operators must wear proper personal protective equipment: helmet, insulated
footwear, glove, etc.
• Before touching the DC cables, operator must use a measuring device to
ensure that the cable is voltage-free.
• Follow all warnings on the PV strings and in its manual.
1.2 Utility Grid
Please follow the regulations related to the utility grid.
All electrical connections must be in accordance with local and national standards.
Only with the permission of the utility grid, the inverter can be connected to the
utility grid.

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1.3 Inverter
Danger to life from electric shocks due to live voltage
• Do not open the enclosure at any time. Unauthorized opening will void
guarantee and warranty claims and in most cases terminate the operating
license.
Risk of inverter damage or personal injury
• Do not pull out the PV connectors when the inverter is running.
• Wait at least 5 minutes for the internal capacitors to discharge. Ensure that
there is no voltage or current before pulling any connector.
All safety instructions, warning labels, and nameplate on the inverter:
• Must be clearly legible.
• Should not be removed or covered.
Risk of burns due to hot components!
Do not touch any hot parts (such as heat sink) during operation. Only the DC
switch can safely be touched at any time.
Only qualified personnel can perform the country setting.
• Unauthorized alteration of the country setting may cause a breach of the type-
certificate marking.
By touching the electronic components, you may damage the inverter. For inverter
handling, be sure to:
• avoid any unnecessary touching;and,
• wear a grounding wristband before touching any connectors.
1 Safety User Manual