KEHUA TECH SPI-B X2 Series User manual

PV Grid-tied Inverter
SPI-B X2 Series (8K-25K)
User Manual

All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
i
Copyright © Xiamen Kehua Digital Energy Tech Co., Ltd. 2022. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Xiamen Kehua Digital Energy Tech Co., Ltd.
Trademarks and Permissions
and other Kehua trademarks are the licensed trademarks of Xiamen Kehua Digital Energy Tech
Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Kehua and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specification in the contract, all
statements, information, and recommendations in this document are provided “AS IS”without warranties,
guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
XIAMEN KEHUA DIGITAL ENERGY TECH CO., LTD.
Address:
No.457,MalongRoad,TorchHigh-TechIndustrialZone,Xiamen,Fujian,China
Website:
www.kehua.com
E-mail:
[email protected]
Customer Service Telephone:
400-808-9986
Tel:
0592-5160516
Fax:
0592-5162166

Foreword
PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
ii
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
Foreword
Summaries
Thank you for choosing the PV grid-tied inverter (hereinafter referred to as inverter)!
This document gives a description of the inverter, including appearance, features, working principles,
installation, electrical connection, operation, maintenance and storage, etc.
Please save the manual after reading, in order to consult in the future.
The figures in this manual are just for reference, for details please see the actual product.
Applicable Model
SPI8K-B X2
SPI10K-B X2
SPI12K-B X2
SPI15K-B X2
SPI17K-B X2
SPI20K-B X2
SPI23K-B X2
SPI25K-B X2
SPI25K-B X2P
Symbol Conventions
The manual quotes the safety symbols, these symbols used to prompt users to comply with safety
matters during installation, operation and maintenance. Safety symbol meaning as follows.

PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
Foreword
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
iii
Symbol
Description
Alerts you to a high risk hazard that will, if not avoided, result in
serious injury or death.
Alerts you to a medium low risk hazard that could, if not avoided,
result in moderate or minor injury.
Alerts you to a low risk hazard that could, if not avoided, result in
minor injury.
Anti-static prompting.
Be care electric shock prompting.
Provides a tip that may help you solve a problem or save time.
Provides additional information to emphasize or supplement
important points in the main text.
Product standard: Q/XMHS 003

Contents
PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
iv
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
Contents
1 Safety Description.........................................................................................................................1
1.1 Safety Announcements.....................................................................................................................................1
1.1.1 Use Announcements................................................................................................................................1
1.1.2 PV String Protection ...............................................................................................................................2
1.1.3 ESD Protection........................................................................................................................................3
1.1.4 Grounding Requirements........................................................................................................................3
1.1.5 Moistureproof Protection........................................................................................................................3
1.1.6 Warning Mark Setting.............................................................................................................................4
1.1.7 Electrical Connection..............................................................................................................................4
1.1.8 Measurement Under Operation...............................................................................................................4
1.2 Operator Requirements ....................................................................................................................................5
1.3 Operation Environment Requirements.............................................................................................................5
2 Overview.........................................................................................................................................6
2.1 Product Intro.....................................................................................................................................................6
2.1.1 Model Meaning.......................................................................................................................................7
2.1.2 Features...................................................................................................................................................7
2.2 Apperance and Structure ..................................................................................................................................8
2.2.1 LED Indicator .........................................................................................................................................8
2.2.2 External Terminal Illustration .................................................................................................................9
2.3 Working Principle...........................................................................................................................................10
3 Installation....................................................................................................................................11
3.1 Installation Process......................................................................................................................................... 11
3.2 Installation Preparation .................................................................................................................................. 11
3.2.1 Installation Tools................................................................................................................................... 11

PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
Contents
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
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3.2.2 Installation Environment.......................................................................................................................12
3.2.3 Installation Clearance............................................................................................................................13
3.2.4 Installation Method...............................................................................................................................14
3.3 Transportation and Unpacking .......................................................................................................................14
3.3.1 Transportation.......................................................................................................................................14
3.3.2 Unpacking and Checking......................................................................................................................14
3.4 Inverter Installation........................................................................................................................................15
3.5 Electrical Connection.....................................................................................................................................19
3.5.1 Wire Requirements................................................................................................................................19
3.5.2 External Grounding Connection ...........................................................................................................19
3.5.3 PV String Input Wiring.........................................................................................................................21
3.5.4 AC Output Wiring.................................................................................................................................24
3.5.5 WIFI/4G Communication Connection..................................................................................................27
3.5.6 COM. Communication Connection (Optional).....................................................................................28
3.6 Check the Installation.....................................................................................................................................31
4 Startup and Shutdown ...............................................................................................................32
4.1 Check Before Startup.....................................................................................................................................32
4.2 Start Inverter...................................................................................................................................................32
4.3 Shut Down Inverter........................................................................................................................................33
5 Maintenance and Troubleshooting .........................................................................................34
5.1 Maintenance...................................................................................................................................................34
5.1.1 Inverter Maintenance ............................................................................................................................34
5.1.2 Fan Maintenance...................................................................................................................................35
5.2 Troubleshooting..............................................................................................................................................36
6 Stop Running, Dismantle, Discard Inverter..........................................................................39
6.1 Stop Running..................................................................................................................................................39
6.2 Dismantle the Inverter....................................................................................................................................40
6.3 Discard the Inverter........................................................................................................................................40
7 Package, Transportation, Storage.............................................................................................41

Contents
PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
vi
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
7.1 Package ..........................................................................................................................................................41
7.2 Transportation ................................................................................................................................................41
7.3 Storage ...........................................................................................................................................................41
A Technical Specifications ...........................................................................................................42
B Acronyms and Abbreviations ..................................................................................................48

PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
1 Safety Description
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
1
1 Safety Description
This chapter mainly introduces the safety announcements. Prior to performing any work on the
device, please read the user manual carefully, follow the operation and installation instructions and
observe all danger, warning and safety information.
1.1 Safety Announcements
This section mainly describes the safety announcements when operation and maintenance. For details,
please refer to safety description in relevant chapters.
Before operation, please read the announcements and operation instructions in this section carefully
to avoid accident.
The promptings in the user manual, such as "Danger", "Warning", "Caution", etc. don't include all
safety announcements. They are just only the supplement of safety announcements when operation.
Any device damage caused by violating the general safety operation requirements or safety standards
of design, production, and usage will be out of Kehua's guarantee range.
1.1.1 Use Announcements
Don't touch terminals or conductors that connected with grid to avoid lethal risk!

1 Safety Description
PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual
2
All rights reserved ©Xiamen Kehua Digital Energy Tech Co., Ltd.
There is no operational part inside the inverter. Please do not open the crust of the inverter by
yourself, or it may cause electric shock. The device damage caused by illegal operation is out of the
guarantee range.
After disconnect the input and output of the inverter, there still has residual energy in the storage
capacitor, which may cause electric shock. Do not perform the maintenance until all power sources
are switched off for 20 minutes and check that there is no voltage and current in the inverter by the
detection equipment.
The surface temperature of the inverter may reach to 75℃. During running, please don't touch the
surface to avoid scald.
No liquid or other objects are allowed to enter the inverter, or, it may cause inverter damage.
In case of fire, please use dry power fire extinguisher. If using liquid fire extinguisher, it may cause
electric shock.
1.1.2 PV String Protection
When install PV string in daytime, it necessary to cover the PV string by light-proof material, or the
PV string will generate high voltage under sunshine. If touching PV string accidently, it may cause
electric shock or human injury!