KEHUA TECH iStoragE3 Series User manual

i
iStoragE3 Series
Energy Storage System
User Manual

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:
Room 208-38, Hengye Building, No. 100 Xiangxing Road, Torch High-tech
Zone (Xiang'an) Industrial Zone, Xiamen, China
Website:
www.kehua.com
E-mail:
[email protected]
Customer Service Telephone:
400-808-9986
Tel:
0592-5160516
Fax:
0592-5162166

Foreword
iStoragE3 Series Energy Storage System
User Manual
ii
Foreword
Summaries
Thank you for choosing the iStoragE3 series energy storage system (hereinafter referred to as
iStoragE3)!
This document gives a description of the iStoragE3 series energy storage system, including the
features, performance, appearance, structure, working principles, installation, operation and
maintenance. 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.
Suitable Model
Inverter
−iStoragE3 5K
−iStoragE3 6K
−iStoragE3 8K
−iStoragE3 10K
−iStoragE3 12K
Battery pack
−iStoragE B5-S2
The iStoragE3 series energy storage system consists of inverter and battery.
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.

iStoragE3 Series Energy Storage System
User Manual
Foreword
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.

Contents
iStoragE3 Series Energy Storage System
User Manual
iv
Contents
1 Safety Description.........................................................................................................................1
1.1 Safety Announcements.....................................................................................................................................1
1.1.1 Use Announcements................................................................................................................................1
1.1.2 Inverter Symbol Illustration....................................................................................................................3
1.1.3 Protection for PVArray ..........................................................................................................................3
1.1.4 ESD Protection........................................................................................................................................4
1.1.5 Grounding Requirements........................................................................................................................4
1.1.6 Moisture-proof Protection.......................................................................................................................4
1.1.7 Safety Warning Label Setting .................................................................................................................5
1.1.8 Electrical Connection..............................................................................................................................5
1.1.9 Measurement Under Operation...............................................................................................................5
1.2 Safety Precaution for Battery Pack ..................................................................................................................6
1.2.1 General Safety Precautions.....................................................................................................................6
1.2.2 Response to Emergency Situations.........................................................................................................6
1.3 Requirements for Operator...............................................................................................................................7
2 Overview.........................................................................................................................................8
2.1 Product Intro.....................................................................................................................................................8
2.1.1 Model Meaning.......................................................................................................................................9
2.1.2 Working Mode ......................................................................................................................................10
2.2 Appearance.....................................................................................................................................................12
2.2.1 Inverter..................................................................................................................................................12
2.2.2 Battery Pack..........................................................................................................................................13
2.3 Structure Layout.............................................................................................................................................14
2.3.1 Inverter..................................................................................................................................................14

iStoragE3 Series Energy Storage System
User Manual
Contents
v
2.3.2 Battery Pack..........................................................................................................................................16
2.4 Size.................................................................................................................................................................16
2.5 Heat Dissipation Illustration...........................................................................................................................17
2.6 Application Scenarios.....................................................................................................................................18
3 Installation....................................................................................................................................20
3.1 Installation Process.........................................................................................................................................20
3.2 Installation Preparation ..................................................................................................................................21
3.2.1 Tools......................................................................................................................................................21
3.2.2 Installation Environment.......................................................................................................................22
3.2.3 Installation Space..................................................................................................................................23
3.3 Transportation and Unpacking .......................................................................................................................23
3.3.1 Transportation.......................................................................................................................................23
3.3.2 Unpacking and Checking......................................................................................................................24
3.4 Mechanical Installation..................................................................................................................................25
3.5 Electrical Connection.....................................................................................................................................37
3.5.1 Wire Specification.................................................................................................................................37
3.5.2 External Grounding Connection ...........................................................................................................37
3.5.3 DC Input (PV) Connection ...................................................................................................................39
3.5.4 Grid Connection....................................................................................................................................42
3.5.5 Load Connection...................................................................................................................................45
3.5.6 WIFI/4G Connection.............................................................................................................................47
3.5.7 Communication Connection .................................................................................................................48
3.6 Installation Side Cover Plates ........................................................................................................................50
3.7 Check the Installation.....................................................................................................................................51
4 APP Operation.............................................................................................................................52
4.1 First Startup....................................................................................................................................................52
4.2 Inverter Information Query............................................................................................................................54
4.2.1 Running Information.............................................................................................................................56
4.2.2 Status Information.................................................................................................................................63
4.3 Control Interface ............................................................................................................................................64

Contents
iStoragE3 Series Energy Storage System
User Manual
vi
4.3.1 Basic Parameter Setting........................................................................................................................64
4.3.2 System Setting ......................................................................................................................................69
4.3.3 Battery Setting ......................................................................................................................................70
4.3.4 Grid Setting...........................................................................................................................................70
5 Startup and Shutdown ...............................................................................................................71
5.1 Startup............................................................................................................................................................71
5.2 CEI Self-Check ..............................................................................................................................................72
5.3 Shutdown .......................................................................................................................................................75
6 Maintenance and Troubleshooting .........................................................................................76
6.1 Maintenance...................................................................................................................................................76
6.2 Troubleshooting..............................................................................................................................................77
7 Package, Transportation and Storage......................................................................................88
7.1 Package ..........................................................................................................................................................88
7.2 Transportation ................................................................................................................................................88
7.3 Storage ...........................................................................................................................................................88
A Technical Specifications ...........................................................................................................90
B Acronyms and Abbreviations ..................................................................................................95

iStoragE3 Series Energy Storage System
User Manual
1 Safety Description
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
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
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 inverter damage caused by illegal operation is out of the
guarantee range.

1 Safety Description
iStoragE3 Series Energy Storage System
User Manual
2
Don't touch terminals or conductors that connected with grid to avoid lethal risk!
Damaged device or device fault may cause electric shock or fire!
Before operation, please check if the inverter is damaged or has other danger.
Check if the external device or circuit connection is safe.
Before checking or maintenance, if the DC side and AC side is power down just now, it is necessary
to wait for 5 minutes to ensure the inner device is completely discharged, and then the operation can
be performed.
The surface temperature of the inverter may reach to 80℃. During running, please don't touch the
surface to avoid scald.
No liquid or other objects are allowed to enter iStoragE3, or, it may cause iStoragE3 series energy
storage system damage.
In case fire, please use dry power fire extinguisher. If using liquid fire extinguisher, it may cause
electric shock.