Weco HeSU 4K4-R19/4 User manual

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-1
48V Household Energy Storage System UNIVERSAL 4K4
Product manual HESU Max 5 units in Parallel Max 5 Clusters
Model type HeSU UNIVERSAL STACKABLE UNITS
BMS-CAN V3.0
Version
：
V1.07.1-November 2019

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-2

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-3
.
ATTENTION: The battery can explode under heavy impact.
ATTENTION: The batteries weight exceeds 25kg. Appropriate mechanical lifting equipment
must be used.
ATTENTION: The battery can explode and must not be exposed to open flames or other
extreme sources of heat
ATTENTION: The battery terminals must be disconnected before commencing any work on
the battery.
ATTENTION: This battery can accumulate parasite current. Do not touch the B+ and B-
terminals. Always check the B+ and B- terminals with a voltmeter. Always ensure that there
is ZERO volts present on the terminals before performing any operation on the battery.
ATTENTION: Always wear Individual protection devices and follow the safety plan of the
ATTENTION: Battery must be recycled by professional company
LITHIUM END LIFE PROGRAM FREE OF COSTS

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-4
TABLE OF CONTENTS
STATEMENT 5
1 PREFACE 6
2 INFORMATION IN THIS MANUAL 6
2.1 About this Manual 6
2.2 Use Range 6
2.3 Additional Information 6
2.4 Symbols Used 6
3 SAFETY 7
3.1 Warnings and Notification 7
3.2 Safety Guidelines 7
4 PRODUCT OVERVIEW 8
4.1 Product Introduction 8
4.2 Identifying the Product 8
4.3 Product Identification Labels 8
5 SYSTEM INSTALLATION 9
5.1 Installation Notice 9
5.2 Package Information and Parts List 9
5.3 Installation Procedure 12
5.4 Communication and Control Panel 18
5.5 DIP Switch Settings 19
5.6 Parallel Battery Wiring Connections 21
6 BATTERY ACTIVATION AND SHUTDOWN 24
6.1 Panel Button and LEDs Explanation 24
6.2 Stand Alone Battery Front Panel Control 24
6.2.1 Start Battery 24
6.2.2 Shut Down Battery 24
6.2.3 Low battery Forced Charge Function 24
6.3 Parallel Battery Configuration 25
6.3.1 Activation of Parallel Batteries 25
6.3.2 Shut Down of Parallel Batteries 25
7 TROUBLESHOOTING 26
8 SOFTWARE GUIDE 28
9 PRODUCT COMPATIBILITY LIST (See Also 8.5) 32
10 SINGLE CLUSTER CONFIGURATION GUIDE (100A) 33
11 SINGLE CLUSTER CONFIGURATION GUIDE (300A) 36
12 MULTI CLUSTER HUB CONTROLLER 39
13 MULTI CLUSTER CURRENT LIMITATIONS 43
14 MULTI CLUSTER CONNECTION CONFIGURATIONS 45
15 INVERTER SETTINGS 48

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-5
Statement:
The following statement is related to the product 4K4 HeSU Stackable Version.
In case of product upgrades or other reasons, this document will be adjusted accordingly. Unless otherwise agreed, this
document is intended to be used only as a guide, and all statements, information and advice in the documentation shall
not constitute any express or implied action in contradiction to local regulations or standards.
For more information, please contact us.
The official information and the latest datasheet are available on www.wecobatteries.com
It is essential that the battery unit is equipped with the latest firmware version available.
WeCo will release new firmware to improve the functionalities and battery capabilities from time to time
The latest version of the firmware is always available free of charge, the battery firmware can be updated by your local
installer.
You can also write an email to [e-mail] to understand the upgrade procedure.
ATTENTION
This battery model is designed to be used indoors
The STANDARD IP20 degree of protection does not allow installation in outdoor environments even if sheltered
from the weather.
The INDOOR definition means literally the internal environment, the room must be closed to unauthorized persons,
ventilated and dry.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-6
1 PREFACE
Thank you for choosing our product. We will provide you with a good quality product as well as reliable after service.
To pro tect against harm to both personnel and the product, please read this manual carefully.
This manual provides detailed information on operation, maintenance and troubleshooting of the product as well as health and
safety advice.
Special Announcement:
The manufacturer holds the right of final explanation of any content in this manual.
2 INFORMATION IN THIS MANUAL
2.1 About this Manual
This manual relates only to the HeSU 4k4 Low Voltage Universal Stackable Model. This manual is intended to be used only by
qualified installers who must read carefully and always refer to the manual for guidance on correct operation and maintenance of the
product.
2.2 Use Range
This installation guidance applies only to the HeSU 4k4 Low Voltage Universal Stackable Model.
2.3 Additional Information
Specification of the product can be changed without any notice to customers.
2.4 Symbols Used
Symbol meanings：
CAUTION：
CAUTION represents hazardous situations which can cause light injuries if not avoided.
NOTICE
：
NOTICE represents the situations which can cause damage to property if not avoided.
INFORMATION
：
INFORMATION provides tips that are valuable for optimum installation and operation of the product.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-7
3 SAFETY
3.1 Warnings and Notification
Installation environment requirements: -HESU- SERIES is designed for household purposes. For installation, it must be installed in a
location complying with IP20. (IP 55 or IP65 are available on request). Installations in locations that do not comply with IP20 may
cause failure and/or damage to the product and subsequently the product warranty will be considered void.
3.2 Safety Guidelines
CAUTION
：
At all times be certain to avoid a short-circuit between the anode terminal and a cathode terminal of the battery. All electrical
connections on the -HESU- SERIES must be made only by qualified professional personnel.
When installed and operated in accordance with this manual, the HeSU Series battery will perform as a safe and reliable manner in
accordance with the battery operating specifications.
Subjecting the battery to an unsuitable operating environment or to damage, misuse or abuse may result in health and safety risks
such as overheating or electrolyte smoke potential. All personnel must comply with the safety precautions and observe all warnings
as detailed in this document. If any of the safety precautions or procedures detailed in this manual is not fully understood by the
reader, the reader must not perform any operation on the battery, until they have contacted WECO the customer service officer for
clarification and confirmation of understanding of the correct procedure.
The safety guidelines included in this document may not include or consider all the regulations in your area of installation/operation.
When installing and operating this product the installer must review and consider applicable local laws and regulations in accordance
with the industry standards of the product.
Installation personnel shall not wear watches and other metal items when performing installations as a precaution to avoid short
circuits and personal injuries.
CAUTION
：
The weight of an individual HeSU 4k4 battery is around 50kg, please use original packaging and perform all safety precautions if the
battery is to be relocated to another location, to avoid damage to the product and personnel injury.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-8
4 PRODUCT OVERVIEW
4.1 Product Introduction
The HeSU Series batteries can be used as an on-grid or off-grid energy storage system. It is recommended not to use this product for
any purpose other than the intended purpose as described in this document.
Use of this product other than as described in this document will nullify the product guarantee. The substitution or installation of any
components of this battery will nullify the product guarantee.
The use of any components contained within or connected to this battery other than the products sold as part of this product or
recommended by the manufacturer will nullify the product guarantee.
Connecting more than five individual HeSU 4k4 battery units in parallel will nullify the product guarantee.
4.2 Identifying the Product

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-9
4.3 Product Identification Labels
The nameplate label attached to the product describes the product parameters, including model type and serial number. Installers
must always check that the specifications displayed on the nameplate of the battery module relates to the installation manual that is
being referred to for guidance.
Only qualified personnel, with a comprehensive understanding of this manual are permitted to install this product.
Stackable Brackets
Front Cover
Insulated Supports (4x)
Battery module

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-10
5 SYSTEM INSTALLATION
The battery is packed in a carton box. The total weight exceeds 50Kg and as such it is mandatory that the opening, unpacking and
preliminary checking of the battery is conducted by carried out by a minimum of two people.
5.1 Installation Notice
a) Before installation, check the battery open circuit voltage.
b) Battery installation location should be at least 20m away from sources of heat, sparks or other sources of extreme temperature.
c) Battery connecting cables should be as short as possible to prevent excessive voltage drops.
d) Batteries with different capacity, different P/N or from different manufactures must never be connected together.
e) Before connecting the battery, the battery positive and negative poles need to be carefully checked to ensure correct installation.
f) The battery should be installed on a horizontal plane.
5.2 Package Information and Parts List
The battery is packed in a carton together with standard accessories. When unpacking the battery, be sure to check that the battery
and accessories are free from damage and that the correct quantities of each component are included within the carton.
The following list of components can be used as a check list when unpacking the individual battery and battery kits.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-11
5.2.1 Parts list (Standard Kit 100A)
Number
Name
Quantity
Description
Image
1
Battery case
1-5
Battery
2
Short power cable
(Stack KIT)
1+1
Positive and negative
Ring terminal
connection
3
Fixed front screws
(Stack KIT)
4
Screws 5x35
4
CAN cable RJ45
Parallel Connection
(provided with the
battery)
1
100cm
5
Stack Brackets + M4
screws (Stack KIT)
3
1 kit x 3 each box +
screws
6
Front Panel (Stack KIT)
1
1 kit
7
Supports (Stack KIT)
4
1 kit x 4 each box +
screws
8
BMS/STD
1 BMS std Cable 100cm

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-12
5.2.2 Recommended Installation Tools
Multimeter + Current clamp
Screw Driver Set
Allen Key Set
Drill + Hammer
Electrician Scissors
Wrench set
Lifting strap + mechanical lifter
RS 232/USB+screw terminal (insulated)
5.2.3 Personal Protective Equipment

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-13
5.3 Installation Procedure
5.3.1 Battery Controls and Connections
RUN/STOP Button
NEGATIVE TERMINALS B
EARTHING POINT
RS 232 / LAN connection
RS 232 PLUG
RUN/STOP Button 2
BATTERY HANDLE
RS 485 PARALLEL A/B
DIP SWITCH
BMS CAN
D/I-D/O
NEGATIVE TERMINALS A

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HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-14
5.3.2 Installation/Assembly Method
5.3.2.1 Installation of accessories and preparatory phases
Phase 1: Choose the support surface carefully, the batteries have a weight of over 50 kg each and can reach 270 kg
including the accessories, in a stack of five batteries.
The surface profile of the battery on the ground is 55cm x 46cm but the actual contact with the ground is made by 4
supports of about 4x10 cm each.
Make sure the support surface is adequate to support the overall battery load.
Information
：
Preparation of the modules
The battery is delivered as standard in a WALL MOUNT CONFIGURATION and it is therefore necessary that the installer
make simple external changes to install the STACK KIT.
STACK MOUNT INSTALLATION PHASES FOLLOW
1. Install the support feet on the back of the battery using the supplied screws. Each foot must be
installed with 2 M8 Allen screws supplied. Repeat the operation for all the batteries you want to stack.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-15
2. Once the support feet have been installed, place the first battery on the ground surface in and check that the
battery is even and that all four feet are making connection with the ground surface.
Next, install the four feet on the bottom of the second battery and place the second battery on top of the first
battery. Check that the second battery is aligned with the first battery and that all feet are making contact with
the first battery.
2. Once each battery has been installed in the horizontal position the feet which shipped with the battery in
standard configuration can be removed as they are no longer required.
3. With the second battery correctly positioned on top of the first battery you must install the perimeter alignment
brackets, two at the sides and one at the back.
First module on the ground
2. Perimeter alignment brackets
3. Screw into the support using the M4
screws supplied
Lift the second module and place it on the
first module

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-16
4. Continue installation of the three perimeter support brackets to ensure that the second battery is securely
installed on top of the first battery.
CAUTION
Each battery weighs more than 50kg and must be installed with the help of a mechanical lift, and / or with at least
two people equipped with suitable suction cups for lifting or lifting straps
3. Continue the installation with the desired quantity of modules following the sequence described in
points 1 through 5.

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-17
4. MAKE SURE THAT THERE IS ZERO VOLTAGE ON THE BATTERY TERMINALS.
CHECK THE LED BUTTON ON THE BOTTOM AND ALWAYS MEASURE THE B+ AND B-
TERMINALS WITH A MULTIMETER.
Once it has been verified that there are ZERO volts present ON ALL BATTERIES, proceed with the installation of the cables as
shown in the diagram below.
RUN / STOP button with LED indicator
Power connections
(attention to the connection methodology)
OUTPUT Negative from the upper module
OUTPUT positive from the Lower module
B
RS 485 Series start from door B,
continues to the next module towards door A
CAN-BMS to inverter
OUTPUT Positive from the Lower module

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-18
5. After all cables have been connected, install the front plate protective covers as shown below.
Always start at the bottom and work up to the top.
Always install cables in accordance with installation guidelines and avoid long cable runs to prevent excessive voltage drops
6. The complete installation for the battery stack can be seen below.
Install the plate using the
supplied M8 Allen screws
Note that the output position of the cables is only indicative and can vary with each installation
Output position of the power cables and recommended CAN cable

WeCo - HeSU 4K4 Low Voltage UNIVERSAL STACKABLE MODEL
HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-19
5.4 Communication & Control Panel
5.4.1 Terminal Function and Definition
The terminal layout is shown in the following figure:
Attention
：
Interface-C is an RJ45 Port corresponding to the CAN Bus pin definition shown below
8 · · · · 1
Pin 8 7 6 5 4 3 2 1
Definition GND CAN_L CAN_H

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HeSU 4k4 UNIVERSAL STACKABLE * HIGH CURRENT V_1.07.1_2019 Page-20
5.5 DIP Switch Settings
ATTENTION
ALWAYS CONFIGURE THE DIP SWITCH SETTINGS BEFORE CONNECTING ANY POWER
CABLES TO THE BATTERY TERMINALS B+ AND B-.
WHEN CHANGES HAVE BEEN MADE TO DIP SWITCH SETTINGS THE BATTERIES MUST
ALWAYS BE RESTARTED FOR THE CHANGES TO TAKE EFFECT.
WHEN THE INVERTER HAS A CANBUS COMMUNICATION PORT SWITCH#5 OF THE
MASTER BATTERY MUST ALWAYS BE SET TO “ON”.
5.5.1 Stand Alone Battery
MASTER (INDIVIDUAL)
5.5.2 (Master + Slave#1)
MASTER SLAVE#1