Weco HeSU UNIVERSAL 5K3 User manual

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 1
48V Household Energy Storage System UNIVERSAL 5K3
Product manual HESU Max 5 units in Parallel Max 5 Clusters
Model type HeSU UNIVERSAL STACKABLE UNITS
BMS-CAN V3.0
Version：5K3_V2.00-November 2019

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 2
Battery can explode if heavy object impact on it.
Battery´s Weight Exceed 52 kg, must be handle with mechanical devices
Battery can explode, keep away from free flames or sparks
disconnect any terminal before operating the battery
This battery can accumulate parasite current, disconnect the main breaker and wait 5 minutes
before operating. Don’t touch the terminal B+ B- check always with a Voltmeter, “Must be 0V”
Always wear Individual protection devices and follow the safety plan of the
This Battery must be must be recycled by professional company

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 3
Content
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 Symbol Used.........................................................................................................................................................................................................6
3 Safety......................................................................................................................................................................................7
3.1 Warnings and Notification............................................................................................................................................................................7
3.2 Safety Guidelines ...............................................................................................................................................................................................7
4 Product Overviews...........................................................................................................................................................7
4.1 Produce Introduction.......................................................................................................................................................................................7
4.2 Identifying the Product...................................................................................................................................................................................8
4.3 Product identification......................................................................................................................................................................................8
5 System Installation ..........................................................................................................................................................9
5.1 Installation notice ..............................................................................................................................................................................................9
5.2 Package information and system configuration list ........................................................................................................................9
5.2.1 Configuration list of -HESU- SERIES ............................................................................................................................................................................................................9
5.2.2 Parts list..................................................................................................................................................................................................................................................................... 10
5.2.3 Installation Tools ................................................................................................................................................................................................................................................... 11
5.2.4 Personal protective equipment ...................................................................................................................................................................................................................... 11
5.3 Installation..........................................................................................................................................................................................................12
5.3.1 Product dimensions ............................................................................................................................................................................................................................................. 12
5.3.2 Installation method .............................................................................................................................................................................................................................................. 13
5.4 Wiring definition .............................................................................................................................................................................................17
5.4.1 Terminal function and definition ................................................................................................................................................................................................................... 17

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 4
5.5 A single battery box is connected to the inverter..........................................................................................................................18
5.6 A plurality of battery boxes are connected in parallel with the inverter............................................................................18
5.6.1 Communication line connection .................................................................................................................................................................................................................... 18
5.6.2 Power cable connection ..................................................................................................................................................................................................................................... 19
6 Battery box activate and shutdown.....................................................................................................................22
6.1 Panel buttons and LEDs meaning..........................................................................................................................................................22
6.2 The operation steps of the battery box works alone ...................................................................................................................23
6.2.1 Start battery box................................................................................................................................................................................................................................................... 23
6.2.2 Shut down battery box....................................................................................................................................................................................................................................... 23
6.2.3 Low battery forced charge function ............................................................................................................................................................................................................ 23
6.3 The steps of the battery boxes work in parallel..............................................................................................................................23
6.3.1 Activate the parallel batteries system........................................................................................................................................................................................................ 23
6.3.2 The parallel Batteries system shutdown ................................................................................................................................................................................................... 24
7 Troubleshooting .............................................................................................................................................................23
8 Product compatiblility list.........................................................................................................................................26

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 5
Statement:
The following are related to the product 5K3 HeSU RACK Version
Due to product upgrades or other reasons, this document will make appropriate adjustments. 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.
For more information, please contact us
The official information and the latest datasheet are available on www.weco.uk.com
This battery unit is equipped with the latest firmware version available.
WeCo will release new firmware to improve the functionalities and battery capabilities.
The latest versions of the firmware are always available free of charge, the battery can be updated by your local installer or writing an
email to wec[email protected] to know the upgrade procedure.
ATTENTION
This battery model is built to be used indoors
The 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, dry,
healthy and tempered

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 6
1 Preface
Thanks for choosing WeCo products. We provide a good, high quality and after sale service.
To protect using staffs and product, please kindly read this manual carefully which provide detailed information for products features,
structures, operate standard, maintenance and troubleshooting.
Special announcement:
This manual can’t be taken as basis of requirement for the manufacturer
Manufacturer hold the final explanation right of this manual.
2 Information in this Manual
2.1 About this Manual
This is the Manual for the -HeSU, is an Installer/ User manual, the installer and the user must refer to the manual guidance to operate
and maintain correctly.
2.2 Use Range
This installation guidance applies only to the -HeSU- LOW VOLTAGE
2.3 Additional Information
Specification of the product can be changed without any notice to customers for the system improvement.
2.4 Symbol Used
Symbols 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 UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 7
3 Safety
3.1 Warnings and Notification
Installation environment requirements: -HESU- SERIES is designed for household/commercial purposes. For installation, it must be
installed in a location complying with IP20. (IP 55 or 65 are available on request) If the Installation location does not comply with IP20
may cause failure and the product will not be guaranteed for any related accident or damage.
3.2 Safety Guidelines
CAUTION：
Install and use to avoid short-circuit between the anode terminal and a cathode terminal, all electrical connections on the -HESU-
SERIES work must be operated by qualified professional personnel, when operated in accordance with the expected design -HESU-
SERIES battery will be used as a safe and reliable power supply. In the absence of proper operating conditions, damage, misuse and /
or abuse case, battery box there may be security risks such as overheating or electrolyte smoke potential, users are described in this
section must comply with the safety precautions and warnings. If any of the following precautions is not fully understood or has any
problems, please contact the customer service officer for assistance. The safety part may not include all the regulations in your area.
The use of -HESU- SERIES must review applicable local laws and regulations and the industry standards of the product.
Installation personnel shall not wear watches and other metal items to install operations, in order to avoid short circuits and personal
injuries.
CAUTION：
Due to high weight of -HESU-SERIES, please use original package and do safety protection when second transport.
Please ensure that the battery box in the process of transportation safety, to avoid damage to the product and personnel injury.
4 Product Overviews
4.1 Product Introduction
HESU- SERIES battery box products as the energy storage parts can be used in off-grid & on-grid energy storage system. It is
recommended not to use this device for other than the purpose described in this guidance. The substitute use of this product, random
change, and use of components other than sold or recommended by Manufacturer will nullify the product guarantee. Products also
support the largest group of five parallel battery box connection.

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 8
4.2 Identifying the Product
4.3 Product identification and labels
The nameplate label describes the product parameters and is attached to the product. For details, please refer to the nameplate label
of the product. For safety reasons, the user must have a good understanding of the contents of this manual before install the product
Front Cover
Insulated Supports Front side x2
Battery module
Insulated Supports Back side x2

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 9
5 System Installation
The battery is packed in a carton box, the total weight exceed 52Kg, is mandatory the presence of two persons during the unpacking
operations and preliminary check, and a mechanical lift to carry and handle the modules.
5.1 Installation notice
a) Before installation, check the battery open circuit voltage, do not install with closed circuit
b) Battery installation location should be away from heat and avoid produce spark. The safety distance should be above than 20 m.
c) Battery installing connecting cables should be as short as possible, to prevent excessive line pressure drop.
d) Batteries with different capacity, different P/N or different manufactures are not allowed for connection.
e) Before conducting the battery, the battery positive and negative poles need to be carefully checked as well to ensure correct
installation.
f) The mounting floor should be horizontal.
5.2 Package information and system configuration list
The battery box is packed in cartons, and the components assort with the battery case. When you confirm the goods, please read t
he configuration list carefully to make sure that the battery box and kit are intact.
5.2.1 Configuration list of -HESU- SERIES (BATTERY PARALLEL).
Number
System capacity
-HESU- 5,3
1
Single Battery pack
1
2
Up to 5 units in parallel
5x5.3kWh
3
Up to 5 units per cluster for a total of 25 units
5x5x5,3kWh

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 10
5.2.2 Parts list (Standard Kit 120A).
Number
Name
Quantity
Description
Image
1
Power Cable
2
2x25mm²AWG cable 2.5 (m)
each Red/Black
2
CAN cable RJ45
Parallel Connection
1
100cm
3
Flat Cover
1
Flat Cover for Bus bar
protection in Stackable
configuration
4
Back Side feet Support
2
Steel/Rubber stackable feet
Back Side
5
Front Stackable lid
1
Steel/Rubber Stackable
Cover
6
Earthing Cable Screw
1
M5 Allen key
7
Screw Kit for feet and
front lid
1
8xM8 Allen key Screw, 4xM4
cross Screw
8
BMS/STD
1
1 BMS std Cable 100cm

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 11
5.2.3 Necessary 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)
5.2.4 Personal protective equipment

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 12
5.3 Installation
5.3.1 Product View
-RACK MOUNTED CONNECTION VIEW
RS 232 / Wi-Fi HUB
connection
RUN/STOP Button
DIP SWITCH ADDRESS
BMS CAN
Digital I/O
NEGATIVE TERMINALS B
RS 485 PARALLEL A/B
NEGATIVE TERMINALS A
Power Switch ON/OFF

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 13
5.3.2 Installation method
5.3.2.1 Installation of accessories and preparatory phases
Phase 1: Choose the support surface, the batteries have a weight of over 52 kg each and can reach 260 kg including the
accessories, if stacked in 4 elements.
For vertical ground mounted the support surface of the battery is distributed on 4 feet 10x4 cm, make sure to install a
distribution plate or make a proper foundation to support the weight.
In case of horizontal installation, the installer must prepare an adequate distribution plate on the floor in order to make a
safe and stable support for the pile of batteries.
Make sure the support and or the floor surface is adequate to support the battery load.
Attention
Check the floor maximum permissible load before install the batteries
52 Kg
104 Kg
156 Kg
208 Kg
260 Kg

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 14
Information：
Preparation of the modules
The battery is delivered in WALL mode and it is therefore necessary for the installer to make simple changes to install the
STACK kit. Below are the installation phases.
1. Install the feet on the bottom of the battery, each foot has 2 m8 screws and make sour to install each leg in its right
position as shown below.
2. Remove the back-side wall support plate using Cross screw driver, plate has 5 screws.
Front
Back

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 15
3. Once the wall bracket support has been removed, start stacking the second module in correspondence with the
first module laid on the ground.
The battery weighs more than 52kg and must be installed with the help of a mechanical lift, and / or with at
least two people equipped with suitable suction cups for mechanical lifting or lifting straps
4. Continue the installation with the desired modules following the sequence described in the previous points.
5. Connect the power cables as indicated, making sure that the batteries are OFF (check the button LED on
the bottom) and always measure the terminals with a multimeter.
1-First module on the ground platform
2-Lift the second module and place it on the
first module

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 16
6. Complete the assembly of all the cables and close them with the black flat cover lid.
Arrange the cables according to the installation technique, always paying attention to reducing the length of the cables to
avoid voltage drops.
OUTPUT Positive from the Lower module
OUTPUT positive from the Lower module
OUTPUT Negative from the upper module
RS 485 Series start from port B,
continues to the next module towards port A
CAN-BMS to inverter
RUN / STOP button with LED indicator
Power connections
(attention to the connection methodology)
Install the Stackable
flat cover lid using
screw driver
On the Upper Module Keep
the Original connection HUB cover

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 17
7. Battery installed correctly, see image below.
5.4 Wiring definition
5.4.1 Terminal function and definition
The terminal layout is shown in the following figure:
Wiring definition table
Interface
Name
Function
A
ADD
DIP switch, set the RS485 address and terminal resistance.
B
RS485-A
RS485-B
When the battery box is used independently, it can communicate with the inverter via RS485 interface.
When the battery box is used in parallel, the RS485 interface is used for synchronous communication
between battery packs.
C
CAN
CAN bus interface communicate with the inverter.
D
RS232
RS232 interface for monitoring battery box real-time data and troubleshooting.
E1
DIN1-P
E2
DIN1-N
A
B
C
D
E
F
G
RUN/STOP
ON/OFF
Suggested Cable Output from the Bottom Side.

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 18
E3
DIN2-P
IO port, interacts with a diesel engine, a photovoltaic device, or other external device.
E4
DIN2-N
E5
DO1-P
E6
DO1-N
E7
SDO1-P
E8
SDO1-N
F
B+/B+
Battery positive
G
B-/B-
Battery negative
Attention：C interface RJ45 port corresponding to the CAN bus pin definition
5.5 DIP SWITCH SETINGS for single battery box is connected to the inverter
Attention: the drawing is for reference only, please take the real product as the standard, if the manual does not match the product
please stop any action, remove any connection and store the battery in a safe place, call the product assistance for support.
CAUTION: Set the DIP switch after the need to restart the battery box, restart the settings will take effect.
A single battery box through the CAN communication connection inverter when the DIP switch is defined as follows:
MASTER (INDIVIDUAL)
ATTENTION: THE POWER PARALLEL MUST FOLLOW THE WIRING CONNECTION, A WRONG
POWER CONNECTION CAN DAMAGE THE BATTERY AND PROVOCATE INJURIES
5.6 A plurality of batteries are connected in parallel with the inverter
When users need to use more than one battery box in parallel, first repeat the installation of a single battery, and then in accordance
with the following methods for parallel installation and use.
The maximum current allowance are described in the next paragraphs
5.6.1 Communication line connection
Information: When multiple battery boxes are connected together is possible to choose between ‘’capacity’’ chain
series or parallel to increase capacity and peak (in case of parallel the parallel battery and inverter can only communicate through CAN
interface, and the communication between the batteries will be through RS485)
8 ····1
Pin 8 7 6 5 4 3 2 1
Definition GND CAN_L CAN_H

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 19
5.6.2 PARALLEL POWER CONNECTION FOR 3 BATTERIES (1 MASTER + SLAVE 1 + SLAVE 2)
Attention: The following figure is only the communication line connection diagram. Specific interfaces must be compared to physical
objects. PIN DEFINITION FOR MASTER and 1 SLAVE BATTERY
MASTER SLAVE
CAUTION：Set the DIP switch after the need to restart the battery box, restart the settings will take effect.
5.6.3 PARALLEL POWER CONNECTION FOR 3 BATTERIES (1 MASTER + SLAVE 1 + SLAVE 2)
MASTER SLAVE01 SLAVE02
CAUTION：Set the DIP switch after the need to restart the battery box, restart the settings will take effect.
5.6.4 PARALLEL POWER CONNECTION FOR 4 BATTERIES (1 MASTER + SLAVE 1 + SLAVE 2 + SLAVE 3)
MASTER SLAVE01 SLAVE02 SLAVE03
CAUTION：Set the DIP switch after the need to restart the battery box, restart the settings will take effect.
5.6.5 PARALLEL POWER CONNECTION FOR 4 BATTERIES (1 MASTER + SLAVE 1 + SLAVE 2 + SLAVE 3 + SLAVE 4)
MASTER SLAVE01 SLAVE02 SLAVE03 SLAVE04
CAUTION：Set the DIP switch after the need to restart the battery box, restart the settings will take effect

WeCo - HeSU UNIVERSAL MODEL 5K3 UNIVERSAL STACKABLE
HeSU 5K3-R20 STACKABLE * HIGH CURRENT V_2.00_2019 Pag. 20
Attention: Power cable connection For High current connection diagram please refer to the specific section, charging
current limitation is mandatory as per this manual instruction.
Screws, cables and Bus Bar must be installed with diligence and the tighten of the connection terminal must respect the torque
mentioned in the manual which is 40Nm and the inspection must be performed every 3 months
40 Nm Power cable Tighten
DIAMETER 25mm CABLE PARALLEL CONNECTION DIAGRAM OVERVIEW
SINGLE CLUSTER -5 UNITS
ATTENTION:
Strictly follow the below scheme to connect the communication ports between unit’s master and
Slave RS 485 A port and B port Connection
MASTER+SL1
CAN BMS PORT