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Wall and Stackable Solution
Version -P- up to 8 modules in parallel with FW version Above 3,69
Interconnection between 5 DIP model and 8 DIP model
PREFACE
Thank you for choosing our product. We will provide you with a high-quality product as well
as reliable after service. To protect against harm to both personnel and 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.
SYSTEM DESIGN
Systems Design is the process of defining the architecture, components, modules, interfaces, and
load data for a system to satisfy specified requirements.
For a solar system these components are the PV modules, inverter/charge controller & batteries, as
well as the different interfaces of those components.
BATTERY OPERATION
There are several factors that affect the operation of the battery concerning its ability to deliver
capacity and life expectancy.
Storage
Module properly packed into original DG9 carton box to be stored indoors in a clean, level, dry, cool
location.
Recommended storage temperature is 25°C.
The Battery can be stored in the range of -20°C + 45°C but it is required an inspection and recharge
every three months (max charging current is 0.1C at a temperature not lower than 15 °C).
Max SoC storage is 30%.
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Temperature
Many chemical reactions are affected by temperature, and this is true for the reaction that occurs
in a storage battery too.
The chemical reaction of a Li-Ion is slowed down by a lowering of the electrolyte temperature and
this results in less capacity.
A battery that will deliver 100% of rated capacity at 25°C will only deliver approximately 75% of
rated capacity at 10°C.
At temperatures below -7°C the BMS will allow only 0.1C charging Current and below -10°C the
charge is forbidden.
As part of the performance Warranty, Charge and Discharge shall be in the range 20-25°C and 0,5C;
any usage outside this range is not covered by Performance Warranty.
Depth of Discharge (DoD)
Depth of discharge is a function of design. The deeper the discharge per cycle, the shorter the life
of the battery. A cycle is a discharge and its subsequent recharge regardless of depth of discharge.
The number of cycles at a specific DoD and the projected life in years the battery / battery system
will provide prior to needing replacement are closely linked.
Charging
Majority of battery capacity/life issues can be traced back to improper charging. Improper charging
settings may lead to an overcharging or undercharging condition.
WeCo guarantee only batteries connected via BMS line to the Approved inverter.
Typical Inverters/Charge Controllers are equipped with CAN/BMS interface ad no settings are
required to charge and discharge the battery.
Warranty
Although the BMS of the battery allows a wide range of use both in terms of temperature and
charging currents, this should not be construed as an implicit authorization to use the battery at
these levels.
For the purposes of the performance guarantee, it is mandatory that the battery is used within the
range of temperature and charge / discharge current and Depth of Discharge indicated in the
performance guarantee.
Any other use, even if permitted by the BMS ranges, is not covered by a performance guarantee.
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HeSU 4k4 PRO Battery Module
In case of product upgrades to the 4k4 PRO Battery Module or for 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 service@wecobatteries.com to understand the upgrade procedure.
ATTENTION
The 4k4 PRO Battery Module 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.
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ATTENTION SAFETY AND PREACUTIONS
ATTENTION: The battery could explode and/or be severely damaged if dropped or crushed.
ATTENTION: The battery may explode if 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.
ATTENTION: Always ensure that there are ZERO volts present on the terminals before performing any operation on the
battery.
ATTENTION: Always wear Individual protection devices, use insulated tools, and follow the safety plan of this manual.
ATTENTION: Appropriate mechanical lifting equipment must be used since the Battery Module weighs
107Lbs / 48.7 kg
DISPOSAL INFORMATION
At end of life, these batteries must be disposed of properly by a
certified professional company.
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TABLE OF CONTENTS
PREFACE
INFORMATION IN THIS MANUAL
2.1 About this Manual
2.2 Use Range
2.3 Additional Information
2.4 Symbols Used
SAFETY
3.1 Warnings and Notification
3.2 Safety Guidelines
PRODUCT OVERVIEW
4.1 Product Introduction
4.2 Identifying the Product Components
4.3 LED Bar Definitions
SYSTEM INSTALLATION
5.1 Installation Notice
5.2 Package Information and Parts List
5.3.1 Installation Procedure (Wall Mount)
5.3.2 Installation Procedure (Stack Mount)
5.4 Communication and Control Panel
5.5 DIP Switch Settings
5.6 Parallel Battery Wiring Convention
BATTERY ACTIVATION AND SHUTDOWN
6.1 Panel Button and LEDs Explanation
6.2 Stand Alone Battery Front Panel Control
6.2.1 Start Battery
6.2.2 Shut Down Battery
6.2.3 Low battery Forced Charge Function
6.3 Parallel Battery Configuration
6.3.1 Activation of Parallel Batteries
6.3.2 Shut Down of Parallel Batteries
TROUBLESHOOTING
SOFTWARE GUIDE
SINGLE CLUSTER CONFIGURATION (100A)
SINGLE CLUSTER CONFIGURATION (300A)
DRY CONTATS SETTINGS
INVERTER SETTINGS WITHOUT BMS-CAN CONNECTION (GENERAL)
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1 PREFACE
Thank you for choosing our product. We will provide you with a good quality product as well as reliable after service.
To protect 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.
For Warranty and Performance Warranty must refer to the Latest Official Limited Warranty Document.
STORAGE & PRE-OPERATIONAL PROCEDURES
1.1 Storage - Transportation – Removing / relocation of batteries
✓ This Battery is considered DANGEROUS GOODS by the United Nation and must be treated accordingly.
✓ Each box comes from the factory with the below labels:
✓ This battery can only be transported and stored with the original approved Carton Box, Certified as per UN CLASS 9
Y80.
✓ This Battery must be stored in its original carton box in a dry and cool place, WeCo carton box are marked as below:
✓ The transportation and Storage SoC shall not exceed 50%.
✓ The Shelf period without recharging is 3 months, it is required a quick charge up to 70% DoD and discharge back to
50% at 0.5C /25°C.
✓ To preserve the performance the shelf life of this battery store at 25°C 70% Humidity.
✓ Optimal Storage temperature of the battery is between 15°C and 35°C.
✓ The self-Discharge in the range of 15-35°C is around 1% a month, outside this range could exceed 10% a month.
✓ Do not store the batteries near sources of heat, vapor, Gas, Fuels, Sparks or anything that could generate fire or
explosion.
✓ Store inside and protect from water and moisture.
✓ Transportation of new and used or damaged modules must be in accordance with the UN 38.3 Regulation and with
the local rules.
✓ If one or more working units needs to be removed or relocated this must be marked as USED BATTERY (follow local
rules).
✓ If one or more modules need to be replaced due to damage, they should be marked as DAMAGED USED BATTERY
and take any applicable procedures for location and local regulations.
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2 INFORMATION IN THIS MANUAL
2.1 About this Manual
This manual relates only to the HeSU 4K4 PRO 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 PRO 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 represents hazardous situations which can cause light injuries if not avoided.
NOTICE represents the situations which can cause damage to property if not avoided.
INFORMATION provides tips that are valuable for optimum installation and operation of the product.
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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. 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
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.
The weight of an individual HeSU 4K4 PRO battery is 48.7 kg, 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.
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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 eight HeSU 4K4 PRO battery units in parallel will nullify the product guarantee.
Stacking more than five modules HeSU 4K4 PRO is not allowed.
4.2 Identifying the Product Components
Front RUN BUTTON Version
BATTERY HANDLE (feet)
RUN/STOP Button 2
DIP SWITCH
RS 232 OPERATOR PORT
RS 485 PARALLEL A/B
BMS CAN
D/I-D/O
RS 232 / LAN connection
EARTHING POINT
NEGATIVE TERMINALS
POSITIVE TERMINALS
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Side RUN BUTTON Version
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.
RUN BUTTON
OPERATOR PORT
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4.3 SIDE LED Bar definitions
During startup: LED1-LED5: GREEN for 5 Seconds.
After startup: LED1-LED5 changes to BLUE color and the SOC of the battery will be displayed.
During the normal status the LED bar always displays SOC value.
During a Fault or Error the LED bar displays the SOC value for 5 seconds, and then displays the battery fault status for 5 seconds, alternately
5 SYSTEM INSTALLATION
The battery is packed in a carton box. The total weight exceeds 50 kg 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 source of potential danger.
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 or wall mounted.
SOC 90-100%
SOC 55-89%
SOC 32-54%
SOC 6-31%
SOC 5% * (Yellow when SOC is below 4,9%)
SOC STAUS
ERRORS
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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.
5.2.1 Parts list * Included Accessories
Number
Name
Quantity
Description
Image
1
Battery
1
Lithium battery module
RAL 7016 GREY
2
Wall mounting plate
1
Support Plate
3
Wall screws
4
Wall Plate Fixing
Screws+Plug
4
CAN cable RJ45
( RJ 45/RJ9)
1
1.5m
5
RJ45 parallel cable
1
1.5m
6
Power cable
1
Length 2.5m
25mm diameter
7
User manual
1
https://wecobatteries.com/download-area/
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5.2.2 Stack Kit (To be purchased separately)
Number
Name
Quantity
Description
Image
1
Front Cover
1
Front Cover + 4 Screws
RAL 7016 GREY
2
Screw bag
1
4 M8 Screws + 4 rubber
pads
3
Parallel Bus Bar
1+1
1 Red Bus Bar
1 Black Bus Bar
5.2.3 Recommended Installation Tools
To remove the terminal cover it is required an Allan Key 2.5mm
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
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5.3.1 Installation Procedure (Wall Mount)
Preparing the installation area by considering the battery dimension and weight.
The battery weight is about 50kg including all accessories contained into the Box.
The wall and/or the floor the floor must be capable of supporting the battery weight.
Wall Installation Procedure
Step 1：Install the fixing screws on the appropriate height of the wall. The scheme is as following:
When installing the screws, please check the wall plug size, WeCo provides 4x φ10*60mm, but it may be that a different size or type will be
required depending on the actual installation surface.
Step 2: Make sure that the mounting screws are firmly and securely attached to the wall.
Plate Fixing Screws
155
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When the battery bracket is fixed, please work with a partner to avoid damage to the product or personal injury and install the battery on
the wall bracket.
Step 3: Fix the support plate on the wall. Step 4: Interlock the battery module with the wall bracket.
For wall and floor installation it is always required to secure the battery module with the vertical structure by using the provided bracket
Free standing installations are strictly forbidden.
Wall Mounted Floor Mounted
When installing the battery, please work with appropriate lifting devices managed by at least two people to avoid product damage or personal
injury. The battery module exceed the weight that a single person can lift without mechanical supporting devices.
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Wall Mounted Installation of Multiple Batteries
Keep 20 cm between the batteries and or between walls and other objects on the left and right side.
Maintain at least 40 cm from the ceiling.
The bottom side of the battery is suggested to be at 100cm from the floor for an easiest maintenance.
Wall Stack Installation (Vertical Tower Kit to be ordered separately )
Maximum Three Batteries per Stack
Up to three batteries can be installed vertically, one on top of the other, against a wall with the bottom battery resting on the floor.
This installation will require the vertical installation kit (Vertical Kit) only available for use with the 4K4 batch WE-4K4P-21-30-0001.
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5.3.2 Floor Stack Installation
5.3.2.1 Installation of accessories and preparatory phases
Phase 1: Choose the support surface carefully, the batteries have a weight of 48.7 kg each and can reach 250 kg including the
accessories, in a stack of five batteries.
Make sure the support surface is adequate to support the overall battery load.
Max number od stack units is five.
Preparation of the modules
The battery is delivered as standard in a WALL MOUNTED CONFIGURATION and it is therefore necessary that the installer make
simple external changes to install into a STACKABLE CONFIGURATION.
STACK MOUNT INSTALLATION PROCEDURE
Step 1: When the batteries will be stacked, you must remove the three brackets from the back side of the battery as shown
below.
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Step 2: Next, install the pads on all four corners of the back of 1st module using the stack brackets in reverse position ( see video
on WeCo batteries Youtube Channel https://www.youtube.com/watch?v=kzxuK2jWPK8&t=296s).
Positioning the first module on a support in accordance with the local regulation and in accordance with the site specifications.
Step 3: To lift and position the battery on top of the first one, use the temporary handles provided with the stack kit and align the second
battery with the first and lay down the second module.
Step 3.a: Lay the first module on a support in accordance with the local regulation and in accordance with t he site specifications.
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