Weco LV-HUB GEN-02 User manual

LV-HUB V2.01 14/06/2022
Installation and User Manual
LOW VOLTAGE HUB VALID FOR 4K4 PRO and 5K3 LV/HV
(This Manual Is not Valid for installation with 5K3-XP battery module)
LV-HUB GEN-02

LV-HUB V2.01 14/06/2022
ATTENTION: This is a CAN communication device, it is very sensitive
to shocks and electromagnetic fields.
ATTENTION: This is a LOW VOLTAGE device and must be powered
from the battery common power line
ATTENTION: This device 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 are ZERO volts present on the terminals
before performing any operation.
ATTENTION: Always wear Individual protection devices, use insulated
tools, and follow the safety plan of this manual.
At end of life, must be disposed of properly by a certified
professional company.

LV-HUB V2.01 14/06/2022
Statement:
The information and guidance contained in this manual is related to the LV-HUB- GEN2- EMEA
version ( Not Valid for UL versions) Stackable model of battery. This manual contains two
sections:
LV-HUB GEN-2 it is designed to be staked on a 5K3 type battery
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 orstandards.
For more information, please contact us.
The official information and the latest datasheet are available on www.wecobatteries.com
It is essential that the device is equipped with the latest firmware version available on the web site
From time to time, firmware will be updated to improve the functionalities and battery capabilities. The latest
version of the firmware is always available free of charge and can be updated by your local installer.
You can always contact WeCo for additional information on the upgrade procedure.
Preface:
Thank you for choosing our product. We will provide you with a high-quality product as well as reliable after-
sale 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.
Declaration:
The manufacturer holds the right of final explanation of any content in this manual.
All trademarks shown in this manual belong to their legitimate owners; trademarks of third parties, product
names, trade names, corporate names and companies mentioned may be trademarks owned by their
respective owners or registered trademarks of other companies and are used purely for explanatory purposes
and for the benefit of the owner, without any purpose of violation of the copyright in force.
NOTICE:
This device 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 Battery Modules must be stored indoors in a clean, dry, cool location in a limited access area.

LV-HUB V2.01 14/06/2022
System Design
System Design is the process of defining the architecture, components, modules, interfaces and load data for a
system to satisfy specified requirements.
For a solar energy system, these components are the PV modules, inverter/charge controller & batteries, as well as
the different interfaces of those components.
The LV-HUB GEN2 - EMEA version is designed to connect in parallel multiple clusters with a single CAN connection to
the Hybrid Inverter
Product Overview
The LV-HUB GEN-2 is a CAN communication Combiner and can be used to connect multiple master CAN
communication addresses from multiple clusters that composing an LV system
The LV-HUB-XP is not a power device
LV-HUB GEN-2 need a power input in the range of 45-58V, that can be provided directly from the common
LV bus bar that connect all the cluster using the provided cables
Information in this Manual
About this Manual
Only trained and authorized personnel should install, repair or program thus device.
This manual should be reviewed in its entirety for proper storage, installation and operation of the device
Use Range
This device can be used only in low voltage applications
Additional Information
Product specifications subject to change without notice.
IMPORTANT NOTICES：
LV-HUB-XP minimum startup voltage is 30 Vdc and the max input voltage is 60Vdc
Symbols Used
Symbol Meanings：
CAUTION：
CAUTION represents hazardous situations which can cause 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.

LV-HUB V2.01 14/06/2022
LV HUB Overview
INFORMATION provides tips that are valuable for optimum installation and operation of the product.
SEE THE POWER/CURRENT CONFIGURATION
SET THE INVERTER POWER AS PER THE CABLES’ CAPABILITIES
Each battery pack and each cluster must have the same Voltage and Firmware.
All stack configurations must use the WeCo Bus Bar.
Each cluster must have the same number of battery packs.
This BMS BMU Master Hub is mandatory when more than one cluster is connected on a
common bus bar.
The LV HUB works only with CAN communication-approved inverters.
FUSE LID 3A 60A
POWER SUPPLY INPUT
DRY CONTACTS
RUN/FAULT
RUN BUTTON
SOC STATUS
OPERATOR PORT
CLUSTER CAN INPUT
WiFi Port
CAN BMS

LV-HUB V2.01 14/06/2022
For 4K4 PRO & 5K3 LVHV-EU ( Version 2019/21)
ATTENTION
For the Above Models of batteries, the LV HUB GEN-2 can manage a maximum of 7 clusters composed of a
maximum of 8 modules each.
ATTENTION
The batteries BMS must UPGRADE the firmware”BAT_HUB_V448” for HUB application
A MULTI CLUSTER SYSTEM SHALL BE CONNECTED WITH BUS BAR BETWEEN MODULES.

LV-HUB V2.01 14/06/2022
LV-HUB DEVICE OVERVIEW
Interface Description and Connector
A
I/O CONTACT 2X
Programmable closure/contact
B
DIP SWITCH
reserved, undefined
C
CAN BUS PORT
CAN / BMS Bus PORT for external solar –grid charger
D
WIFI PORT
Wi-Fi External PORT
E
CLUSTER CAN PORT
Master Cluster CAN from last master of the system
F
OPERATOR PORT
OPERATOR PORT FOR RS232/USB converter
G
INLET 48 Vdc
Connector for power input to connect to the bus bar ( 5A fuse inside)
H
ON OFF SWITCH
Internal Power Supply Switch
I
SYSTEM SOC
Show the system SOC, 0-25%●,25-50%●●, 50-75%●●●, 75-100%●●●●.
K
POWER LED
RED > POWER ON No light > POWER OFF
L
RUN LED
Steady light > system normal
Flashing > system failure
M
FUSE HOLDER
LV circuit Fuse
N
GND screw Connection
5mm Screw Terminal
A
B
C
D
E
F
G
I
H
M
N
K
L

LV-HUB V2.01 14/06/2022
Low Voltage CAN HUB Dimensions
Weight: Kg: 8
Control Logic and Protection Limit
The inverter, if applicable, must be set with the below restrictions in addition to the BMS
control logic.
MAX CURRENT WITH BUS BAR
*Please refer to the above table according to the number of clusters and parallels applicable to the system.
1. The charge current will be limited to zero Amps when the single module voltage has been reached 56.8V.
2. The discharge current will be limited to zero Amps when the single module voltage has been discharged to 50.4V.
3. The battery system will communicate with the inverter to limit the current.
4. Each Battery Module will be protected by the same logic separately as per single module protection concept.
5. If some modules, individually, reach any fault status, the single module will protect and disconnect from
the system in less than 3 seconds.
6. The current limit must be adjusted according to the real active batteries in system to restore the normal function.
7. If the cluster is not balanced, the current limitation set from the HUB to the inverter will be sent to manage
the rest of active modules and clusters. At the same time, the imbalanced modules or cluster will equalize
in standby mode and will reconnect once in the normal range.
8. If more than two batteries in one cluster are in protection mode, the entire cluster will protect by shutting down.
9. If there are more than two clusters in protection mode, the full system will be protected.
10. The battery sends information to the inverter to limit the charge/discharge current to zero Amps if the
battery is detecting an over current.
11. The protection built into the BMS will automatically disconnect the battery when it detects excess values.
The BMS will attempt to reconnect up to three times to check if the excess values have returned to within
the permitted range. After three attempts to reconnect, the BMS will not attempt any further
reconnections. The Battery Module can be restarted using the module power switch and run button,
however, if the external fault condition which caused the Battery Module to shut down is not rectified, the
battery will continue to enter the shutdown mode.
12. If the current of one cluster is larger than the current limit, the battery system will send a warning in
accordance with the single module BMS logic.
Modules Clusters 1234567
1100 196 288 376 460 540 616
2196 376 540 688 820 936 1036
3288 540 756 936 1080 1188 1260
4376 688 936 1120 1240 1296 1400
5460 820 1080 1240 1300 1500 1750
6540 936 1188 1296 1500 1800 2100
7616 1036 1260 1400 1750 2100 2450
8688 1120 1296 1600 2000 2400 2800
9756 1188 1350 1800 2250 2700 3150
10 820 1240 1500 2000 2500 3000 3500
11 880 1276 1650 2200 2750 3300 3850
12 936 1296 1800 2400 3000 3600 4200
13 988 1300 1950 2600 3250 3900 4550
14 1036 1400 2100 2800 3500 4200 4900
15 1080 1500 2250 3000 3750 4500 5250

LV-HUB V2.01 14/06/2022
CAN Hub General System Description
CAN Hub is Mandatory for Multiple Cluster Installation
ATTENTION:
BEFORE PROCEEDING WITH THE 4K4 PRO & 5K3LVHV INSTALLATION IT IS MANDATORY TO READ THE
INSTRUCTIONS BELOW
Special BUS Bar for Parallel Configuration
(MODULES INTERCONECTION BUS BAR MODEL –ACCESSORY)
4K4 PRO BUSBAR 5K3LVHV or XP BUSBAR
ATTENTION: BUS BARS ARE MANDATORY FOR STACK SYSTEM WITHIN 300A (Refer to the 5K3 manual).
ATTENTION: DO NOT USE DIFFERENT BUS BAR TYPES OR CABLES.
ATTENTION: EACH BATTERY MODULE AND EACH CLUSTER MUST HAVE THE SAME SoC% and
VOLTAGE. ALL THE BATTERY MODULES MUST HAVE THE SAME FIRMWARE.

LV-HUB V2.01 14/06/2022
Multi Cluster Configurations for 4K4 and 5K3 LV/HV
Before using the MASTER HUB device, make sure to update the modules with the latest update Firmware available
on www.wecobatteries.com
Touse and set up the MASTER HUB, the installer must follow the instructions contained in this manual.
1. It is possible to stack from a minimum of three modules per cluster to a maximum of 8 modules for 4k4 pro and 5k3 LV/HV
2. It is possible to create up to 5 clusters with a maximum of 8 modules each for a total of 40 batteries for the 4k4PRO and
5K3 XP
3. All the battery modules of each cluster must have all the DIP Switches set by set as per the parallel sequence showed in
the manuals of each model.
4. The master module of each cluster that needs to be addressed with the specific cluster ID via PC software.
Each master battery of each cluster needs to be assigned with a unique and progressive ID as shown below.
5. The first cluster will have the ID 01 and needs to be connected from the CAN-B PORT to the CAN-A PORT of the consecutive
Cluster that will have the ID02. Proceed with the Daisy Chain connection between Clusters up to the last.
6. From the master battery, of the last cluster needs to be connected the HUB from the CAN-B PORT to the CAN INPUT
PORT of the HUB.
7. The Connection of the power cables between HUBs must be executed in accordance with the previous instruction.
8. The HUB can be powered with 2 x 6mm² cables from the common bus bar to the INPUT terminal of the HUB.
9. The HUB is connected via CAN to the inverter from the HUB CAN-BMS PORT.
10. Press the RUN Button of ALL batteries of each Cluster for wake up the batteries.
11. When all the connections have been completed, it is possible to turn on the HUB with the POWER SWITCH.
12. According to the numbers of modules connected, the entire startup procedure could take up to 320 seconds to be
completed.
Module Set Up
Each battery module must have the same Voltage, SOC% and Firmware.
The battery firmware must be the version” FW-V4.48” available on the web site :
https://wecobatteries.com/download-area/#104-106-battery-firmware-for-wehub
Firmware upgrade operation ( each battery need to be upgraded with the special HUB FIRMWARE VERSIO)
This FW is valid for both 4K4 PRO and 5K3-LV/HV
For this setting use only the WeCo RS 232 CONVERTER
Launch the WeCo software > Select Module setting program > Select the Com port and connect to the battery get info >
Click Search new firmware > Select the firmware > Load Firmware > wait for the upgrade completion > The Green bar
Show the upgrading status > Pop up the window show Upgrade success.
SOFTWARE FOR HUB SET
WeCo RS 232 CONVERTER

LV-HUB V2.01 14/06/2022
STEP BY STEP PROCEDURE
Do not turn on the batteries until the entire system has been connected with the BUS BAR between modules and the Power cable is connected
to the common bus bar or to the inverter
1. Stack all the modules in positions (Verify the load with a local civil engineer).
2. Connect each module to GND and to the Master GND node.
3. Assign each MASTER with a progressive ID via the PC software (max 5 Clusters).
4. Connect the MASTER ID01, starting from the CAN-B PORT to the CAN-A PORT of MASTER ID02 and proceed up
to the last MASTER.
5. Connect the LAST MASTER from the CAN-B PORT to the CAN INPUT PORT of the HUB.
6. Connect the CAN-BMS PORT with the INVERT CAN PORT (follow the PIN OUT provided by the Inverter manufacturer
for CAN L CAN H).
7. Set the cluster batteries DIP switch according to the parallel configuration. (*more detail checks the 4k4pro or 5K3 manual)
8. Connect the RS485 from PORT B of the MASTER to the PORT A RS485 of the SUB1 and proceed in Daisy Chain up to
the last module.
9. Turn ON the HUB Switch.
10. Press the POWER BUTTON on all modules for 2-seconds to start the wake-up process on all SUB modules.
BATTERY SOFTWARE SET UP PROCEDURE
STEP 1, Upgrade all the batteries with the FW version 4.48
•Access the Software and select the Low Voltage section, click on the FREE ACCESS button
•Select the Battery image ``MODULE SETTING PROGRAM``
•Set the COM port and Press CONNECT
•Select SEARCH NEW FIRMWARE and LOAD the FW 4.48, the Press UPGRADE FIRMWARE
Repeat the same UPGRADE to all the batteries of each cluster

LV-HUB V2.01 14/06/2022
CONNECTING WITH THE BATTERY
LAUNCH THE FW UPGRADE

LV-HUB V2.01 14/06/2022
Cluster set up
Master ID Set Up and Connection Diagram
DIP SETTING SEQUENCE VALID FOR 4K4 PRO and 5K3 LV HV ( Not VALID FOR 5K3-XP)
It is important to follow the diagrams below to make the connections in the correct sequence.
Each cluster must have its own unique address, check the DIP chart for CLUSTER 01 and CLUSTER 02~05.
All the batteries in the group FOLLOW the DIP address chart below (see picture):
DIP ADDRESS CHART (CLUSTER 01*)
DIP ADDRESS CHART (CLUSTER 02 to 5*)
WARNING
Only the first batteries of each cluster must be set following the sequence from ID 01 to ID 05 to then assigning the ID number via the
PC SOFTWARE and allowing the HUB to detect the exact number of cluster that is composing the system.
CLUSTER 01
CLUSTER 02 to
05
THE MASTER BATTERY OF EACH CLUSTER MUST BE SET ACCORDING AS PER THIS DIP CONFIGURATIONS
ORDER TO
CLUSTER 1*
CLUSTER 2**
CLUSTER 3
CLUSTER 4
CLUSTER 5

LV-HUB V2.01 14/06/2022
ATTENTION
All the master batteries must be connected in Daisy Chain from the first module to the last module, connecting the CAN PORTS
CAN-B and CAN-A to the last module from the CAN-B PORT for connection to the HUB PORT -CAN INPUT-
CLUSTERS DIP SETTING FOR 4K4 PRO
ATTENTION
It is important to restart the batteries after any DIP setting to
complete the setup of each single module
CLUSTE
R ID 01
CLUSTER
ID 02
CLUSTER
ID 03
CLUSTER
ID 04
CLUSTER
ID 05
HUB
Master
DIP
CAN-B To CAN-A
CAN-B To CAN-INPUT
CAN-B To CAN-A
CAN-B To CAN-A
CAN-B To CAN-A
CAN-
BMS to
INVERT
ER
SLAVES
For the Slaver need to
follow the DIP
sequence as normal
MASTERS
Each Cluster
need to be
assigned with
DIP sequence
indicated
above

LV-HUB V2.01 14/06/2022
ATTENTION
All the master batteries must be connected in Daisy Chain from the first module to the last module, connecting the CAN PORTS
CAN-B and CAN-A to the last module from the CAN-B PORT for connection to the HUB PORT -CAN INPUT-
CLUSTERS DIP SETTING FOR 5K3 LV/HV
ATTENTION
It is important to restart the batteries after any DIP setting to
complete the set up of each single module
CLUSTER
ID 01
CLUSTER
ID 02
CLUSTER
ID 03
CLUSTER
ID 04
CLUSTER
ID 05
HUB
Master
DIP
SLAVES
For the Slaver need to
follow the DIP
sequence as normal
MASTERS
Each Cluster
need to be
assigned with
DIP sequence
indicated above

LV-HUB V2.01 14/06/2022
Cluster Setting operation
*For this setting use only the WeCo RS 232 CONVERTER
and the HUB SOFTWARE using the PASSWORD: 1010
Launch the WeCo software > Select Cluster setting program > Select the Com port and connect the battery get info >
•Make sure that all the Firmware version are consistent
•Make sure that all the SoC are at the same Value * suggested 100%
•Make sure that the modules voltage are levelled
•If one of the above values is not aligned with the others, the installer must clear the imbalance by acting individually
on each module
•When all of the three sections are in Green Status will be possible to proceed to the next step.
SOFTWARE OVERVIEW
CLUSTER OVERVIEW
Select the cluster ID and assign the ID (Each master of each cluster must have an ID assigned)
•From the Overview page it is possible to check the status of the cluster and assigning the ID by connecting the
RS232 Converter to the Master Battery of the cluster
•Select the Cluster from the Drop List starting from 1 and press SET, the ID is now assigned to the first Cluster
Repeat the same actions to all the clusters

LV-HUB V2.01 14/06/2022
ATTENTION
If the Modules that are composing the clusters are not consistent with the rest of the cluster, the software will highlight
the problem and to proceed it will be necessary to clear any error
SYSTEM OVERVIEW
By selecting the WE HUB icon from the software, after plugging the RS232 converter on the Cluster
Number 01 ( ID-1) it will be possible to have a general overview of the system as shown below
Below and example of two clusters composed by 3 modules each.

LV-HUB V2.01 14/06/2022
Communication Diagram + Power Connection
4K4 PRO
*The cluster can be composed by 8 batteries in parallel, this diagram take 5 modules in parallel as example.
ATTENTION:
Each cluster must be equipped with an isolator to individually disconnect
(circuit breaker) the battery tower from the parallel bus bar in accordance with
local regulations.
Master Inverter
NEGATIVE POWER
CABLES
2X50/75mm²
POSITIVE POWER
CABLES
2X50/75mm²
PARALLEL BUS
BAR
CAN INPUT FROM
LAST CLUSTER
GROUND CABLES
10mm²
RS485 PARALLEL
RJ45 Cable
DATA COMM
CUSTER 01
CUSTER 02

LV-HUB V2.01 14/06/2022
EXAMPLE of 4K4 PRO
Conceptual Diagram of a Cluster composed of 5 clusters of 5 batteries each.
*Can be composed of 5 clusters of max. 8 batteries each.
SUB n
SUB 1
MASTER
CAN BMS
INVERTER CIRCUIT
BREAKER
Positive and Negative
(According to local
electrical codes)
POWER LINE MAX 60Vdc
CUSTER 01
CUSTER 02
CUSTER 03
CUSTER 04
CUSTER 05

LV-HUB V2.01 14/06/2022
Communication Diagram + Power Connection
5K3-LVHV ( not valid for 5K3 XP)
ATTENTION:
Each cluster must be equipped with an isolator to individually disconnect (circuit breaker) the
battery tower from the parallel bus bar in accordance with local regulations.
Master Inverter
NEGATIVE POWER
CABLES
2X50/75mm²
POSITIVE POWER
CABLES
2X50/75mm²
GROUND CABLES
10mm²
RS485 PARALLEL
RJ45 Cable
DATA COMM
GROUND CABLES
10mm²
CUSTER 01
CUSTER 02