Growatt ARK LV HUB-A1 User manual

Shenzhen Growatt New Energy Co., Ltd
4-13/F,Building A,Sino-German (Europe) Industrial Park,
Hang cheng Ave,Guxing Community,Xixiang Subdistrict,
Bao’an District, Shenzhen, China
[phone]
www.ginverter.comwww.ginverter.com
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Manual
Growatt New Energy Residential Energy Storage User Manual
ARK LV HUB-A1 Low Voltage Battery Hub
GR-UM-243-A-00

Contents
1 Product Overview
2 Safety
2.1 Basic security
2.2 Safety Precautions
2.3 Warning Labels
2.4 Emergency Responses
3 Installation
4 Power on and off the ARK LV
HUB-A1 4 1 Power On
4.2 Power off
.
5 System Failure Information
List and Troubleshooting
Suggestions
6Technical Specifications
Appendix I
1.1 Intended Use
1.2 Appearance
1.3 Working Principle and Function
3 1 Installation environment
3.2 Basic Installation Requirements
3.3 Installation Required Tools
3.4 Installation Procedures
3.5 Electrical Connection
.
About this Document
This document describes the installation, electrical connection, operation, commission,
maintenance and troubleshooting of ARK LV HUB-A1 Low Voltage Battery Hub (hereafter
simply put ARK LV HUB-A1). Before installing and operating ARK LV HUB-A1, ensure that
you are familiar with product features, functions, and safety precautions provided in this
document.
Symbol
Description
Indicates a potentially hazardous situation, if not avoided, could result
in serious injury or death.
WARNING

The ARK LV HUB-A1 is designed to be applied to multiple batteries in parallel. It supports
the information collection of 8 groups of parallel batteries and sends to the energy
storage unit, summarize the temperature, current and other communication functions of
the batteries. The following specifically introduces the content of ARK LV HUB-A1.
1.2 Appearance
1 Product Overview
1.1 Intended Use
ARK LV HUB-A1 consists of information summary module, busbar and mechanical parts.
Product appearance is shown as below.
Fig 1.1: Dimension
12
1.3 Working Principle and Function
ARK LV HUB-A1 is a battery group parallel control unit, composed of control module,
busbar, power button and mechanical parts. A maximum of 8 battery groups connected
in parallel to increase the capacity and power of the battery system. It real-time
communication with PCS (Power Conversion System) and BMS (Battery Management
System) via CAN.
ØMonitoring : battery voltage, temperature, current detection.
ØProtection and Alarm: protection and alarm when overvoltage, under voltage, over
current, over-temperature or under temperature occurs. See Appendix I for details.
ØReport: report all alarm and status data to PCS.
ØParallel connection: support up to 8 battery groups in parallel.
ØPassive balance function.
Dimension (unit: mm)
Safety 2
Safety information contains in this section must be observed at all times when working
on or with this product. For safety, installers are responsibility to familiarize themselves
with this manual and all warnings before installation.
2.1 Basic security
The product has been designed and tested in strict rules with international safety
certification requirements. Read all safety instructions carefully before any work and
obey the rules at all times when working on or with the product. Growatt shall not be
liable for any consequence caused by the violation of the following:
Damage occurred during transportation.
Incorrect transportation, storage, installation and use, or customer fails to convey the
correct information about transportation, storage, installation and use to terminal
customers.
Non-professional installation.
Failure to obey the rules of this operation instructions and safety precautions in this
document.
Unauthorized modifications or removal of the software package.
Product tamper label is damaged or product with any part missing (except the
authorized dissemble parts).
Operation in extreme environments which are not allowed in this document.
Repair, disassemble, or change product without authorization and cause failure.
Damage to shell labels or modifies date of production.
Damages due to force majeure (such as lightning, earthquakes, fire, and storms).
Warranty expiration.
2.2 Safety Precautions
2.2.1 Environment requirements
Do not expose the ARK LV HUB-A1 to temperature above 50℃or heat sources.
Do not install or use the ARK LV HUB-A1 in wet locations, moisture, corrosive gases or
liquids, such as bathroom.
Please install indoors, outdoor installation is not supported.
Place ARK LV HUB-A1 in safe place away from children and animals.
Power terminals shall not touch conductive objects such as wires.
Pack should not be in contact with liquid.
2.2.2 Operation Precautions
Do not touch the ARK LV HUB-A1 with wet hands.
Do not disassemble the ARK LV HUB-A1 without permission.
Do not crush, drop or puncture the ARK LV HUB-A1.
Store ARK LV HUB-A1 in accordance with this manual.
Ensure the connection of ground wire reliable.
Remove all metal objects such as watches and rings that could cause a short-circuit
before installation, replacement and maintenance.
The ARK LV HUB-A1 shall be repaired, replaced or maintained by skilled personal that has
been recognized.

34
2.3 Warning Labels
Symbols
Description
Do not dispose in trash
Lithium ion battery can be recycled
Certification in European union area
Fig 2.1: Nameplate
2.4 Emergency Responses
Manufacturer takes foreseeable risk scenarios into consideration and is designed to
reduce hazards and dangers. However, if the following situation occurs, do as below:
Situation Occurs
Description and action need
Wet Packs
If ARK LV HUB-A1 is flooded or submerged, do not access it. Contact
Growatt or distributor for technical assistance immediately.
Damaged ARK LV
HUB-A1
Damaged ARK LV HUB-A1 is dangerous and must be handled with
special attention. They are no longer suitable for use and may cause
danger to people. If the ARK LV HUB-A1 damaged, stop use it and
contact Growatt or distributor.
When storing or handling ARK LV HUB-A1, do not stack ARK LV HUB-A1 without
package.
Packaged ARK LV HUB-A1 should not be stacked more than specified number stipulated
on the packing case.
3.1 Installation environment
ØThe ambient temperature for the installation of the battery system shall be above -
10℃, below 50℃, and the humidity shall between 5% and 95%. Indoor installation, do
not install outdoors.
Storage and Transportation 3
ØEnsure to read the Guidance before installation in order to
understand product information and safety cautions;
ØOperators should be well trained technicians and fully
understand the whole photovoltaic system, grid network, working
principle and national regional standards;
ØInstallers must use insulating tools and wear safety equipment;
ØDevice damages caused by failure to comply with storage,
transportation, installation and use requirements specified in
Guidance are not coved by Warranty.
WARNING
Max.+50℃Min.-10℃RH.+5%~+95%
Fig 3.1: Installation environment requirements
3.2 Basic Installation Requirements
ØARK LV HUB-A1 can only be installed indoors. The following conditions are allowed:
Fig 3.2: Acceptable wall mounted installation

56
3.3 Installation Required Tools
The following tools are required to install the ARK LV HUB-A1:
Drill Screw Driver Wrench Pencil
Tap Measure Multimeter 5mm Allen key
It is recommended to wear the following safety gear when dealing with the PACK.
Insulated Glove Safety Goggle Safety Shoes
3.4 Installation Procedures
Pre-installation Check
Check the package
Check the ARK LV HUB-A1 package before open it. If any abnormity
is detected, do not open the Package and contact your distributor.
Check deliverable
Check the quantity of all parts inside according to the package list.
If there is any part missing or damaged, please contact your
distributor.
Check Packing List
ARK LV HUB-A1
Communication line to PCS
Terminal X32
M6 explosive screw X2
M4 X14 com bination screw X2
Certification X1
Warranty Card X1
Operation Manual X1
Quick installation Manual X1 Key X2
Installation
Fig 3.3: Multiple ARK LV HUB-A1 installation process
Step 1: Please make sure that the thickness of the wall for ARK LV HUB-A1 installations
more than 120mm.
Step 2: Place the wall hangers on the wall and mark the holes that need to be punched.
Each wall hanger has two fixed positions. After mark the holes, put down the wall
hangers.
Step 3: Drill a hole at the marked point with a depth of 55mm at the mark with a drill of
φ8. Place the wall hangers and expand the bolt with a hammer into the hole in the wall,
install the nut (including elastic flat pad) and tighten the nut with a wrench.
Step 4: Hang the ARK LV HUB-A1 on the wall hangers and install the safety screws
(M4x10 Combination screw) on both sides of ARK LV HUB-A1.

78
3.5 Electrical Connection
Do not forget wear ESD wrist strap and gloves, safety gloves and
goggles.
WARNING
Terminal Definition:
Serial number
Item
Specifications
Symbol
1
Positive terminal
IP67–Red connector
BAT+
2
Positive terminal
IP67–Red connector
BAT+
3
Communication Port
IP67 RJ45water proof
connector
COM OUT
4
Communication Port
IP67 RJ45water proof
connector
COM IN
5
Grounding terminal
M6 Screw
6
Negative terminal
IP67 –Black connector
BAT-
7
Negative terminal
IP67 –Black connector
BAT-
8
USB interface
USB interface for Program
Upgrade
USB
9
LED interface
Five leds
Status
10
POWER button
IP20—Button to turn on or
off the ARK LV HUB-A1
POWER
11
LOCK
TURN OFF
KEY
RS485&CAN crystal plug definition：
Item
Crystal head picture
Serial no.
Definition
COM OUT
1
RS485_B
2
RS 485_A
3
GND_COM
4
CANH
5
CANL
6
GND_COM
7
WAKE-
8
WAKE+
Communication interface definition:
1
22
23 26
24 25 27 9 2
11 2
10 8
Fig 3.4: Terminal Definition
System connection diagram
GROUP 1
battery 1
battery 2
battery N
GROUP N（N≤8）
Breaker
（N≤10 ）
Note:
1. Each battery group
can configure
maximum 10 pcs
batteries.
2. When the power
wiring harness is
connected, please pay
attention to the
positive and negative,
configures maximum
8 battery groups.
3. The top battery of
each group is master
battery, and the PCS
CAN communication
port of each master
battery should be
connected to COM-IN
of ARK LV HUB-A1.
Fig 3.5: System connection diagram
4. COM-OUT of ARK LV HUB-A1 should be
connected to CAN communication port of PCS.
5. To ensure system security, do not forget to
install ground wire.
6. When connecting the power wiring harness,
please pay attention to the positive and
negative.

910
HUB-A1
4Power on and off the ARK LV
4.1 Power On
System Failure Information List
and Troubleshooting Suggestions
6
WARNING
ØThe installation and use of ARK LV HUB-A1 involve much specialized
knowledge. Therefore, technicians should be given appropriate technical
training and obtain operational certificates in compliance with local laws
and regulations. Please ensure technicians have obtained training
certificate before operation.
ØPlease stand on dry insulating objects and do not wear conductive
material such as watches and necklace during operation. Insulated tools
should be used.
ØDo not contact any positions with potential difference.
ØProhibition sign should be hung on the ARK LV HUB-A1: " Non -
professionals, do not touch.
ØIf any abnormalities occur during the startup phase, power off the
battery and PCS immediately. After problem confirmed, proceed again.
ØMake sure the breaker and battery are turned off before checking the
ARK LV HUB-A1.
Error
Indication
Error
description
Error cause
Suggested actions
ALM
（ ALM
Light
Flickers）
COM OUT
Communication
failure
Communication loss
between ARK LV HUB-
A1 and PCS
1. There is no safety threat, and the
user should stop using the battery
system.
2. Check whether the
communication terminals of ARK LV
HUB-A1 and PCS are connected
correctly.
3. If the ARK LV HUB-A1 and PCS
cannot communicate after
confirming that the communication
line is connected correctly, the user
should contact the installer to repair
the ARK LV HUB-A1.
COM IN
Communication
failure
Communication loss
between ARK LV HUB-
A1 and PACK.
1. There is no safety threat, and the
user should stop using the battery
system.
2. Check whether the
communication terminals of ARK LV
HUB-A1 and PACK are connected
correctly.
3. If the ARK LV HUB-A1 and PACK
cannot communicate after
confirming that the communication
line is connected correctly, the user
should contact the installer to repair
the ARK LV HUB-A1.
Battery group
power line is not
wired.
The battery groups
starts normally but
the power line is not
connected.
1. Check whether the power line of
ARK LV HUB-A1 and PACK are
connected correctly.
2. If the ARK LV HUB-A1 still reports
the fault after confirming that the
power cord is connected correctly,
the user should contact the installer
to repair the ARK LV HUB-A1.
Large load
pressure
difference
between groups.
The voltage
difference between
the maximum load
voltage and the
minimum load
voltage of the battery
group is greater than
2V.
1. Check whether the power line of
ARK LV HUB-A1 and PACK are
connected correctly.
2. Check whether the voltage
difference between the maximum
load voltage and the minimum load
voltage of the battery group is
greater than 2V.
3. If the ARK LV HUB-A1 still reports
the fault after confirming that the
power cord is connected correctly,
the user should contact the installer
to repair the ARK LV HUB-A1.
Serial
Procedures
1
Turn on the Rocker switch.
2
Press the battery power button
for three to eight seconds.
1. If both RUN/ALM and quantity lights turn on normally, ARK LV HUB-A1 is powered on
successfully.
2. If RUN/ALM light turns red, there is a failure and should solve it before power on again.
4.2 Power off
Serial
Procedures
1
Press once the battery power
button.
2
Turn off the Rocker switch.
Turn off the batteries, the five LED lights are off, indicating that the ARK LV HUB-A1 has
been powered off.
Note: Turning the switch button of the ARK LV HUB-A1 to OFF does not turn off the
power in the ARK LV HUB-A1 but only communication.

11 12
6 Technical Specifications
Functional parameters of ARK LV HUB-A1 Energy Storage System are as shown below:
No.
Items
Specification
1
Module
ARK LV HUB-A1
2
Operating Voltage
40 - 60VDC
3
Max charging current
800A
4
Max. discharging current
800A
5
Operative temperature range
-20~+60℃
6
Storage conditions
Temperature: -10°C ~ +50°C
Humidity：5%~95%RH
7
Cooling
Natural cooling
8
Dimension (W/D/H)
600/250/130mm
9
Weight
3kg
10
Installation
Wall-mounted installation
11
Warranty
15 Years
12
Ingress protection
IP20
13
Safety certification
IEC61000/ EN61000
14
Communication port
CAN/RS485(Optional)
15
Parallel connection
Max 8 Battery groups
Appendix I
LED indication Control Mechanism
LED light definition
Status
Items
SOC indication
RUN/ALM
Remark
LED1
LED2
LED3
LED4
LED5
Number of
battery
group in
parallel
1
One group
online
2
Two groups
online
3
Three groups
online
4
Four groups
online
5
Five groups
online
6
Six groups
online
7
Seven groups
online
8
Eight groups
online
Parallel
connection
Parallel
connection
succeeds
RUN/ALM light
flicker green
Fault,
personnel
handling
required
Number of
battery
group
connected
in parallel
are
reduced.
LED1-LED4 indicate the current
number of battery groups in
parallel.
(t=1S)
RUN/ALM light
flicker green
Battery
group
power line
is not
wired.
(t=1S)
RUN/ALM light
flicker red
COM OUT
communic
ation
abnormal.
(t=1S)
RUN/ALM light
flicker red
COM IN
communic
ation is
abnormal.
(t=1S)
RUN/ALM light
flicker red