DISCOVER LYNK II User manual

1805-0041 REV A
(950-0025)
LYNK II SMA SUNNY ISLAND
USER MANUAL

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1. AUDIENCE, SAFETY, MESSAGES, AND WARNINGS ......................................3
1.1 Audience.................................................................3
1.2 Warning, Caution, Notice, and Note Messages..................................3
1.3 General Warnings .........................................................4
1.4 Safe Handling Procedures...................................................4
1.5 Personal Protective Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2. DOCUMENTATION...................................................................5
3. OVERVIEW .........................................................................6
3.1 System Overview..........................................................6
3.2 Compatibility .............................................................7
3.3 Minimum Battery System Capacity ...........................................7
4. LYNK II CAN HARDWARE TERMINATION AND CAN OUT PIN CONFIGURATION..............8
4.1 LYNK II CANTermination ....................................................8
4.2 LYNK II CAN Out - RJ45 Pin Assignments for Sunny Island Inverters ................9
4.3 Off-grid System Components ................................................9
4.4 Battery Protection – Off-grid ................................................10
4.5 Battery Protection - Self-Consumption........................................10
5. INSTALLING AND CONNECTING LYNK II TO THE SMA NETWORK ........................ 11
5.1 Networking Discover Lithium Batteries with LYNK II Gateway ....................11
6. ENABLING LYNK II TO COMMUNICATE WITH SMA SUNNY ISLAND DEVICES .............. 12
6.1 Connecting LYNK II to the SMA Network......................................12
6.2 LYNK II and Sunny Island NetworkTerminations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.3 Sunny Island BatteryTemperature Sensor.....................................13
6.4 Setting the LYNK II Communication Protocol to CANbus .........................13
7. CONFIGURING SUNNY ISLAND ...................................................... 14
7.1 Setting Up Sunny Island 4548-US and 6048-US ................................14
7.2 Setting Up Sunny Island 4.4M, 6.0H, and 8.0H with Legacy Sunny Remote Control ...15
7.3 Setting Up Sunny Island 4.4M, 6.0H, and 8.0H from the Integrated Web Interface ....16
7.4 LYNK II and Sunny Island Communication ....................................17

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Introduction
This Application Note provides information about integrating network-enabled
Discover Lithium Batteries using the LYNK II Communication Gateway with SMA
Sunny Island inverter-chargers.
1. AUDIENCE, SAFETY, MESSAGES, AND WARNINGS
1.1 Audience
Configuration, installation, service, and operating tasks should only be performed
by qualified personnel in consultation with local authorities having jurisdiction
and authorized dealers. Qualified personnel should have training, knowledge, and
experience in:
• Installing electrical equipment
• Applying applicable installation codes
• Analyzing and reducing hazards involved in performing electrical work
• Installing and configuring batteries
• Installing and configuring systems activated by relays
1.2 Warning, Caution, Notice, and Note Messages
Messages in this manual are formatted according to this structure.
Additional information concerning important procedures and features of
the product. Read all the instructions before installation, operation, and
maintenance.
Important information regarding hazardous conditions.
WARNING
Important information regarding hazardous conditions that may result in personal
injury or death.
CAUTION
Important information regarding hazardous conditions that may result in personal
injury.
NOTICE
Important information regarding conditions that may damage the equipment but
not result in personal injury.
NOTE
Ad hoc information concerning important procedures and features unrelated to
personal injury or equipment damage.

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1.3 General Warnings
Do not crush, disassemble or dispose of the battery module in fire or the
garbage.
This product is made of recyclable materials and must be recycled.
WARNING
ELECTRIC SHOCK AND FIRE HAZARD
• This equipment must only be installed as specified.
• Do not disassemble or modify the battery.
• If the battery case has been damaged, do not touch exposed contents.
• There are no user-serviceable parts inside.
Failure to follow these instructions may result in death or serious injury.
WARNING
ELECTRIC SHOCK AND FIRE HAZARD
• Do not lay tools or other metal parts on top of the battery or across the terminals.
Failure to follow these instructions may result in death or serious injury.
CAUTION
ELECTRIC SHOCK
• Do not touch the energized surfaces of any electrical component in the battery
system.
• Before servicing the battery, follow all procedures to fully de-energize the battery
system.
• Follow the “Safe Handling Procedures” below when working with the battery.
Failure to follow these instructions may result in injury.
1.4 Safe Handling Procedures
Before using the battery and any power electronics, read all instructions and
cautionary markings on all components and appropriate sections of their manuals.
• Use personal protective equipment when working with batteries.
• Do not dispose of the battery in a fire.
• Promptly dispose of or recycle used batteries following local regulations.
• Do not disassemble, open, crush, bend, deform, puncture or shred.
• Do not modify, re-manufacture, or attempt to insert foreign objects into the
battery, immerse or expose the battery to water or other liquids, fire, explosion,
or other hazards. If the user suspects damage to the battery module due to water,
heat, or other reason, take it to a service center for inspection.
• Only use the battery for the system for which it is specified.

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• Do not lift or carry the battery while in operation.
• When lifting a heavy battery, follow the appropriate standards.
• Only lift, move, or mount following local regulations.
• Take care when handling battery terminals and cabling.
• Only use the battery with a charging system that meets specifications. Using a
battery or charger that does not meet specifications may present a risk of fire,
explosion, leakage, or other hazards.
• Do not short-circuit a battery or allow metallic conductive objects to contact
battery terminals.
• Replace the battery only with another battery that has been qualified for the
system. Using an unqualified battery may present a risk of fire, explosion,
leakage, or other hazards.
• Do not drop the device or battery. If the device or battery is dropped, especially
on a hard surface, and the user suspects damage, take it to a service center for
inspection.
1.5 Personal Protective Equipment
When handling or working near a battery:
• Use Personal Protective Equipment, including clothing, glasses, insulated gloves,
and boots.
• Do not wear rings, watches, bracelets, or necklaces.
2. DOCUMENTATION
This Application Note provides information about integrating LYNK and AEbus
network-enabled Discover Lithium Batteries using the LYNK II Communication
Gateway with SMA Sunny Island Solar inverter-chargers.
Before installation and configuration, consult the relevant product documentation,
including Manuals, Application Notes, and Installation and Configuration Guides.
SMA Reference Documents
• Operating Manual Sunny Island 4548-US / 6048-US (en-21)
• Operating Manual Sunny Island 4.4M / 6.0H / 8.0H (en-14)
• Installation Manual Sunny Island 4.4M / 6.0H / 8.0H (en-33)
Visit https://www.sma.de/en/ for the most recent version of published documents.
Discover Battery Documentation
Visit http://discoverbattery.com for the most recent version of published documents,
including Discover Lithium battery user manuals and the LYNK II Installation and
Operation Manual (805-0033).

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3. OVERVIEW
This manual provides general settings and is not a comprehensive guide to the
programming and configuration of a specific installation. An installation may
have unique conditions or use cases that require modification or adaptations of
values. Installers must be capable of reviewing and adapting to the specifics of an
installation and its specific use case and optimizing settings where needed.
• Review and confirm equipment compatibility and correct sizing.
• Configure the LYNK II Communication Gateway’s CAN out pins to match the CAN
in pins of the power conversion equipment.
• Mount the LYNK II Gateway, connect the Discover battery communication
network to either the LYNK Port or AEbus Port, and then connect the CAN Out
Port to the power conversion equipment’s communication network.
• Terminate all networks correctly.
• Set the LYNK II Gateway using LYNK ACCESS software to the correct protocol
to enable closed-loop communication between the Discover batteries and the
power conversion equipment.
• Set up user preferences and enable the use case using the power conversion
control system.
3.1 System Overview
The LYNK II Communication Gateway unlocks the full potential of a Discover
Lithium battery by enabling the internal Battery Management System (BMS)
to provide real-time data in a closed-loop configuration to other devices. This
configuration allows hybrid inverter-chargers and solar charge controller systems
to optimize control over the charging process in solar applications. LYNK II also
enables the remote monitoring of Discover Lithium battery SOC and data logging
of multiple sites using the data monitoring services offered by off-grid inverter
systems.
Discover Lithium batteries must be set up to work with SMA Sunny Island Inverter-
Chargers in a closed-loop configuration. In a closed-loop configuration, the BMS of
the Discover Lithium battery sends battery status over a network data connection
with the SMA Sunny Island Inverter-Charger. The SMA Sunny Island Inverter-
Charger uses the Discover Lithium battery BMS data to finetune the output of the
charger and deliver other functional controls based on battery voltage, temperature,
and percent State-of-Charge.
If communication is interrupted between the BMS and SMA Sunny Island Inverter-
Charger, after about 1 minute the power conversion device throws a fault (F952
MalfunctionExtBMSTimeout). Once communication is re-established, power
conversion device operations resume.
NOTICE
• SMA Sunny Island Inverter-Charger cannot be operated in an open-loop
configuration with Lithium batteries based on voltage-only charge settings.

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BATTERY
LYNK
LYNK Bus / AEBus
DC Negative (-)
Power Electronics Communications
DC Positive (+)
POWER ELECTRONICS
Figure 1. LYNK to SMA Sunny Island
3.2 Compatibility
LYNK II Communication Gateway is compatible with the following:
Discover Lithium Batteries
• AES LiFePO4: 42-48-3000, 42-48-6650
• HELIOS ESS: 46-48-1540
SMA Solar
• Sunny Island 4.4M
• Sunny Island 6.0H
• Sunny Island 8.0H
• Sunny Island 4548-US
• Sunny Island 6048-US
3.3 Minimum Battery System Capacity
Battery charge and discharge rates are managed automatically by the Discover
Lithium Battery and SMA Sunny Island device. Using large solar arrays with battery
banks that are too small can exceed the operating limits of the battery to charge
and possibly lead to the BMS triggering over-current protection. Curtail the charging
below the operational limit of the installed batteries, or the battery capacity must
accept the maximum charge current of the system. Calculate this value by adding
the charge capacities of all inverter-chargers and solar charge controllers in the
system. Additionally, battery peak capacity must support the surge requirements
demanded by the load attached to the inverter. Match all inverter peak power values
with the sum of all battery peak battery current values.

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Inverter Peak Amps DC = (Inverter Surge W) / (Inverter Efficiency) /
(48V: Low Battery Cut-Off)
Model Inverter
Peak
(3s)
Max
Discharge
Current
(1m)
Max
Charge
Current
44-48-3000
Minimum
Single phase
(Three phase)
42-48-6650
Minimum
Single phase
(Three phase)
46-48-1540
Minimum
Single phase
(Three phase)
Sunny Island
4548-US1242 A 185 A 110 A 4 (10) 2 (5) 4 (11)
Sunny Island
6048-US2242 A 185 A 140 A 4 (10) 2 (5) 5 (14)
Sunny Island
4.4M-133121A 106 A 75 A 2 (6) 1 (3) 3 ( 8 )
Sunny Island
6.0H-134243 A 165 A 110 A 3 (9) 2 (4) 9 (11)
Sunny Island
8.0H-135243A 212 A 140 A 3 (14) 2 (5) 11 (14)
1 Calculated based on max 11000W at 120 VAC 3-second output, 8400W at 120VAC 1-minute output, efficiency
94.5% (CEC), and 100A DC max charging, as published in SMA manual SI4548-6048-US-BE-en-21.
2 Calculated based on max 11000W at 120 VAC 3-second output, 8400W at 120VAC 1-minute output, efficiency
94.5% (CEC), and 140A DC max charging, as published in SMA manual SI4548-6048-US-BE-en-21.
3 Calculated based on max 5500W at 230 VAC 3-second output, 4800W at 120VAC 1-minute output, efficiency 94.0%
(European weighted), and 75A DC max charging, as published in SMA manual SI44M-80H-13-BE-en-14.
4 Calculated based on max 11000W at 230 VAC 3-second output, 7500W at 120VAC 1-minute output, efficiency
94.3% (European weighted), and 110A DC max charging, as published in SMA manual SI44M-80H-13-BE-en-14.
5 Calculated based on max 11000W at 230 VAC 3-second output, 9600W at 120VAC 1-minute output, efficiency
94.1% (European weighted), and 140A DC max charging, as published in SMA manual SI44M-80H-13-BE-en-14.
4. LYNK II CAN HARDWARE TERMINATION AND CAN OUT PIN
CONFIGURATION
4.1 LYNK II CAN Termination
Jumpers configure termination for AEbus and LYNK Network and the CAN Out pin
assignments. Follow the LYNK II Installation and Operation Manual (805-0033) to
learn how to access and configure the header board with jumpers.
Detailed pin configurations are included in the LYNK II Manual but are repeated here
for convenience.
NOTICE
• Disconnect power and all connections to LYNK II before attempting to configure
header jumpers.
NOTE
• LYNK II terminates the AEbus and LYNK Network by default. Do not remove the
termination jumper inside LYNK II unless instructed to do so by Discover Battery.

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4.2 LYNK II CAN Out - RJ45 Pin Assignments for Sunny Island Inverters
CAN signals (CAN H, CAN L, CAN GND) can be assigned to any pin of the RJ45
connector by adjusting the jumpers on the header board.
4.2.1 Sunny Island Pin Assignments
CAN Out Header Jumper RJ45 Pin
CAN L H2 - 5-7 5
CAN H H3 - 8-10 4
CAN GND H4 - 2-4 2
8
7
6
5
4
3
2
1
JUMPER
CAN GND
CAN L
CAN H
H1
H2
H3
H4
7
8
7
8
7
8
3
4
4
3
4
3
4
1
2
2
1
2
1
2
5
6
5
6
5
6
5
9
10
9
10
9
10
LOW
HIGH
GROUND
9
10
7
86
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Figure 2. SMA Pin Assignment
4.3 Off-grid System Components
SMA Sunny Island systems are often AC coupled with Sunny Boy PV inverters for
off-grid applications.

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NOTE
• In an Off-Grid operation where Sunny Island is a grid-forming device (not
synchronized to the grid or generator), the charging setpoint received from
the external BMS is automatically reduced by 1 V. This is a protective measure
implemented in Sunny Island to prevent unintended overcharging under high
dynamic conditions (sudden changes in PV and load).
NOTE
• SMA brand Sunny Charge Controllers are not approved for lithium batteries and
therefore must not be used with Discover Lithium batteries.
4.4 Battery Protection – Off-grid
The Sunny Island system’s operation and battery protection depend on the battery’s
state of charge (SOC). In off-grid operation, the Battery Protection mode prevents
the battery from a deep discharge due to low energy supply, preventing total
system failure and damage to the battery. If the battery’s SOC falls below threshold
settings (Setting: #223) (Web: Battery > Protection mode), the Battery Protection
mode is activated, and the Sunny Island switches to either standby mode or off. The
Discover Battery BMS reports SOC to Sunny Island through LYNK II Gateway but
does not override the threshold settings. Refer to the relevant Sunny Island Manual
for how to use and set up Battery Protection.
4.5 Battery Protection - Self-Consumption
The options for increased self-consumption depend on the battery SOC and the
availability of PV energy.To use the battery optimally, adjust the depth of discharge
of the battery based on location and season (Setting: #262) (Web: Battery > Areas of
application > Season operation active). The Discover Battery BMS reports SOC to
Sunny Island through LYNK II Gateway but does not override the threshold settings.
Refer to the relevant Sunny Island Manual for how to use and set up threshold
settings. Self-consumption adjustments are not available on the 4548-US and 6048-
US models.
NOTE
• Self-consumption Battery Protection adjustments are unavailable on Sunny Island
4548-US and 6048-US models.

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5. INSTALLING AND CONNECTING LYNK II TO THE SMA NETWORK
5.1 Networking Discover Lithium Batteries with LYNK II Gateway
NOTICE
• Turn OFF all devices before connecting cables.
• Do not plug an AEbus or LYNK RJ45 network cable or terminator into the 10/100
Ethernet port of the LYNK II.
• Do not connect a CAT5 cable from the AEbus, LYNK, or Ethernet ports of the LYNK II
to a WAN or MODEM port of a network router.
• Mixing the LYNK Network with other networks may result in equipment malfunction
and damage.
NOTICE
• Unless specified by Discover Battery, do not connect power electronics directly to the
LYNK network or AEbus network.
Refer to the LYNK II Installation and Operation Manual (805-0033) for instructions
on network layouts, connections, and termination of compatible Discover Lithium
battery models. Some key points are repeated here for convenience.
• Connect at least one battery to the LYNK Port on the LYNK II Communication
Gateway.
• A network of batteries will communicate as one battery.
• Connect no more than one network of batteries to the LYNK II.
• Proper system function requires network termination – some batteries and
devices may auto-terminate.
• LYNK II requires power from one of three available sources (13-90 VDC power
supply, a USB device, or AEbus Port or LYNK Port enabled Discover Lithium
battery).
• Discover Lithium batteries must be set to ON to supply power and communicate
with LYNK II.
LYNK II is internally terminated. AES batteries are not internally terminated. When
using LYNK II with an AEbus network, install a terminator at the end opposite LYNK
II.
Figure 3. AES

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NOTE
• AES LiFePO448 V batteries sold before Jan 1, 2020, will not supply power to LYNK II
using the network cable connection. An external 13-90 VDC power source connected
to the Phoenix 12-pin connector on LYNK II is REQUIRED for the AES LiFePO4
batteries listed below.
• 42-48-6650 with a serial number before DET424820275xxxx
Figure 4. Helios
LYNK II and HELIOS ESS batteries are both internally terminated. When installing
LYNK II with Helios batteries, no external termination is required.
6. ENABLING LYNK II TO COMMUNICATE WITH SMA SUNNY ISLAND
DEVICES
When properly connected to a closed-loop network and set to use the CANbus
protocol, LYNK II will transmit real-time parameters from the Discover Lithium
battery, including voltage, current, temperature, state of charge, and fault conditions
to the SMA network. LYNK II will also transmit charge voltage and current requests
from the Discover Lithium battery to devices on the SMA network.
LYNK ACCESS software for 64-bit Windows 10 is required to configure LYNK II
settings for closed-loop communication with devices on a CANbus network.
6.1 Connecting LYNK II to the SMA Network
Connect the LYNK II Gateway CAN out port to the ‘ComSync In’ port on the Sunny
Island inverter-charger using a CAT5 cable.Terminate the ComSync communication
bus at both ends.The LYNK II Communication Gateway is internally terminated.
Sunny Island ComSync In Port RJ45 Pin configuration:
1. Sync1 - reserved
2. CAN_GND
3. SYNC_H
4. CAN_H
5. CAN_L
6. SYNC_L

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7. Sync7 - reserved
8. Sync8 - reserved
4548-US 6048-US 4.4M 6.0H 8.0H
Figure 5. Sunny Island RJ45 Pin Configuration
6.2 LYNK II and Sunny Island Network Terminations
The LYNK II Gateway unit is internally terminated. Using the SMA termination
plug supplied with the Sunny Island, terminate the Sunny Island ComSync
communication network at both ends. For a single Sunny Island, the end of the
communication bus is the ComSync Out port on the Sunny Island. For a Sunny
Island cluster, the end of the communication bus is the ComSync Out port on the
last Sunny Island in the cluster.
ComSync network termination:
• 100 Ohm resistor between CAN_H and CAN_L and a 100 Ohm resistor between
SYNC_H and SYNC_L.
6.3 Sunny Island Battery Temperature Sensor
For Discover Lithium batteries, as the internal BMS transfers the battery
temperature to Sunny Island, do not use an external battery temperature sensor.
6.4 Setting the LYNK II Communication Protocol to CANbus
The Protocol Configuration Procedure
1. Download the current version of LYNK ACCESS software from the Discover
Battery website to obtain the most up-to-date suite of available protocol
configurations.
2. Using a USB cable with aType-B mini-plug, connect the 64-bit Windows 10
device running LYNK ACCESS software to the USB port on LYNK II. Ensure LYNK
II is powered and connected to the correct end of the CANbus network.
3. Ensure that only one LYNK device is connected to the computer.

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4. Connect the LYNK II Communication Gateway, open the LYNK ACCESS software,
and click the LYNK tab.
5. Select the blue gear icon in the upper right area of the CAN Settings tile.
6. Select the pre-configured SMA protocol to complete the closed-loop
configuration for LYNK II. Click SAVE to confirm the configuration.
NOTE
• Saving configuration changes using LYNK ACCESS will automatically cause the LYNK
II Communication Gateway to shut down and restart.
7. CONFIGURING SUNNY ISLAND
7.1 Setting Up Sunny Island 4548-US and 6048-US
Before connecting LYNK II to the Sunny Island network, update the firmware on
Sunny Island 4548-US and 6048-US to version 7.3 or later.
The following instructions are for a system with a single Sunny Island in an off-grid
application. Refer to the Sunny Island Manual to install a system with multiple
Sunny Island inverters.
After installing the batteries described in the Discover Battery manual, follow the
SMA Quick Configuration Guide (QCG) instructions to set up the Sunny Island for
use with Discover Lithium batteries.
1. Switch the DC circuit breaker of the Sunny Island from OFF to ON.
OFFOFF
DC-Disconnect
To init system
hold <Enter>
STNDBY: to Start
INV hold <ENTER>
2. Sunny Island will initiate the startup phase and displays several notifications. ‘To
init system’ is the last notification.
3. Press and hold down <ENTER> until the Sunny Island beeps three times to start
the QCG setup.
4. Set the parameters for Discover Lithium batteries.
When replacing batteries with Discover Lithium batteries in an existing SI
system, select ‘New Battery.’
When commissioning a ‘New System,’ wait until prompted to enter battery
parameters.

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• BatteryType: LiIon_Ext-BMS
• Nominal capacity of the battery: Installed number of batteries x their nominal
capacity in Ah
After entering all parameters, the ‘INIT MASTER OK START?’ notification will
appear.
5. Press <ENTER> to confirm, and the following notification appears.
6. Press <ENTER> and hold until you hear an acoustic signal.
The operation of Sunny Island now begins.
NOTE
• Nominal voltage for the battery is automatically set to 48 V.
• Only mandatory settings for basic operation of the Sunny Island system are available
for set up in the QCG.
7.2 Setting Up Sunny Island 4.4M, 6.0H, and 8.0H with Legacy Sunny Remote
Control
Geared to readers familiar with SMA Sunny Island operations, the following
instructions are for a system with a single Sunny Island in an off-grid application.
Refer to the Sunny Island Manual to install a system with multiple Sunny Island
inverters.
After installing the batteries described in the Discover Battery manual, follow the
SMA Quick Configuration Guide (QCG) instructions to set up the Sunny Island for
use with Discover Lithium batteries.
The Quick Configuration Guide (QCG) starts up during the initial startup of Sunny
Island. On the Sunny Remote Control – SRC-20 display, a menu structure guides the
user for the commissioning of the system.
Figure 6. Sunny Island with
Sunny Remote Control
1. Press the activation button on Sunny Island.
2. When the Sunny Island Remote Control displays ‘Init System,’ press and hold the
button on the Sunny Remote Control until an acoustic signal sounds three times,
and the Sunny Remote Control displays the QCG.

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Boot
<Init System>
xxx. xx
xx. xx. xxxx xx:xx:xx
Figure 7. Sunny Island Remote Control - Init System
3. When replacing batteries in an existing system with Discover Lithium batteries,
turn clockwise the button on the Sunny Remote Control and select ‘New Battery.’
Press the button to confirm your selection of ‘New Battery.’
When commissioning a ‘New System,’ wait until prompted to enter battery
parameters.
Set the following parameters for Discover Lithium batteries:
• BatteryType: LiIon_Ext-BMS
• Nominal capacity of the battery: Installed number of batteries x their nominal
capacity in Ah
4. Confirm the settings to complete the process.
NOTE
• Nominal voltage for the battery is automatically set to 48 V.
• Only mandatory values for the basic operation of the Sunny Island system are
available for set up in the QCG.
7.3 Setting Up Sunny Island 4.4M, 6.0H, and 8.0H from the Integrated Web
Interface
Geared to readers familiar with SMA Sunny Island -12 generation or later
operations, the following instructions are for a system with a single Sunny Island
in an off-grid application. Refer to the Sunny Island Manual to install a system with
multiple Sunny Island inverters.
Follow the commissioning instructions in the Sunny Island 4.4M / 6.0H / 8.0H
Operating Manual, which use a web-based interface.
1. After installing the batteries described in the Discover Lithium battery manual,
establish a direct connection (WLAN or Ethernet) to Sunny Island and log into
the user interface as an installer.
2. When replacing batteries in an existing system with Discover Lithium batteries,
go to the Battery Configuration tab.
When commissioning a system for the first time, the installation assistant guides
you through the process.

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3. Set the following parameters for Discover Lithium batteries:
• BatteryType: Lithium-ion (Li-Ion)
• Nominal capacity of the battery: Installed number of batteries x their nominal
capacity in Ah
8765432
SUNNY ISLAND 6.0H
Home
1
Battery configuration
Type Minimum capacity
Lithium-ion (Li-ion) 1000 Ah
Back Send Next
User Information
Battery Configuration
Figure 8. Battery Configuration in WebConnect
NOTE
• Nominal voltage for the battery is automatically set to 48 V.
• Only mandatory values for the basic operation of the Sunny Island system are
available for set up in the QCG.
7.4 LYNK II and Sunny Island Communication
The LYNK II Communication Gateway provides power conversion and monitoring
devices with BMS real-time data in a closed-loop configuration to optimize control
over the charging process in solar applications. LYNK II also enables the remote
monitoring of Discover Lithium battery SOC and data logging of multiple sites using
the data monitoring services offered by off-grid inverter systems.
If communication is interrupted between the LYNK II and power conversion device,
after about 1 minute the power conversion device throws a fault (952).
Once communication is re-established, the operations of the power conversion
device and the LYNK II communication gateway resume.

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NOTES