DISCOVER LYNK II User manual

1805-0040 REV A
(950-0025)
805-0040 LYNK II VICTRON
(SOLAR) MANUAL

2
1.0 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
2.0 Documentation 5
3.0 Overview 6
3.1 System Overview 6
3.2 Compatibility 7
3.3 Minimum Battery System Capacity 8
4.0 CAN HardwareTermination and CAN Out PIN Configurations 9
4.1 LYNK II CANTermination 9
4.2 LYNK II CAN Out - RJ45 PIN Assignments for Victron Devices using VE.can 9
4.2.1 VE.CAN PIN Assignments 10
5.0 Installing and Connecting LYNK II to the VE.Can Network 11
5.1 Networking Discover Lithium Batteries with LYNK II 11
5.2 Connecting LYNK II to the VE.Can Network 12
6.0 Enabling LYNK II to Communicate with Victron Devices 13
6.1 Victron Open-Loop Configuration 14
6.1.1 Victron Open-loop Inverter-Charger Configuration Procedure 14
6.1.2 Victron Open-loop MPPT Charge Controller Configuration Procedure 16
6.2 Setting the LYNK II Communication Protocol for Victron Energy Devices 17
6.2.1 Victron Protocol Configuration Procedure 17
6.3 Victron Closed-Loop Configuration 18
6.3.1 Victron Closed-loop Configuration Procedure 18
6.4 Configurable Closed-Loop Settings 19
6.4.1 Saving the Configurable Closed-Loop Settings 21

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Introduction
This Application Note provides information about integrating LYNK and AEbus
network-enabled Discover Lithium Batteries using the LYNK II Communication Gateway
with Victron inverter-chargers.
1.0 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 not related to
personal injury or equipment damage.

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1.3 General Warnings
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 HAZARD
• 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.
• Only use the battery for the system for which it is specified.
• 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.

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• 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.
2.0 Documentation
This Application Note provides information about integrating LYNK and AEbus
network-enabled Discover Lithium Batteries using the LYNK II Communication Gateway
with Victron inverter-chargers.
Before installation and configuration, consult the relevant product documentation,
including Manuals, Application Notes, and Installation and Configuration Guides.
Victron Energy Documentation
Visit https://www.victronenergy.com/ 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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3.0 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.
The key steps required to install and configure the LYNK II Communication Gateway
with compatible Discover Lithium batteries and power conversion equipment are as
follows:
• Review and confirm equipment compatibility and correct sizing.
• Configure the LYNK II CAN out PINs to match the CAN in PINs of the power
conversion equipment.
• Mount the LYNK II, 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 up the open-loop configuration parameters on the power conversion
equipment.
• Set the LYNK II using LYNK ACCESS software to the correct protocol to enable
closed-loop communication between the Discover batteries and the power
conversion equipment.
• Set up the closed-loop configuration parameters on 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 power conversion and
monitoring devices in either an open-loop or closed-loop configuration.
In an open-loop configuration, charge and discharge settings are set up manually
through the controller for the power conversion device at the time of installation.

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In a closed-loop configuration, the BMS of the Discover Lithium battery sends battery
status over a network data connection with the power conversion device. Power
conversion devices use the Discover Lithium battery BMS data to fine-tune the
output of their charger and deliver other functional controls based on battery voltage,
temperature, and percent State-of-Charge.
If communication is interrupted between the BMS and Victron inverter-charger, the
Victron inverter-charger uses the charge and discharge settings specified for an open-
loop configuration.
NETWORK
TERMINATOR
NETWORK
TERMINATOR
VE.CAN
VE.DIRECT
VE.BUS
Figure 1. Example LYNK II with Victron Energy devices
3.2 Compatibility
LYNK II Communication Gateway is compatible with the following:
Discover Lithium Batteries
• AES LiFePO4: 44-48-3000, 42-48-6650
• HELIOS ESS: 46-24-1560, 46-48-1540
Victron Products
Control Panels:
• Cerbo GX
• Color Control GX
• Venus GX
Used in conjunction with:
• Quattro Inverter-Charger
• Multiplus Inverter-Charger
• SmartSolar MPPT

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3.3 Minimum Battery System Capacity
Battery charge and discharge rates are managed automatically by the Discover
Lithium Battery and Victron Energy 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. Either curtail the
charging below the operational limit of installed batteries, or the battery capacity must
accept the maximum charge current of the system. Derive 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.
Inverter Peak Amps DC = (Inverter Surge W) / (Inverter Efficiency) / (48V: Low Battery Cut-Off)
Discharge Continuous Amps DC = (Inverter Continuous W) / (Inverter Efficiency) / (48V: Low Battery
Cut-Off)
120V Models
Inverter
Peak
Amps
DC
Discharge
Continuous
Max Amps
DC
Charger
Continuous
Max Amps
DC
44-48-3000
Minimum
per
inverter
42-48-6650
Minimum
per
inverter
46-48-1560
Minimum
per
inverter
Quattro
48/3000/35
(1)
133 54 35 1 1 2
Quattro
48/5000/70
(2)
220 88 70 1 1 2
Quattro
48/10000/140
(3)
434 174 140 3 2 5
1Calculated based on max 6000W at 120 VAC peak output, 2400W at 120VAC continuous output,
efficiency 94.0 %, and 35A DC max charging, as published in Victron Data Sheet as of 22-09-01.
2Calculated based on max 10000W at 120 VAC peak output, 4000W at 120VAC continuous output,
efficiency 95.0 %, and 70A DC max charging, as published in Victron Data Sheet as of 22-09-01.
3Calculated based on max 20000W at 120 VAC peak output, 8000W at 120VAC continuous output,
efficiency 96.0 %, and 140A DC max charging, as published in Victron Data Sheet as of 22-09-01.

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Inverter Peak Amps DC = (Inverter Surge W) / (Inverter Efficiency) / (24V: Low Battery Cut-Off)
Discharge Continuous Amps DC = (Inverter Continuous W) / (Inverter Efficiency) / (24V: Low Battery
Cut-Off)
120V Models
Inverter
Peak
Amps DC
Discharge
Continuous
Max Amps DC
Charger
Continuous
Max Amps DC
46-24-1560
Minimum per
inverter
MultiPlus 24/2000/50 (4) 178 71 50 1
MultiPlus 24/3000/70 (5) 244 107 70 2
Quattro 24/5000/120 (6) 444 178 120 2
4Calculated based on max 4000W at 120 VAC peak output,1600W at 120VAC continuous output,
efficiency 94.0 %, and 50A DC max charging, as published in Victron Data Sheet as of 22-09-01.
5Calculated based on max 5500W at 120 VAC peak output, 2400W at 120VAC continuous output,
efficiency 94.0 %, and 70A DC max charging, as published in Victron Data Sheet as of 22-09-01.
6Calculated based on max 10000W at 120 VAC peak output, 4000W at 120VAC continuous output,
efficiency 94.0 %, and 120A DC max charging, as published in Victron Data Sheet as of 22-09-01.
4.0 CAN Hardware Termination and CAN Out PIN Configurations
4.1 LYNK II CAN Termination
NOTICE
Disconnect power and all connections to the LYNK II Communication Gateway
before configuring header boards and jumpers.
Jumpers configure termination for the AEbus and LYNK Network and the CAN Out PIN
assignments. Follow the LYNK II Installation and Operation Manual (805-0033) to access
and configure the header board with jumpers.
Detailed PIN configurations are included in the LYNK II manual and are repeated here
for convenience.
NOTE
The LYNK II Communication Gateway terminates the AEbus and LYNK Network by
default. Do not remove the termination jumper inside the LYNK II Communication
Gateway unless instructed by Discover Battery.
4.2 LYNK II CAN Out - RJ45 PIN Assignments for Victron Devices using
VE.can
Assign CAN signals (CAN H, CAN L, CAN GND) to pins of the RJ45 connector by
adjusting the jumpers on the header board.

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4.2.1 VE.CAN PIN Assignments
CAN Out RJ45 PIN Header Jumper RJ45 PIN
CAN L H1 - 6-8 8
CAN H H1 - 7-9 7
CAN GND H3 - 1-3 3
8
7
6
5
4
3
2
1
JUMPER
CAN GND
CAN H
CAN L
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
9
10
7
86
31
LOW
HIGH
GROUND
Figure 2. LYNK II PIN assignments for communication with Victron Energy devices

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5.0 Installing and Connecting LYNK II to the VE.Can Network
5.1 Networking Discover Lithium Batteries with LYNK II
NOTICE
• Turn OFF all devices before connecting cables.
• Do not plug an AEbus 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 terminators 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.
• A network of batteries will communicate as one battery.
• May 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 possible 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.
Figure 3. AES Battery

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LYNK II is internally terminated. AES batteries are not internally terminated. When using
LYNK II on an AEbus network, install a terminator opposite the LYNK II at the far end of
the battery network.
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 LiFePO4batteries listed below.
◦42-48-6650 with a serial number before DET424820275xxxx
Figure 4. Helios Battery
LYNK II and HELIOS ESS batteries are both internally terminated. When installing LYNK
II with Helios batteries, no external termination is required.
5.2 Connecting LYNK II to the VE.Can Network
Before connecting LYNK II to the VE.Can network ensure that the Victron GX device
uses firmware version 2.89 or later. Also, ensure the CAN out pins on the LYNK II
are configured correctly. Refer to 4.0, CAN HardwareTermination and CAN Out PIN
Configurations.
Insert one end of a CAT5 communication cable into the LYNK II CAN out port and the
other end into one of the two VE.Can ports (A-B) on the back of the Victron device. As
the LYNK II is internally terminated, the external terminator provided with the GX is not
required.
NOTE
• Ensure that the Victron GX device is using firmware version 2.89 or later.

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POWER in V+
8-70VDC GND
USB Device
VE.Direct 1
VE.Direct 2
VE.Can
EthernetUSB Host
VE.Bus
Relay
1
2
Figure 5. Victron GX device
1. VE.Bus: CAT5 socket for connecting to the Victron inverter.
2. VE.Can: CAT5 socket for connection to LYNK II CAN Out.
◦Insert a terminator in the other VE.Can port to terminate the CAN network.
6.0 Enabling LYNK II to Communicate with Victron Devices
When the LYNK II is in a closed-loop network using the CANopen protocol, LYNK II will
transmit real-time parameters from the Discover Lithium battery, including voltage,
current, temperature, state of charge, and fault conditions to a Victron Energy device.
LYNK II also transmits charge voltage and current requests from the Discover Lithium
battery to the Victron device.
The Victron inverter-charger defaults to open-loop (voltage-based) settings when there
is a break in communication with LYNK II.Therefore, as a precautionary measure, it is
recommended to program the Victron inverter-charger with the correct voltage-based
parameters before setting up the system to operate in a closed-loop configuration.
LYNK ACCESS software for 64-bit Windows 10 is required to configure LYNK II settings
for closed-loop CAN communication with Victron Energy devices.

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6.1 Victron Open-Loop Configuration
You will need the latest firmware on all connected devices.The following presumes
familiarity with VE Configure software. After setting the voltage-based open-loop
parameters using the VE Configure 3 software, ‘send’ all parameters to the inverter-
charger and GX device and then restart the GX device.
Quattro
UMains - - - V
- - - A
IMains
UOut - - - V
- - - A
IOut
UOut - - - V
- - - V
Udc ripple
Freq. Out - - - Hz
- - - Hz
- - -
- - -
Freq. In
SoC
Ignore AC
aux. relay
- - - A
Idc
Get Settings
Send Settings
General
System Frequency
50Hz
Grid Inverter Charger Virtual Switch Assistants
Shore Limit
AC1 input current limit Overruled by remote60.0 A
(priority)
60Hz
Dynamic current limiter
External current sensor connected (see manual)
State of charge when Bulk finished
Enable battery monitor
AC2 input current limit Overruled by remote30.0 A
95.0 %
Battery capacity 130 Ah
Charge efficiency 1.0
Figure 6. VE Configure 3 Software
6.1.1 Victron Open-loop Inverter-Charger Configuration Procedure
Refer to the latest Discover Battery documentation for battery values and the latest
Victron documentation for details on menu navigation and the setup procedure.
1. Set the Discover Lithium batteries to ON and set the inverter to ON.
2. Connect your computer to the Victron GX device or inverter-charger.
3. On the computer, start the VE Configure 3 software configuration tool.
4. Enable and disable parameter values according to the tables below.
5. Send the parameters to the Victron inverter-charger and GX device.
6. Restart the inverter-charger or GX device.

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VE Configure 3 > General Tab
GeneralTab 44-48-3000 42-48-6650 46-24-1540 46-48-1540
[AC1] Overruled by remote (1) Enable Enable Enable Enable
[AC2] Overruled by remote (1) Enable Enable Enable Enable
Dynamic Current Limiter Enable Enable Enable Enable
External Current Sensor
Connected Disable Disable Disable Disable
Enable battery monitor Enable Enable Enable Enable
SOC when Bulk finished (2) 95% 95% 95% 95%
Total battery capacity (per
battery installed)
Installed x
57 Ah
Installed x
130 Ah
Installed x
60 Ah
Installed x
30 Ah
Charge efficiency (2) 1.0 0 1.0 0 1.0 0 1.0 0
VE Configure 3 > InverterTab
InverterTab 44-48-3000 42-48-6650 46-24-1540 46-48-1540
DC input low shutdown (3) 48.0 V 48.0 V 24.0 V 48.0 V
DC input low restart (4) 52.8 V 52.8 V 26.8 V 52.8 V
DC input low pre-alarm (5) 49.5 V 49.5 V 24.75 V 49.5 V
Enable AES (6) Disable Disable Disable Disable
VE Configure 3 > ChargerTab
Charger Tab 44-48-3000 42-48-6650 46-24-1540 46-48-1540
Enable charger Enable Enable Enable Enable
BatteryType (2) Blank Blank Blank Blank
Lithium batteries (2) Enable Enable Enable Enable
Charge curve (2) Select: Fixed Select: Fixed Select: Fixed Select: Fixed
Absorption Voltage (2) 55.2 V 55.2 V 27.6 V 55.2 V
Float Voltage (2) 53.6 V 53.6 V 26.8 V 53.6 V
Charge Current Installed x
57A
Installed x
130 A
Installed x
60 A
Installed x
30 A
Repeated absorption
time (2) (7) 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr
Repeated absorption
interval (2) 7.0 Days 7.0 Days 7.0 Days 7.0 Days
Absorption time (2) (7) 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr
(1) Enabled is recommended.
(2) Precautionary settings ignored during normal operation and communication with Discover
Lithium Battery.
(3) The lowest operating voltage allowed. Increase voltage as required.

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(4) Restart voltage after DC input low shutdown. Recommend setting to the minimum value (mini-
mum varies according to the DC Input low shutdown value).
(5) 49.5 V / 24.75 V value (approximately 10% SoC) will trigger a low battery warning. Increase or
decrease as preferred.
(6) ‘Enable AES’ has no relation to the AES Battery. Refer to Victron manuals for information on the
AES setting and function.
(7) The recommended minimum is 1.0 hour. Multiple batteries may require a longer time to achieve
a smooth completion of charge.
NOTE
• Confirm the Float Voltage after installation of any Victron ’Assistants’, and if
necessary, set the Float Voltage back to 26.8 V / 53.6 V.
6.1.2 Victron Open-loop MPPT Charge Controller Configuration Procedure
During normal operation, the MPPT
charge characteristics are governed
by the Victron GX device in a closed-
loop configuration based on data
and charge requests provided by the
connected Discover Lithium battery.
The Victron MPPT defaults to open-
loop (voltage-based) settings when
there is a break in communication with
LYNK II.Therefore, as a precautionary
measure, it is recommended to
program the Victron MPPT with the
correct voltage-based parameters
(below) before setting up the system to
function in a closed-loop configuration.
The Victron Connect Bluetooth App
is used to configure, monitor, and
diagnose Victron MPPT Charge
Controller products equipped with
Bluetooth.
Battery Voltage
Max charge current
Charger enabled
48V
60A
55.20V
Settings
10:25
User defined
Battery preset
Expert mode
Charge voltages
Equalization
Automatic equalization
Manual equalization
Absorption voltage
53.60V
Float Voltage
55.20V
Disabled
Temperature compensation Disabled
Low temperature cut-off 5°C
START NOW
Equalization voltage
Voltage compensation
Battery Limits
Figure 7. Victron Connect
(Bluetooth App)

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Victron Connect Bluetooth App > Device List > Victron MPPT > Settings > Battery
MPPT Battery Settings
Menu 44-48-3000 42-48-6650 46-24-1540 46-48-1540
Battery Voltage 48 V 48 V 24 V 48 V
Max Charge Current (1) Installed x
57 A
Installed x
130 A
Installed x
60 A
Installed x
30 A
Charger Enabled Enabled Enabled Enabled Enabled
Battery Preset User Defined User Defined User Defined User Defined
Absorption Voltage 55.2 V 55.2 V 27.6 V 55.2 V
Maximum Absorption
Time (2) 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr 1.0 < 3.0 Hr
Float Voltage 53.6 V 53.6 V 26.8 V 53.6 V
Equalization Voltage 55.2 V 55.2 V 27.6 V 55.2 V
Auto Equalization Disabled Disabled Disabled Disabled
Temperature
Compensation Disabled Disabled Disabled Disabled
LowTemperature Cut off < 0°C (32°F) < 0°C (32°F) < 0°C (32°F) < 0°C (32°F)
(1) May be set to a lower value if necessitated by charger controller size.
(2) Duration of absorption period after the bulk charge interval.The recommended minimum is 1.0
hour. Multiple batteries may require a longer time to achieve a smooth completion of charge.
6.2 Setting the LYNK II Communication Protocol for Victron Energy
Devices
6.2.1 Victron Protocol Configuration Procedure
1. Download the current version of LYNK ACCESS software from the Discover
Battery website to get 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 Victron
COM port (VE.Can).

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3. Connect the LYNK II. In LYNK ACCESS, confirm that only one LYNK device is
connected to the computer.
4. In LYNK ACCESS, select the LYNK tab for optional configuration and settings.
Select the blue gear icon in the upper right area of the CAN Settings tile.
5. Select the pre-configured Victron protocol to complete the closed-loop
configuration for LYNK II, and click SAVE.
NOTE
• Saving configuration changes in LYNK ACCESS automatically forces the LYNK II
to restart.
6.3 Victron Closed-Loop Configuration
6.3.1 Victron Closed-loop Configuration Procedure
Refer to the latest Discover Battery documentation for battery values and the latest
Victron documentation for menu navigation and details on the setup procedure.
1. Set the Discover Lithium batteries to ON and the Victron GX device to ON.
2. Using a touch screen or other user interface of the GX device, set the VE.Can
port and CAN-Bus BMS communication rate to 250 kbit/s.
Device List > Settings > Services >VE.Can port > CAN-bus profile
• Select VE.Can & CAN-bus BMS (250 kbit/s)
CAN-bus profile 15:48
Disabled
VE. Can & Lynx Ion BMS (250 kbit/s)
VE. Can & CAN-bus BMS (250 kbit/s)
CAN-bus BMS (500 kbit/s)
Oceanvolt (250 kbit/s)
Figure 8. CAN-bus Profile
3. Return to the Device List, and the Discover Lithium Battery should now appear
as one of the devices.

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Device List >
MenuPages
Device List 15:48
Discover AES
Quattro 48/5000/70-2x100 120V
SmartSolar Charger MPPT 250/60
Notifications
Settings
98% -0.8A53.12V
Inverting
0W
MenuPages
Figure 9. Device List
NOTE
• If Discover does not appear on the Device List, confirm that the CAT5
communication cable is a normal patch type, not a cross-over type. Use
manufactured cables to avoid bad crimps and reduce the risk of a poor
connection.
4. To confirm that all batteries in the network are communicating with the
Victron system, review the actual battery parameters. If multiple batteries are
connected, a single entry shows the total limits of all the batteries.
Device List > Discover [Battery] > Parameters
MenuPages
Parameters 15:48
Charge Voltage Limit (CVL)
Charge Current Limit (CCL)
Discharge Current Limit (DCL)
55.9V
60.0A
60.0A
MenuPages
Figure 10. Battery Parameters
6.4 Configurable Closed-Loop Settings
During normal operation, the battery’s charge parameter limits are set by the BMS and
communicated by the Victron GX device to the inverter-charger and MPPT.
To optimize the performance of a Victron system, manually set the following DVCC
menu items using the Victron GX device and reboot the system.

20
Device List > Settings > DVCC
MenuPages
DVCC 15:48
CAUTION: Read the manual before adjusting
DVCC
Limit charge current
Maximum charge current
Limit managed battery charge voltage
SVS - Shared voltage sens
MenuPages
Forced on
30A
Forced off
Figure 11. DVCC Menus 1/2
MenuPages
DVCC 15:48
Maximum charge current
Limit managed battery charge voltage
SVS - Shared voltage sense
STS - Shared temperature sense
SCS - Shared current sense
SCS status
MenuPages
30A
Disabled (External control)
Forced off
Forced off
Figure 12. DVCC Menus 1/2
DVCC Menu Setting
DVCC (Distributed Voltage and
Current Control) Forced on
Limit charge current ON (1)
Maximum charge current
Installed number of Discover Lithium batteries
x their rated Maximum Charger current, or a
lower value if system curtailment is required.
Limit Managed Battery Charge
Voltage Disable
SVS - Shared voltage sense Forced off (2)
STS - Shared temperature sense Forced off
SCS - Shared current sense ON
SCS status (Displays the current status)
(1) Limit charge current works across the whole system. MPPTs are automatically prioritized over the
mains. In cases where the BMS requests a maximum charge current different from the user-con-
figurable setting, it uses the lesser of the two.
(2) SVS should be set to OFF (Victron support has reported instances of conflicts when SVS is set to
ON with a Lithium BMS).