Cerbo GX Manual

Device list

Various

Various

Contains a list of all devices connected to the GX device. Most entries include submenus with additional information and configuration options for the respective devices.

General

Access level

User and User & Installer

Set this to 'User' to prevent accidental and unwanted changes to the configuration. User & Installer has additional privileges and once changed from default requires a password. Password is available from your dealer.

Network security profile

Secured

Secured = Password protection and network communication encryption

Weak = Password protection but no network communication encryption

Unsecured = No password protection and no network communication encryption

Remote support

Disabled

Enable this to allow Victron engineers to access your system in case there is a problem.

Remote support tunnel

Offline

Displays 'Online' when 'Remote support' is enabled.

Remote support IP and port

[IP;port]

Displays the remote support IP address and port.

Reboot

Reboot Now

Reboots the GX device

Audible alarm

Enabled

When an alarm occurs on the GX device or a connected product, the device will emit a beep, unless this setting is set to disabled.

Demo mode

Disabled

Activates a simulation mode to demonstrate product and system features for clients or exhibitions. It allows users to explore the interface without altering real settings.

Note: Enabling demo mode adds simulated devices to the VRM installation. Available demos include ESS, Boat, and Motorhome.

Enable status LEDs

Enabled

Use this option to disable the status LEDs.

Firmware - Read full feature description

Firmware Version

x.xx

Displays the currently installed firmware version.

Build date/time

xxx

Displays the build number.

Online updates: Auto update

Check only

If this is Enabled, the GX device will check with the server to see if there is a new version available. It is possible to set to disable, or update automatically

Online updates: Update feed

Official release

Use the default setting unless you want to participate in test versions. End-user systems should certainly be set to 'Official release'.

Online updates: Image type

Normal

Choice between Normal and Large image. The large image adds Node-RED and the Signal K-Server functionality to the image.

Online updates: Check for updates

Press to check

Press to check if a new firmware update is available.

Install firmware from SD/USB

Use this menu to install a new version from a microSD card or USB stick. Insert the card or stick that holds the new firmware .swu file.

Stored backup firmware

With this feature you can go back to the previously installed firmware version.

Date & Time

Date/Time UTC

Automatic from internet

-

Time zone

-

Select your local time zone from the list.

System setup

System name

Automatic

Select the system name - presets or user defined

AC input 1

Generator

Select Not available, Generator, Grid or Shore power. Note: additional configuration is required for complete setup of these options.

AC input 2

Grid

Same choices as above.

Position of AC loads

AC output only

Options:

Monitor for grid failure

Disabled

Monitors for loss of AC-input and triggers an alarm if detected. Alarm is cleared when the AC-input is reconnected.

Battery monitor

Automatic

Select the SoC source. This function is useful where there is more than one source of battery. Options: Automatic, No battery monitor and available battery monitor sources. For more details see Battery state of charge (SoC).

Auto-selected

Displays the automatically selected SoC source when the ‘Battery monitor’ is set to ‘Automatic’.

Has DC system

Disabled

Enable this for boats, vehicles and installations with DC loads and chargers - in addition to Multi and MPPT chargers. This won't be applicable to most off-grid installations; and any discrepancy between the DC current measured by the Multi, and by the BMV, will be attributed to a 'DC system'. This may be power-in from an alternator, or power-out from a pump, for example.

A positive value indicates consumption. A negative value indicates charging, for example by an alternator.

Note that the value shown will always be an approximation, and is affected by the variation in sample rate between elements of the system. To replace the approximated values with accurate measurements, a SmartShunt can be used, which needs to be configured to Monitor mode “DC Energy Meter” and DC meter type “DC System”.

Battery Measurements

Not set

Use this menu to define the battery data shown when clicking the Battery icon on the Overview page. The same selection is also visible on the VRM Portal.

DVCC - Read full feature description

DVCC

Disabled

Enabling DVCC turns the GX device from a passive monitor into an active controller. By default, it is disabled unless a compatible BMS-Can managed battery is connected, in which case it is set and locked according to the manufacturer’s specifications.

Limit charge current

Disabled

Sets a user-defined maximum charge current for the entire system, specified in Amps. This allows coordinated charge control across all supported devices.

Limit managed battery charge voltage

Disabled

This option is intended only for initial balancing of 15s Pylontech batteries. Do not use it for other purposes, as it may lead to undesirable side effects.

SVS - Shared voltage sense

Disabled

When enabled, the GX device automatically selects the best available voltage measurement and shares it with other connected devices.

STS - Shared temperature sense

Disabled

When enabled, the GX device transmits the measured battery temperature to the inverter/charger system and all connected solar chargers.

Temperature sensor

Automatic

Select which temperature sensor is used for Shared Temperature Sense. In automatic mode, the GX device chooses the most suitable available sensor.

SCS - Shared current sense

No

When enabled, the GX device forwards the battery current measured by a connected battery monitor to all supported solar chargers for coordinated charging behaviour.

SCS status

Displays if SCS is enabled, or why it is disabled.

Controlling BMS

Automatic

Selects which Battery Management System (BMS) is used to control the battery, or disable BMS control. In automatic mode, the GX device chooses the appropriate BMS based on the system configuration.

Auto selected

Displays the BMS currently selected by the system when ‘Controlling BMS’ is set to ‘Automatic’.

Display & language

Adaptive brightness

Yes

Automatically adjusts screen brightness using the ambient light sensor (available only when a GX Touch is connected or on the Ekrano GX display).

Brightness

Configure the brightness manually between 0 and 100% when 'Adaptive brightness' is disabled.

Display off time

10 min

Sets the time delay before the display turns off automatically. Available options: 10 seconds, 30 seconds, 1 minute, 10 minutes, 30 minutes, or never.

Display mode

Select between light and dark mode for the interface appearance.

Brief view levels

Allows configuration of the parameters and their units for the Brief view display.

Language

English

Select the desired language for the interface.

Units

Choose the preferred units for displaying electrical power, temperature, and volume.

Minimum and maximum gauge ranges

Auto-ranging

Allows manual adjustment of the minimum and maximum gauge ranges, or lets the ‘Auto-ranging' setting handle it automatically.

Start page

Brief

This menu allows you to set the home screen and define a timeout period after which the system will automatically return to the designated home screen following inactivity.

User interface

New UI

Select your preferred UI: New UI or Classic UI.

VRM online portal - Read full feature description

VRM Portal

Full

This setting determines the system’s connection to the VRM portal:

VRM Portal ID

-

Use this ID string when registering the GX device on the VRM Portal.

Log interval

15 minutes

Set the interval between data logs to any value from 1 minute to 1 day.

For systems with unstable connections, a longer interval is recommended.

Use secure connection (HTTPS)

Enabled

Encrypts communication between the GX device and the VRM server using HTTPS for secure data transmission.

Last contact

-

Displays the time elapsed since the GX device last communicated with the VRM server.

Connection status

No error

Shows the current status of the VRM connection.

If there is a communication error, it will be displayed here.

See here for more details on troubleshooting VRM errors.

Reboot device when no contact

Disabled

When enabled, the GX device will automatically reboot after a set delay if the internet connection is lost. This can help resolve temporary networking issues.

No contact reset delay (hh:mm)

01:00

Defines how long the GX device must be offline before it automatically restarts to restore connectivity.

Storage location

Internal storage

Indicates whether data is being stored on the internal memory or an external device such as a USB drive or microSD card, if mounted.

Free disk space

-

Displays the amount of available storage space on the current storage device.

microSD/USB

-

Use this option to safely eject a connected microSD card or USB storage device before removal.Removing it without ejecting may result in data loss.

Stored records

-

Displays the number of data records stored locally while the device is offline. The GX device will upload these records automatically once the internet connection is restored.

Oldest record age

-

Indicates how old the oldest locally stored record is, in cases where the GX device has been unable to connect to the internet or VRM.

ESS - An Energy Storage System (ESS) is a specific type of power system that integrates a power grid connection with a Victron Inverter/Charger, GX device and battery system. Read full feature description.

Mode

Optimized with BatteryLife

Options: Optimized with BatteryLife, Optimized without BatteryLife, Keep batteries charged, External control

Grid metering

Inverter/charger

Leave this setting at Inverter/charger if no external grid meter is used. Set to External meter when using a supported external energy meter.

Self-consumption from battery

All system loads

This setting allows for ESS to only use battery power for essential loads. Options are 'All system loads' or 'Only critical loads'.

Multiphase regulation

-

Use this setting in three-phase grid-connected systems. It enables phase compensation to help balance power flow across all phases.

Minimum SOC (unless grid fails)

10%

Configurable minimum SoC limit. ESS will supply loads from the grid once the SoC has fallen to the configured setting - except when the utility grid has failed and the system is in Inverter mode.

Active SOC limit

10%

Use this setting to see the current BatteryLife SoC level. Only in 'Optimized with BatteryLife' mode.

BatteryLife state

Self-Consumption

Displays the BatteryLife state, which can be one of the following: Self-consumption, Discharge disabled, Slow charge, Sustain, or Recharge.

Limit inverter power

Disabled

Limit the power drawn by the Multi: ie. limit the power being inverted from DC to AC.

Grid setpoint

50W

Defines the target power flow to the grid. A higher setpoint provides a buffer to help prevent unintentional energy export during sudden load changes.

Grid feed-in

-

Configure and limit the amount of power fed into the grid. Options include: AC-coupled PV - feed in excess, DC-coupled PV - feed in excess, Limit system feed-in. Also displays whether feed-in limiting is currently active.

Peak shaving

Above minimum SoC only

Above minimum SoC only, or Always. Also includes a submenu to manually set the system AC import and export current limits per phase.

Scheduled charge levels

Inactive

Allows configuration of up to five time periods during which the system will charge the battery using power from the grid.

Energy meters - Read full feature description

Role

Grid meter

Define the role of the energy meter.

Available options: Grid, PV inverter, Generator, AC load, EV Charger, Heat pump

Phase type

Single phase

Select the phase type of the system to be measured: either single-phase or multi-phase.

PV inverters - Read full feature description

Inverters:

-

Displays connected AC PV inverters.

Inv: Position

AC Input 1

AC input 1, AC input 2, AC Output

Inv: Phase

L1

Inv: Show

Yes

Find PV inverters

-

Scan for available PV inverters.

Detected IP addresses

-

Displays the IP address of PV inverters that have been discovered.

Add IP address manually

-

If an inverter has a manually assigned IP address, you can add it directly here.

Automatic scanning

Enabled

This setting will continue to look for PV inverters, this can be useful if using a DHCP assigned IP address that might change.

Wireless AC sensors (if applicable)

Select the position for each AC sensor (PV Inverter on AC-input 1, 2 or on AC-output). More information about the Wireless AC sensors.

Modbus TCP/UDP devices

Automatic scanning

Enabled

Scans automatically for Modbus TCP/UDP devices.

Scan for devices

Press to scan

Manually trigger a scan for Modbus TCP/UDP devices.

Saved devices

-

Displays a list of found Modbus TCP/UDP devices and their IP address.

Discovered devices

-

Displays a list of discovered Modbus TCP/UDP devices. Use this menu to activate these devices.

Ethernet - read full feature description

State

Unplugged

Indicates the current connection status of the device: Unplugged, Connecting, or Connected.

MAC address

-

Displays the unique hardware address of the network interface. Used for network identification and troubleshooting.

IP configuration

Automatic

Options: Automatic (DHCP) and manual IP address allocation

IP address

-

Shows the current IP address assigned to the device for network communication.

Netmask

-

Displays the subnet mask used to define the local network range.

Gateway

-

Displays the IP address of the network gateway used to access external networks, such as the internet.

DNS server

-

Displays the IP address of the DNS (Domain Name System) server used to resolve domain names into IP addresses.

Link-local IP address

-

Displays the automatically assigned IP address used for local network communication when no DHCP server is available. Typically in the 169.254.x.x range.

WiFi - Read full feature description

Create access point

Enabled

Enables or disables the internal WiFi access point of the GX device. Disabling it turns off the device’s ability to broadcast its own network.

Wi-Fi networks

-

Displays the list of available WiFi networks and the network currently connected to the GX device, if any.

State

Connected

Indicates the current WiFi connection status of the GX device. Possible values: Connected, Connecting, or Disconnected.

Name

-

Displays the SSID (network name) of the connected or selected WiFi network.

Forget network

Forget

Press to remove the saved WiFi network configuration. Use this when switching to a different network or troubleshooting connection issues.

Signal strength

%

Displays the WiFi signal strength as a percentage (%), indicating the quality of the wireless connection.

IP configuration

Automatic

Choose between Automatic (DHCP) and Manual IP address configuration.

IP address

-

Shows the current IP address assigned to the device for network communication.

Netmask

-

Displays the subnet mask used to define the local network range.

Gateway

-

Displays the IP address of the network gateway used to access external networks, such as the internet.

DNS server

-

Displays the IP address of the DNS (Domain Name System) server used to resolve domain names into IP addresses.

GSM modem - Read full feature description

Bluetooth

Enabled

Yes

Allows you to enable or disable the device’s Bluetooth functionality.

Pincode

000000 (or a unique PIN code supplied with the device or set manually)

GPS - Read full feature description

GPS information

-

Displays GPS data including: Status, Latitude, Longitude, Speed, Course, Altitude, and Number of satellites in view.

Device

-

Displays device related information for diagnostic.

Format

DDD.DDDDD°

Select between decimal degrees, degrees and decimal minutes or degrees, minutes and seconds display.

Speed unit

km/h

Select between km/h, meters per second, miles per hour, or knots.

Generator start/stop - Read full feature description

Autostart functionality

Disabled

Enable or disable the generator’s Autostart feature. Further configuration is available under Generator → Settings → Conditions.

Manual control

-

Allows manual generator operation for a specified duration.

State

Stopped

Shows the state of the generator.

Possible state messages:

Stopped, Warm-up, Manually started, Running by condition, Cool-down, Stopping

Error

No error

Displays if there is an error (e.g. generator is supposed to be running but no AC input is detected)

Settings

Contains submenus for Conditions, Warm-up & Cool-down, and Quiet Hours. Also includes a switch to enable an alarm if the generator is not in Autostart mode.

Run time and service

Displays the total generator runtime, daily runtime, time remaining until the next service, and the configured service interval. Includes options to reset both the service timer and the daily runtime counter.

Generator start/stop → Settings → Conditions

On loss of communication

Stop generator

Defines what the system should do if communication with the GX device is lost. Options: Stop generator, Start generator, Keep generator running.

Stop generator when AC input is available

Disabled

Useful for backup systems where a Quattro is connected to mains on one AC input and a generator on the other. When enabled, the generator will stop automatically once mains power becomes available again.

Battery SOC

Disabled

Use the battery state of charge (SoC) to control generator start and stop behaviour. Enable to activate.

Start when SoC is lower than the defined percentage.

A separate start value can be set for quiet hours to override them if necessary.

Start after the SOC condition is reached for [seconds].

Stop when SoC is higher than the defined percentage.

A separate stop value for quiet hours can be set to minimise runtime once the system has stabilised.

A separate stop value can be set for quiet hours to override them if necessary.

Battery current

Battery voltage

AC output

Disabled

Use the battery current, or battery voltage or AC output to control generator start and stop behaviour. Enable to activate.

Start when value is higher than - Amps / Voltage / Watts.

Start value during quiet hours - Amps / Voltage / Watts (to override programmed quiet hours when absolutely necessary).

Start after condition is reached for [seconds] (to allow for momentary spikes to pass without triggering start).

Stop when value is lower than - Amps / Voltage / Watts.

Stop value during quiet hours - Amps / Voltage / Watts (allows for less runtime during quiet hours, once system is recovered).

Stop after the condition is reached for [seconds] (to allow for momentary dips without stopping the running generator).

Inverter high temperature

Inverter overload

Disabled

Use inverter high temperature warning or inverter overload warning to control generator start and stop behaviour. Enable to activate.

Start when warning is active for [seconds] (to allow for momentary spikes to pass without triggering start).

When warning is cleared stop after [seconds] (to allow for momentary dips without stopping the running generator).

On inverter overload warning it also allows to skip generator warm-up.

Generator start/stop → Settings → Conditions → Periodic run

Periodic run

Disabled

Enable - No / Yes

Run interval [days]

Skip run if has been running for: Start always, 1, 2, 4, 6, 8, 10 hours.

Run interval start [date]

Start time [hh:mm]

Run duration (hh:mm)

Run until battery is fully charged. Default is disabled.

Generator start/stop → Settings

Detect generator at AC input

Disabled

When enabled, the system will trigger an alarm if no power from the generator is detected at the selected inverter AC input. Ensure that the correct AC input is assigned to “Generator” in the system setup.

Alarm when generator is not in autostart mode

Disabled

When enabled, an alarm will trigger if the autostart function remains disabled for more than 10 minutes.

Quiet hours

Disabled

Quiet hours will prevent normal generator run conditions from starting the generator. It is possible for some settings to specify override values to the quiet hours (an extremely low battery voltage trigger to prevent a system shutdown for example).

Generator start/stop → Settings → Warm-up & cool-down

Warm-up time

60

Sets the delay time for generator warm-up via relay control before it is connected to the system. During this time, the AC input relay remains open and the inverter/charger is not yet connected.

Cool-down time

180

Sets the delay time after the generator is disconnected from the system, allowing it to cool down before shutting off. The AC input relay remains open during this period.

Generator stop time

0

Generator start/stop → Run time and service

Generator total run time (hours)

Hours

Displays the total number of hours the generator has operated.

Daily run time

Submenu displaying the daily run time for the last 30 days.

Reset daily run time counters

Provides an option to reset the generator’s run time counters. This is useful after generator replacement, major repairs, or when the counters are used for service tracking.

Runtime until service

Hours

Displays the remaining run time before the next scheduled service.Enter the desired service interval in hours.

Generator service interval

Hours

Set the generator’s service interval in hours. This defines how often maintenance is required based on run time.

Reset service timer

Press to reset the service timer after the service is complete.

Tank pump - Configure automatic starting and stopping of pump based on tank level(sender) information. Pump auto start/stop with Color Control GX

Pump state

-

Indicates whether the pump is currently running or stopped.

Mode

Auto

Defines the pump control mode. Options are Auto, On, and Off. This acts as a manual override when a tank sensor is connected and start/stop levels are defined.

Tank Sensor

No tank sensor

Select the tank sensor used to trigger the pump. If no sensor is connected or detected, “No tank sensor” will be shown.

Start level

50%

Defines the tank level at which the pump will start (relay closes). When the measured level falls below this value, the pump is activated.

Stop level

80%

Defines the tank level at which the pump will stop (relay opens). When the measured level rises above this value, the pump is deactivated.

Relay

Function

Alarm relay

Selects the function assigned to the relay. Available options include: Alarm relay, Genset start/stop, Connected genset helper relay, Tank pump, Temperature, and Manual.

When the relay is set to manual mode, a slider is displayed that allows you to turn the relay on or off manually.

Polarity

Normally open

Sets the relay polarity on the back of the GX device. Options are Normally open or Normally closed. Note: Using Normally closed increases the power consumption of the GX device. This setting is only available when the relay is configured as an alarm relay.

Services

ModbusTCP

Disabled

This setting enables the ModbusTCP service. More information about ModbusTCP in this document and in the communications white paper https://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf

MQTT Access

Disabled

MQTT access only needs to be enabled when integrating a third party device or service like Home Assistant which requires access to the MQTT broker over the local network.

VE.Can port

-

Configures the CAN-bus profile for the VE.Can port(s). Available options include:

Disabled, VE.Can & Lynx Ion BMS (250 kbit/s), VE.Can & CAN-bus BMS (250 kbit/s), CAN-bus BMS LV (500 kbit/s), Oceanvolt (250 kbit/s), and RV-C (250 kbit/s).

Additional options include: Devices, NMEA2000-out, Unique Identity Number Selector, Check Unique ID Numbers, and Network Status.

BMS-Can port

-

Configures the BMS-Can port. Available options are: CAN-bus BMS (500 kbit/s) or Disabled. Also includes access to Network Status information.

I/O

Analog inputs

Controls the availability of analog inputs. Use this setting to enable or disable wired tank level sensors and temperature sensors.

Digital inputs

Disabled

Controls the function of digital inputs. Available options include: Off, Door alarm, Bilge pump, Bilge alarm, Burglar alarm, Smoke alarm, Fire alarm, CO₂ alarm, and Generator. On specific GX devices, additional options such as Touch input control and Pulse meter are also available.

Bluetooth sensors

Disabled

Enable this option to scan for supported Bluetooth sensors. You can also enable or disable discovered sensors and view currently connected Bluetooth adapters.

Note that there is also an option for continuous scanning of Bluetooth sensors. When enabled, it may interfere with Wi-Fi operation. For this reason, it is disabled by default.

Venus OS Large features

Signal K

Disabled

Enable this option to start the integrated Signal K server.

Node-RED

Disabled

Enable this option to start the integrated Node-RED environment.

VRM device instances

VRM device instances

Provides an overview of the device instance assignments used on VRM for all equipment connected to the GX device.