5. Configuration
5.1. Menu structure and configurable parameters
After completing the installation and setting up the internet connection (if required), go through the menu from top to bottom to configure the Cerbo-S GX:
Item | Default | Description |
|---|---|---|
General | ||
Access level | User and installer | Set this to 'User' to prevent accidental and unwanted changes to the configuration. Installer has additional privileges and once changed from default requires a password. Password is available from your dealer. |
Remote support | No | No / Yes - Enable this to allow Victron engineers to access your system in case there is a problem. |
Reboot? | Reboots the GX device | |
Audible alarm | Yes | When there is an alarm on the Cerbo-S GX or a connected product, the Cerbo-S GX will beep - unless this setting is set to 'Off'. |
Demo mode | Disabled | Demonstrates product and installation features to a client or at an exhibition. This simulation mode will allow better understanding without (yet) changing any settings. Note that this will add simulated devices to a VRM installation. Demos for ESS, Boat and Motorhome are available. |
Firmware | ||
Firmware Version | x.xx | Displays the currently installed firmware version. |
Build daate/time | xxx | Displays the build number. |
NoteNote that for most system applications our advise is to keep automatic updates disabled; as is also the default factory setting. Instead, update the system at a convenient moment; when people are on location and ready to revert to a previous system and/or troubleshoot in case of issues. | ||
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 to | Latest release | Use the default setting unless you want to participate in test versions. End-user systems should certainly be set to 'Latest release'. |
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 | - |
Date/Time local | Automatic from internet | When connected to the internet, time will be automatically synchronised regardless of this setting. Toggle this setting to Manually input the time where no internet connection is present. |
Change time zone | Select the correct local time zone. | |
Remote Console - Read full feature description | ||
Disable password check | Password authentication not required for remote console access. | |
Enable password check | Choose password to allow remote console access. | |
Enable on VRM | No | No / Yes - Enabling on VRM will allow connection to the Cerbo-S GX from anywhere via the VRM portal. Troubleshooting Remote Console on VRM |
Remote Console on VRM - Status | - | Displays the connection state of the VRM Remote Console Feature, eg Online, Offline, Disabled. |
Enable on LAN | No | No / Yes - Enabling will allow direct connection to the Cerbo-S GX by typing its IP address or Venus.local into a web browser, or in VictronConnect when connected to the same network. Only Enable this function on trusted networks. Disable password check, or set password first |
System setup | ||
System name | Automatic | Select the system name - presets or user defined |
AC input 1 | Generator | Select Generator, Grid or Shore power. Note additional configuration is required for complete setup of these options. |
AC input 2 | Grid | Same choices as above. |
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 BMV. More details. |
Has DC system | No | 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. |
Battery Measurements | Not set | Use this menu to define which battery measurement to see on the VRM portal and the MFD HTML5 app. |
System status | On/Off | The following parameters are diagnostic flags only. See section xyz for details: Synchronize VE.Bus SoC with battery. Use solar charger current to improve VE.Bus SoC. Solar charger voltage control Solar charger current control BMS control |
DVCC | No | Enabling DVCC changes a GX device from a passive monitor into an active controller. Default setting is No, unless a compatible BMS-Can managed battery is connected, then setting is set and locked to manufacturers specification. |
Limit charge current | No | No / Yes - User-configurable system wide maximum charge current setting in Amps. |
SVS - Shared voltage sense | No | No / Yes - The GX device automatically selects the best available voltage measurement and shares it with other connected devices. |
STS - Shared temperature sense | No | No / Yes - The GX device will send the measured battery temperature to the inverter/charger system as well as all connected solar chargers. |
Temperature sensor | Automatic | Select the temperature sensor to use for shared temperature sense measurement. |
SCS - Shared current sense | No | Forwards the battery current, as measured by a battery monitor connected to the GX device, to all connected solar chargers. |
SCS status | Describes if SCS is enabled, or why it is disabled | |
Display & language | ||
Brightness | Configure the brightness between 0 and 100% | |
Display off time | Set time-to-off between 10s / 30s - 1m / 10m /30m - or never | |
Show mobile overview | No | Enable this to show the mobile overview page which is designed for Marine and Remote Vehicle applications. This overview gives direct access to the AC Current limit as well as the On/Off/Charger-only settings and pump control. Also shows up to four tank levels. |
Language | English | Choose between English, Dutch, Chinese, German, Spanish, French, Italian, Swedish, Turkish and Arabic. |
Units | °C | The available options are Celsius and Fahrenheit. Please note that this setting does not affect the temperature unit in the VRM portal. |
VRM online portal - Read full feature description | ||
Logging enabled | Enabled | - |
VRM Portal ID | - | Use this value when registering the GX device onto the VRM Portal |
Log interval | 15 minutes | Set to anything between 1 minute and 1 day. Choose longer times on systems with an unreliable connection. Note that this setting does not affect reporting problems and state changes (bulk → absorption) to the VRM Portal. These events initiate an immediate transmission of all parameters. |
Use secure connection (HTTPS) | Yes | This encrypts the communication between the GX device and the VRM server. |
Last contact | - | Time since the VRM server was last contacted. |
Connection error | - | Displayed if there is an error in VRM communications. See here for more details on troubleshooting VRM errors. |
VRM two-way communication | No | Enable remote configuration and firmware updates. |
Reboot device when no contact | No | The GX device will reset itself to attempt to correct a potential networking issue if the internet connection is lost for the set delay period. |
No contact reset delay (hh:mm) | 01:00 | How long the unit must be offline before restarting itself |
Storage location | Internal storage | Displays if an external storage device (eg USB drive or microSD card) is mounted, or the internal storage is in use. |
Free disk space | - | |
microSD/USB | - | Select to Safely Eject an external microSD or USB storage (if one is connected) before physically removing it. Failure to do so can cause data loss. |
Stored records | - | How many records are stored locally when no internet connection is available. The GX device will store as many records as it can locally, then upload them when internet is available again. |
Oldest record age | - | If internet/VRM is not available, then this will display the oldest record stored on the GX device. |
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) | Optimized (with BatteryLife) and Optimized (without BatteryLife), Keep batteries charged, External control |
Grid Meter | Leave default when there is no External Victron grid meter is installed. | |
Inverter AC output in use | Yes | Setting this to 'No' hides the AC-out graphic in the overview pane. |
Multiphase regulation | - | Use the Phase compensation setting in systems with a three-phase connection to the utility grid. |
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. |
BatteryLife state | Self-Consumption | Self-consumption, Discharge disabled, Slow charge, Sustain, Recharge |
Limit charge power | No | This setting limits the flow of power from AC to DC for battery charging from AC-in. |
Limit inverter power | No | Limit the power drawn by the Multi: ie. limit the power being inverted from DC to AC. |
Grid setpoint | 50W | This sets the point at which power is taken from the grid when the installation is in self-consumption mode. |
Scheduled charging | No | Allows you to set up to five scheduled periods, during which the system will take power from the grid to charge the battery. |
Energy meters - Read full feature description | ||
Role | Grid meter | Grid meter, PV inverter, Generator, AC load |
Phase type | Single phase | |
Modbus unit ID | 30 | |
PV inverters - Read full feature description | ||
Inverters: | Shows 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 | Shows 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 | Yes | 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 | ||
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. | ||
Ethernet - read full feature description | ||
State | Connected | |
MAC address | - | |
IP configuration | Automatic | |
IP address | - | |
Netmask | - | |
Gateway | - | |
DNS server | - | |
Link-local IP address | - | |
Select the configuration type (DHCP vs. manual configuration) and IP settings. | ||
Create access point | ||
Wi-Fi networks | ||
Name | ||
Connect to network | ||
Forget network | ||
Signal strength | ||
MAC address | ||
IP configuration | ||
IP address | ||
Netmask | ||
Gateway | ||
DNS server | ||
Manage wireless networks and IP settings. | ||
GSM modem - Read full feature description | ||
GPS information | Status, Latitude, Longitude, Speed, Course, Altitude, Number of satellites | |
Format | Select the format in which to show the Latitude and Longitude. | |
Speed unit | km/h | Choose between km/h, meters per second, miles per hour, or knots. |
Device | Connected, Connection, Product, Product ID, Firmware version, Device instance | |
Generator start/stop | ||
Configure generator autostart settings and conditions. Read full feature description | ||
State | Displays if the generator is running or not | |
Error | Displays if there is error (eg generator is supposed to be running but no AC input is detected) | |
Total run time | Total time the generator has been running since reset. | |
Time to next test run | If a periodic run is programmed, this counter will display in days, and hours how long before that will occur. | |
Auto start functionality | Enable or Disable the Autostart functions, this can be further configured in the Generator -> Settings -> Conditions menu | |
Manual start | Start generator, Run for hh:mm | |
Daily run time | Submenu shows the history of time generator has been running (minutes) each day for the previous 30 days. | |
Generator start/stop -> Settings | ||
Generator start/stop -> Settings -> Conditions | ||
On loss of communication | Stop generator | Stop, Start, Keep generator running |
Do not run generator when AC1 is in use | No | This option is ideal for back-up systems where a Quattro has mains/grid electricity connected to its AC-in 1 terminal, and a Genset connected to its AC-in 2 terminal. With this option enabled, the Genset will only start after a mains failure. |
Battery SOC | No | Use Battery SOC value to start/stop - No / Yes Start when SOC is lower than - % Start value during quiet hours - % (to override programmed quiet hours when absolutely necessary) Stop when Battery SOC is higher than - % Stop value during quiet hours - % (allows for less runtime during quiet hours, once system is recovered) |
Battery current Battery voltage AC output | No | Use value to start/stop - No / Yess 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 | No | Start on value warning - No / Yes 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) |
Generator start/stop -> Settings -> Conditions -> Periodic run | ||
Periodic run | No | Enable - No / Yes Run interval Skip run if has been running for Run interval start date Start time Run duration (hh:mm) Run until battery is fully charged |
Generator start/stop -> Settings | ||
Minimum run time | 0 | The minimum number of minutes the generator will run for any time that it is started, even after stop conditions. |
Detect generator at AC input | No | No / Yes - An alarm will be triggered when no power from the generator is detected at the inverter AC input. Make sure that the correct AC input is set to generator on the system setup page. |
Quiet hours | 0 | 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) |
Reset daily run time counters | An option to reset generator run time counters, for example if these are used for service, or if the generator is replaced or majorly repaired. | |
Generator total run time (hours) | The total time the generator has been running since the counter was reset. | |
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 | Displays if the pump is running or not | |
Mode | Auto | Options are Auto, On and Off. This is the manual override to the start and stop level triggers when a tank sensor is connected. |
Tank Sensor | Automatic | Select the tank sensor that is used for the tank pump trigger. 'No tank sensor' will be displayed if no tank sensor is connected or detected, |
Start level | 50% | The trigger point of the tank level to start the tank pump (close the relay). |
Stop level | 80% | The trigger point of the tank level to stop the tank pump (open the relay). |
Relay | ||
Function | Alarm relay | Select the relay function. Possible functions are 'Alarm relay', 'Generator start/stop', 'Tank pump', 'Temperature', and 'None' (disabled). |
Polarity | Normally open | Select the polarity of the relay on the back of the Cerbo-S GX. 'Normally open' or 'Normally closed'. (Note that setting it to normally closed increases the Cerbo-S GX power draw.) |
Services | ||
ModbusTCP | Off | 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 on LAN (SSL) | On | Enables MQTT on LAN - More information on MQTT is available on Victron Community. |
MQTT on LAN (Plaintext) | Off | This setting is required to be enabled when connecting an Marine MFD |
VE.Can port | VE.Can | CAN-bus profile (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), Send data to VE.Can, Unique device number for VE.Can, Check unique numbers |
CAN-bus | CAN-bus profile, Send data to VE.Can, Unique device number for VE.Can, Check unique numbers | |
I/O | ||
Digital inputs | Off | Available Digital inputs Off, Door alarm, Bilge pump, Bilge alarm, Burglar alarm, Smoke alarm, Fire alarm, CO2 alarm, Generator |
When using a VE.Bus system, it is possible to configure the severity of problems on the VE.Bus system that should cause a notification to show up on the Cerbo-S GX (and make it beep):
Disabled: The Cerbo-S GX will never beep or show a notification
Alarm only: The Cerbo-S GX will only beep and show a notification when the VE.Bus system switched off in an alarm condition.
Enabled (default): The Cerbo-S GX will beep and show a notification
When all done, don't forget to change the access level to user when required.
5.2. Battery state of charge (SoC)
5.2.1. Which device should I use for SoC calculation?
There are three products types that calculate state of charge (SoC). The Cerbo-S GX itself does not calculate SoC, it only retrieves it from the connected devices.
The three products that calculate SoC are:
Battery Monitors, such as the BMVs, SmartShunt, Lynx Shunt, Lynx Smart BMS or the Lynx Ion BMS
Multi and Quattro inverter/chargers
Batteries with built-in battery monitor and a (mostly BMS-Can) connection to the Cerbo-S GX.
When to use what?
If you have a battery with built-in battery monitor, such as a BYD or Freedomwon battery; its easy. Use that.
If not, then the options depend on the type of system:
If the MultiPlus or Quattro inverter/charger is the only source of charge to the batteries and the only draw then it can function as a basic battery monitor because it counts what went in and counts what comes out. No need for a dedicated battery monitor such as the BMV.
If the systems consists of an inverter/charger, MPPTs and a GX device, then there is still no need to add a dedicated battery monitor.
For any other system types, such as a boat or RV with DC lights and other DC loads, a dedicated battery monitor will be required.
5.2.2. The different solutions explained in detail
(A) Battery and Multi or Quattro (a typical backup system)
No battery monitor is required: the Multi or Quattro is the only product connected to the battery and has full control over all charge and discharge currents. Therefore it can calculate the correct SoC itself.
Configuration:
Enable and configure the battery monitor in VEConfigure.
In the Cerbo-S GX, in Settings → System setup, verify the selected battery monitor. It should be set to the Multi or Quattro.
(B) Battery with Multi or Quattro and MPPT Solar Chargers -ALSO- An EasySolar with GX Device built-in
No battery monitor is required as long as all MPPT solar chargers are Victron products and are connected to the Cerbo-S GX. The Cerbo-S GX will continuously read the actual charge current from all solar chargers and send the total to the Multi (or Quattro), which then uses that information in its SoC calculations.
Configuration:
Enable and configure the battery monitor in VEConfigure.
On the Cerbo-S GX, in Settings → System setup, verify the selected battery monitor. It should be the Multi or Quattro.
In the System status menu, verify that the option 'Use solar charger current to improve VE.Bus SOC' is set to On. Note that this is not a setting - it just an indicator of an automatic process.
Note that this feature requires recent firmware versions in both the Multis or Quattros (402 minimum), and the Cerbo-S GX (v2.06 minimum).
(C) Batteries with a built-in battery monitor
In cases where the system includes a battery which has a built-in battery monitor and SoC calculation - such as many of the batteries listed here - a dedicated battery monitor is not required.
Configuration:
Connect the battery communications cable to the Cerbo-S GX according to the instructions.
In the Cerbo-S GX , in Settings → System setup, verify that the selected battery monitor is the battery.
Note that the battery monitor setting in VEConfigure is irrelevant. For systems like this, changing this setting will have no effect on the charge or any other parameters in this type of system.
(D) Other system types
When there are more chargers or loads than just the Multi or MPPT solar chargers connected to the battery, a dedicated battery monitor is required. Examples are:
House loads in Marine or Vehicle system.
PWM solar chargers
AC chargers, such as Skylla-is, Phoenix Smart IP43 chargers, non Victron chargers, etc.
Alternators
DC-DC chargers
Wind turbines
Hydro turbines
In case a battery with built-in monitor is used, such as explained in (C), then that is the dedicated battery monitor. Refer to section (C).
Otherwise install a BMV or Lynx Shunt VE.Can.
Configuration:
Configure the battery monitor as per its documentation.
In the Cerbo-S GX, in Settings → System setup, verify the selected battery monitor.
It should be the BMV, SmartShunt, Lynx Smart BMS or Lynx Shunt battery monitor.
Finished.
Note that the battery monitor setting in VEConfigure is irrelevant. For systems like this, changing this setting will have no effect on the charge - or any other parameters - in this type of system.
5.2.3. Notes on SoC
Note that this is all about showing an accurate state of charge to the user, rather than being required for an efficient system. The SoC percentage is not used for battery charging. It is, however, required when a generator needs to be started and stopped automatically based on battery SoC.
More information:
VRM Portal FAQ - difference between BMV SOC and VE.Bus SOC
See Configurable Parameters Section on Battery monitor selection and Has DC system.
5.2.4. Selecting SoC source
(Settings → System Setup → Battery monitor)
In the image below you can see a range of selectable choices for the SoC values which are shown in the main Overview screen. Choose the source you want to see on the main Overview screen of your Cerbo-S GX.
In the image above we have chosen the Automatic setting. When automatic is selected, the System setup screen will be as shown in the image below.
The 'Automatic' function uses the following logic:
When available, it will use a dedicated battery monitor, such as the BMV or a Lynx Shunt, or a battery with built-in battery monitor.
When there is more than one of those connected, it will use a random one - although you can select one manually.
When there is no dedicated battery monitor, it will use the VE.Bus SoC.
When should I use the 'No battery monitor' option?:
Use that in systems where:
there is a Multi or Quattro installed
no BMV or other battery monitor is installed
the system has other DC loads or other chargers connected to the same battery, which are not connected to the Cerbo-S GX.
A short explanation: The VE.Bus SOC determined by the Multi or Quattro is incorrect in the above situation as it does not take into account the discharge and charge currents by those other DC loads and also unmonitored chargers.
5.2.5. Details on VE.Bus SOC
While the Inverter/Charger is in bulk, the SoC will not rise above the value as set in VEConfigure for the 'State of charge when Bulk finished' parameter on the General tab; default 85%. In a system with solar chargers, make sure that the Absorption voltage as configured in the MPPT is slightly above the same setting in the inverter/charger. The latter needs to recognize that the battery voltage has reached the absorption level. If it doesn’t, the SoC will be stuck at the earlier mentioned End-of-bulk percentage, default 85%.
5.2.6. The System Status menu
The System Status menu contains diagnostic flags that can be useful in diagnosing problems with the system. Note that nothing can be configured here. The on/off flag depends on how a system is set up and what devices it contains.
 |
Their meaning in detail are:
Synchronise VE.Bus SoC with battery:
If On, it indicates that the activated battery monitor in the Multi/Quattro is synchronising its SoC with that of a better source (a BMV or BMS in the system). The system does that automatically.
Use solar charger current to improve VE.Bus SoC:
In a VE.Bus system with no other battery monitor (no BMS, no SmartShunt, no managed battery) but with solar chargers, the solar charge current is taken into account and helps improve the SoC calculation of the internal Multi/Quattro battery monitor. The system does this automatically and indicates that it is active by displaying On.
Solar charger voltage control:
If on, this indicates that the solar chargers are not following their own internal charge algorithm. They're getting a voltage setpoint from somewhere else. Either a) a managed battery or b) in an ESS system, they get it from the Multi/Quattro.
Solar charger current control:
This indicates that the solar chargers are current limited by the system. In most cases the limiting device is a managed battery or a user-defined Maximum charge current in the DVCC menu.
BMS control:
It indicates that the BMS is controlling the charge voltage setpoint (and not using the value set for absorption and float in the Multi/Quattro or solar charger).
5.3. Customize the logo on the Boat & Motorhome page
It is possible to use a custom logo onto the Boat & Motorhome page.
Type the following address into the web browser of a device connected to the same network. Using this address as a template: http://venus.local/logo.php or http://[ip-here]/logo.php (inserting your device’s IP address between the square brackets). The IP address can be found by going to Settings -> Ethernet or Wifi. Once the page is loaded, Choose an image file from your device. Re-boot the GX device.
5.4. Temperature relay
It is possible to configure the built in Relay 1, and Relay 2, to activate and deactivate based on temperature.
See Connecting Temperature Sensors section for compatibility and connection instructions. Confirm the temperature sensors are correctly connected and reporting temperature in the menu.
The temperature relay is controlled from Settings Menu -> Relay -> Function (Relay 1/2) -> Temperature
Once enabled, the Temperature control rules menu will appear in the Relay menu, and inside the temperature sensors that have been detected.
Each temperature sensor can be used to control the relay.
Select the temperature sensor you wish to use to control the relay. The temperature sensors that aren't used will display "No actions".
It is possible to enable or disable the temperature relay control for each temperature sensor within this menu.
In GX products where two relays are available (Cerbo GX & Cerbo-S GX) it is possible to have a single temperature sensor control both relays. It is also possible to have a single relay controlled by multiple different temperature sensors.
For example, a Cerbo GX with 2 lithium battery heat pads, and only using both simultaneously when necessary.
In the Relay -> Temperature control rules -> Temperature sensor menu
Enable Relay activation on temperature
Assign the relay control to Relay 1
Set the Activation value to 5 degrees
Set the Deactivation value to 10 degrees
If that is insufficient to maintain the battery temperature above 5 degrees, you may wish to connect a 2nd heat pad contactor to Relay 2 as well.
Move down menu to Condition 2
Assign the relay control to Relay 2
Set the Activation value to 4 degrees
Set the Deactivation value to 6 degrees
This will mean that Relay 1 will be active if the battery temperature falls to 5 degrees. If the temperature continues to fall below 5 degrees to 4 degrees, then the second heat pad will be engaged via Relay 2.
If that is sufficient to raise the temperature back to 6 degrees, Relay 2 will deactivate, and then Relay 1 will remain active until battery temperature returns to 10 degrees.
Note that the physical wiring contacts are available for both Relay 1 and Relay 2 in Normally Open, and Normally Closed configurations.
Caution
Note specifications for the power limits of the relays. It may be necessary to connect appliances via an additional contactor if power requirements exceed the relay power limit specification.