Manual - BMV-702

To access and change setting parameters use the buttons on the head unit in the following way:

To access and change setting parameters do the following:

For information on how to connect with the VictronConnect app to the battery monitor, see the The VictronConnect app chapter.

In the settings menu you can find the following 3 symbols:

Save settings to file - This will save settings for reference or for later use.

Load settings from file - This will load earlier saved settings.

Share settings file – This allows you to share the settings file via email, message, airdrop and so on. The available sharing options depend on the platform used.

For more information on these features, see the VictronConnect manual.

This parameter is used to tell the battery monitor how big the battery is. This setting should already have been done during the initial installation.

The setting is the battery capacity in Amp-hours (Ah).

For more information on the battery capacity and the related Peukert exponent see the Battery capacity and Peukert exponent chapter.

The battery voltage must be above this voltage level to consider the battery as fully charged. As soon as the battery monitor detects that the voltage of the battery has reached this “charged voltage” parameter and the current has dropped below the “tail current” parameter for a certain amount of time, the battery monitor will set the state of charge to 100%.

The “charged voltage” parameter should be set to 0.2V or 0.3V below the float voltage of the charger.

The table below indicates the recommended settings for lead acid batteries.

The “Discharge floor” parameter is used in the "time remaining" calculation. The battery monitor calculates the time it takes until the set “discharge floor” has been reached. It is also used to set the state of charge alarm defaults.

For lead-acid batteries set this to 50% and for lithium set it lower.

Note that this setting only appears when accessing the battery monitor via the VictronConnect app. In case the battery monitor is accessed via the head unit, see the Low State of Charge (SoC) relay setting instead.

The battery is considered as fully charged once the charge current has dropped to less than this “Tail current” parameter. The “Tail current” parameter is expressed as a percentage of the battery capacity.

Note that some battery chargers stop charging when the current drops below a set threshold. In these cases, the tail current must be set higher than this threshold.

As soon as the battery monitor detects that the voltage of the battery has reached the set “Charged voltage” parameter and the current has dropped below this “Tail current” parameter for a certain amount of time, the battery monitor will set the state of charge to 100%.

This is the time the “Charged voltage” parameter and the “Tail current” parameter must be met in order to consider the battery fully charged.

Set the Peukert exponent parameter according to the battery specification sheet. If the Peukert exponent is unknown, set it at 1.25 for lead-acid batteries and set it at 1.05 for lithium batteries. A value of 1.00 disables the Peukert compensation. The Peukert value for lead-acid batteries can be calculated. For more information on the Peukert calculation, the Peukert exponent and how this relates to the battery capacity, see the Battery capacity and Peukert exponent chapter.

The “Charge Efficiency Factor” compensates for the capacity (Ah) losses during charging. A setting of 100% means that there are no losses.

A charge efficiency of 95% means that 10Ah must be transferred to the battery to get 9.5Ah actually stored in the battery. The charge efficiency of a battery depends on battery type, age and usage. The battery monitor takes this phenomenon into account with the charge efficiency factor.

The charge efficiency of a lead acid battery is almost 100% as long as no gas generation takes place. Gassing means that part of the charge current is not transformed into chemical energy, which is stored in the plates of the battery, but is used to decompose water into oxygen and hydrogen gas (highly explosive!). The energy stored in the plates can be retrieved during the next discharge, whereas the energy used to decompose water is lost. Gassing can easily be observed in flooded batteries. Please note that the ‘oxygen only’ end of the charge phase of sealed (VRLA) gel and AGM batteries also results in a reduced charge efficiency.

When the current measured falls below the “Current threshold” parameter it will be considered zero. The “Current threshold” is used to cancel out very small currents that can negatively affect the long-term state of charge readout in noisy environments. For example, if the actual long-term current is 0.0A and, due to injected noise or small offsets, the battery monitor measures ­0.05A the battery monitor might, in the long term, incorrectly indicate that the battery is empty or will need to be recharged. When the current threshold in this example is set to 0.1A, the battery monitor calculates with 0.0A so that errors are eliminated.

A value of 0.0A disables this function.

The time-to-go averaging period specifies the time window (in minutes) that the moving averaging filter works. A value of 0 (zero) disables the filter and gives an instantaneous (real-time) readout. However, the displayed “Time remaining” value may fluctuate heavily. Selecting the longest time, 12 minutes, will ensure that only long-term load fluctuations are included in the “Time remaining” calculations.

This setting determines the behaviour of the state of charge (SOC) value following a battery monitor reset. A reset occurs when the battery monitor is powered down and subsequently powered up again. This occurs during initial installation or disconnection, such as on a boat when the DC system is disconnected via the main DC breaker.

With this setting, you can manually set the state of charge value. This setting is only active after the battery monitor has, at least once, been synchronised. Either automatically or manually.

This setting is only available when accessing the battery monitor via the VictronConnect app.

Setting 10

This option can be used to manually synchronise the battery monitor.

When navigating to this setting on the head unit , press the SELECT button to synchronize the battery monitor to 100%.

In the VictronConnect app press the ”Synchronise” button to synchronise the battery monitor to 100%.

See the Manual synchronisation paragraph for more information on this setting.

Setting 09

This option can be used to calibrate the zero reading if the battery monitor reads a non-zero current even when there is no load and the battery is not being charged.

A zero current calibration is (almost) never needed. Only perform this procedure in case the battery monitor shows a current while you are absolutely sure that there is no actual current flowing. The only way to be sure is to physically disconnect all wires and cables connected to the LOAD AND CHARGER side of the shunt. Do this by unscrewing the shunt bolt and removing all cables and wires from that side of the shunt. The alternative, switching loads or chargers off, is NOT accurate enough as this does not eliminate small standby currents.

Ensure that there really is no current flowing into or out of the battery (disconnect the cable between the load and the shunt), then press SELECT in the head unit menu or press CALIBRATE in the VictronConnect app.

Performing a zero current calibration.

This setting has the following relay modes, namely:

This function enables selection between a normally de-energised (contact open) or a normally energised (contact closed) relay.

When inverted, the open and closed conditions as described in all the relay settings are inverted (with the exception of the Relay state).

Note that the "normally energised" setting will slightly increase the power consumption of the battery monitor.

This is a read-only parameter and it displays whether the relay is open or closed (de-energised or energised).

Sets the minimum time the "closed" condition will remain present after the relay has been energised.

Note that this changes to "open" and de-energised if the relay function has been inverted (Invert relay setting).

An application example is to set a minimum generator run time when the relay is set to "charger" mode (Relay mode setting).

Sets the amount of time the "de-energise relay" condition must be present before the relay opens.

An application example is to keep a generator running for a while to charge the battery better when the relay is set to "charger" mode (Relay mode setting).

When the state of charge percentage has fallen below the "set relay" value, the relay will close.

When the state of charge percentage has risen above the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

The "clear relay" value needs to be greater than the "set relay" value.

When the battery voltage falls below the "set relay" value for more than 10 seconds the relay will close.

When the battery voltage rises above the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

The "clear relay" value needs to be greater than the "set relay" value.

When the battery voltage rises above the "set relay" value for more than 10 seconds the relay will close.

When the battery voltage falls below the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

The "clear relay" value needs to be greater than the "set relay" value.

This setting is available if the aux input has been set to "Starter battery", see the Aux input setting.

When the auxiliary (e.g. starter battery) voltage falls below "set relay" value for more than 10 seconds, the relay will be closed.

When the auxiliary voltage rises above the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

The "clear relay" value needs to be greater than the "set relay" value.

This setting is available if the aux input has been set to "Starter battery", see the Aux input setting.

When the auxiliary (e.g. starter battery) voltage rises above the "set relay" value for more than 10 seconds, the relay will be closed.

When the auxiliary voltage falls below the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

The "clear relay" value needs to be greater than the "set relay" value.

This setting is available if the aux input has been set to "Temperature", see the Aux input setting.

Use the Temperature unit setting to choose between °C or °F temperature units.

When the battery temperature drops below the "set relay" value for more than 10 seconds the relay will close.

When the battery temperature rises above the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

This setting is available if the aux input has been set to "Mid point", see the Aux input setting.

See the chapter Midpoint voltage monitoring for more information about the midpoint voltage.

When the midpoint voltage deviation rises above the "set relay" value, the relay will close.

When the midpoint voltage deviation falls below the "clear relay" value, the relay will open (after a delay, depending on the Relay minimum closed time and/or the Relay off delay settings).

When enabled (set to ON), the buzzer will sound an alarm as soon as an alarm condition occurs. After a button is pressed, the buzzer will stop sounding.

When disabled (set to OFF) the buzzer will not sound an alarm.

When enabled, the alarm will activate when the state of charge (SoC) falls below the set value for more than 10 seconds. The alarm will deactivate when the state of charge rises above the clear value

When enabled, the alarm will activate when the battery voltage falls below the set value for more than 10 seconds. The alarm will deactivate when the battery voltage rises above the clear value.

When enabled, the alarm will activate when the battery voltage rises above the set value for more than 10 seconds. The alarm will deactivate when the battery voltage drops below the clear value.

This setting is only available if the Aux input has been set to “Starter battery”, see chapter Aux input.

When enabled, the alarm will activate when the starter battery voltage falls below the set value for more than 10 seconds. The alarm will deactivate when the starter battery voltage rises above the clear value.

This setting is only available if the Aux input has been set to “Starter battery”, see chapter Aux input.

When enabled, the alarm will activate when the starter battery voltage rises above the set value for more than 10 seconds and the alarm will deactivate when the starter battery voltage drops below the clear value.

This setting is only available if the Aux input has been set to “temperature”, see chapter Aux input.

When enabled, the alarm will activate when the battery temperature rises above the set value for more than 10 seconds. The alarm will deactivate when the battery temperature drops below the clear value.

This setting is only available if the Aux input has been set to “temperature”, see chapter Aux input.

When enabled, the alarm will activate when the battery temperature falls below the set value for more than 10 seconds. The alarm will deactivate when the battery temperature rises above the clear value.

This setting is only available if the Aux input has been set to “Midpoint”; see chapter Aux input.

When enabled, the alarm will activate when the midpoint voltage deviation rises above the set value for more than 10 seconds. The alarm will deactivate when the midpoint voltage deviation drops below the clear value.

The intensity of the backlight This setting ranges from 0 (always off) to 9 (maximum intensity).

When set the backlight will not automatically turn off after 60 seconds of inactivity.

The scroll speed of the display. This setting ranges from 1 (very slow) to 5 (very fast).

Must be set to ON to display the voltage of the main battery in the monitoring menu.

Must be set to ON to display the current in the monitoring menu.

Must be set to ON to display the power measurement in the monitoring menu.

Must be set to ON to display the consumed Ah in the monitoring menu.

Must be set to ON to display the battery state of charge in the monitoring menu.

Must be set to ON to display the state of charge in the monitoring menu.

Must be set to ON to display the auxiliary voltage in the monitoring menu.

Must be set to ON to display the battery temperature in the monitoring menu.

Must be set to ON to display the midpoint deviation percentage in the monitoring menu.

Setting 61

This is a read-only setting. it displays the firmware version of the battery monitor.

The software version as displayed on the head unit is the same as the firmware version as displayed in the VictronConnect app product settings. In addition to this, the VictronConnect app also allows updating of the firmware. For more information see the Firmware setting.

Setting 62

This head unit setting resets all settings to factory default.

The defaults can also be restored via the VictronConnect app. For more information on how to do this see the Reset to defaults chapter.

To restore defaults do the following:

Note that restoring the defaults does not clear the history settings. To clear the history see the Clear history setting.

When in normal operating mode, the factory settings can also be restored by pressing SETUP and SELECT simultaneously for 3 seconds on the head unit. Note that this is only possible if the Lock setup setting is off.

Setting 63

This setting resets all settings to factory default. To clear the history do the following:

The history can also be cleared via the VictronConnect app, for more information on how to do this see the Reset history chapter.

When on, all settings (except this one) are locked (read-only) and cannot be altered via the head unit. Note that they still can be altered via the VictronConnect app.

When a shunt other than the one supplied with the battery monitor is used, use this setting to set the rated current of the shunt.

When a shunt other than the one supplied with the battery monitor is used, use this setting to change the rated voltage of the shunt.

This setting is available if the aux input has been set to "Temperature", see the Aux input setting.

Use this setting to select the temperature unit the battery monitor head unit is using.

Note that this setting only affects the battery monitor head unit display and settings. To change the temperature unit in the VictronConnect app see Temperature unit setting.

This setting is available if the aux input has been set to "Temperature", see the Aux input setting.

The available battery capacity decreases with temperature. The temperature coefficient (delta T) is the percentage the battery capacity changes with temperature when temperature decreases to less than 20°C (above 20°C the influence of temperature on capacity is relatively low and is not taken into account). Typically, the reduction, compared to the capacity at 20°C, is 18% at 0°C and 40% at -20°C.

The unit of this value is “%cap/°C” or per cent capacity per degree Celsius.

The typical value (below 20°C) is 1%cap/°C for lead acid batteries, and 0.5%cap/°C for LFP batteries.

This setting sets the function of the auxiliary input. Select between: None, Starter battery, Midpoint or Temperature.

Note that if the battery monitor settings are accessed via the head unit, this setting will be part of the miscellaneous setting, and if accessed via VictronConnect it will be part of the battery settings.

For full information about this setting see the Battery SOC on reset chapter.

This setting can be found at the bottom of the history tab.

This setting can also be made via the head unit. For more information see the Clear historychapter.

Note that the PIN code is only applicable when connecting to the battery monitor via Bluetooth.

This setting can be found in the settings of the VictronConnect app itself. Leave the battery monitor by clicking on the ← arrow. This will bring you back to the device list of the VictronConnect app. Now, click on the menu symbol next to the battery monitor listing.

A new window will open which allows you to reset the PIN code back to its default: 000000. To be able to reset the PIN code you will need the enter the battery monitor unique PUK code. The PUK code is printed on the product information sticker on the Battery monitor.

This setting can be found in the settings of the VictronConnect app itself. Leave the battery monitor page by clicking on the ← arrow. This will bring you back to the device list of the VictronConnect app. Click on the menu symbol and then click on the settings symbol. Here you can select the “Display temperature unit”. Selecting Celsius will display the temperature in °C and selecting Fahrenheit will display the temperature in °F.

The serial number can be found in the battery monitor product info section of the VictronConnect app or on the product information sticker rear of the battery monitor head unit.

In the battery monitor product information screen, you can change the name of the battery monitor. By default, it is called by its product name. But a more applicable name might be needed, especially if you are using multiple battery monitors in close proximity of each other it might become confusing with which battery monitor you are communicating. You can, for example, add identification numbers to their name, like: Battery Monitor A, Battery Monitor B and so on.

The battery monitor runs on firmware.

Occasionally a newer firmware version is available. New firmware is released to either add features or to fix a bug. The product overview in the VictronConnect app displays the battery monitor firmware version. It also indicates whether the firmware is the latest version, and there is a button you can press to update the firmware.

On the first installation, it is always recommended to update to the most recent firmware (if available). Whenever you connect to the battery monitor with an up-to-date version of the VictronConnect app, it will check the firmware, and if there is a newer version available, it will ask you to update the firmware. The VictronConnect app contains the actual firmware files, so an internet connection is not needed to update to the most recent firmware as long as you are using the most up-to-date version of the VictronConnect app.

A firmware update is not mandatory. If you choose not to update the firmware, you can only read out the battery monitor, but you cannot change settings. Settings can only be changed if the battery monitor runs on the most recent firmware.

For more information on firmware updates also see the VictronConnect app manual Firmware update chapter.

This setting is also available via the head unit Software version setting. But note that this is a read-only setting. The firmware cannot be updated via the head unit.

To set all settings back to default select “Reset to defaults”. Please note that this only resets all settings to their default values, the history is not reset.

This setting is also available via the head unit. For more information see the Restore defaults chapter.