Manual - BMV-700H

On first connection the display of the head unit should be active.

If this is not the case check the fuse in the BATTERY + cable and also check the cable itself and its terminals.

Settings can only be changed if the battery monitor is running on the most up to date firmware. Update to the latest firmware with the VictronConnect app.

It is highly unlikely that the Bluetooth interface is faulty. Some pointers to try before seeking support:

For connection issues, see the troubleshooting section of the VictronConnect manual: https://www.victronenergy.com/live/victronconnect:start.

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

If you have lost the PIN code you will need to reset the PIN code to its default PIN code, see the Reset PIN code chapter.

More information and specific instructions can be found in the VictronConnect manual: https://www.victronenergy.com/live/victronconnect:start.

The charge current should be shown as a positive value. For example: 1.45A.

The discharge current should be shown as a negative value. For example: -1.45A.

If the charge and discharge currents are reversed, the negative power cables on the battery monitor must be swapped.

The negatives of all the loads and the charge sources in the system must be connected to the system minus side of the shunt.

If the negative of a load or a charge source is connected directly to the negative battery terminal or the “battery minus” side on the shunt, their current will not flow through the battery monitor and will be excluded from the overall current reading and the state of charge reading.

The battery monitor will display a higher state of charge than the actual state of charge of the battery.

If there is a current reading while no current is flowing through the battery monitor, perform a zero current calibration while all loads are turned off or set the current threshold.

An incorrect state of charge can be caused by a variety of reasons.

Incorrect battery settings

The following parameter(s) will have an effect on the state of charge calculations if they have been set up incorrectly:

Incorrect state of charge due to a synchronisation issue:

The state of charge is a calculated value and will need to be reset (synchronised) every now and then.

The synchronisation process is automatic and is performed each time the battery is fully charged. The battery monitor determines that the battery is fully charged when all 3 "charged" conditions have been met. The "charged" conditions are:

A practical example of the conditions that need to be met before a synchronisation will take place:

If the battery is not fully charged or if the automatic synchronisation does not happen, the state of charge value will start to drift and will eventually not represent the actual state of charge of the battery.

The following parameter(s) will have an effect on automatic synchronisation if they have been set incorrectly:

For more information on these parameters see the chapter: "Battery settings".

Incorrect state of charge due to incorrect current reading:

The state of charge is calculated by looking at how much current flows in and out of the battery. If the current reading is incorrect, the state of charge will also be incorrect. See paragraph Incomplete current reading.

This means that the battery monitor is in an unsynchronised state. This can occur when the battery monitor has just been installed or after it has been unpowered for some time and is being powered up again.

To fix this, fully charge the battery. Once the battery is close to a full charge, the battery monitor should synchronise automatically. If that doesn't work, review the synchronisation settings.

If you know the battery is fully charged but don't want to wait until the battery synchronises, then perform a manual synchronisation, see paragraph Synchronise SoC to 100%.

The battery monitor will automatically synchronise and reset the state of charge to 100% as soon as the battery has been fully charged. In case the battery monitor does not reach a 100% sate of charge, do the following:

One reason could be that the negative cables going in and out of the battery monitor have been wired the wrong way around, see Charge and discharge current are inverted.

This can happen when the battery monitor thinks the battery is bigger or smaller than in reality. Check if the battery capacity has been set correctly.

Check if there is an issue with the BATTERY + cable. Perhaps the fuse, the cable itself or one of the terminals is faulty or there is a loose connection.

Check for incorrect wiring: the BATTERY + cable has to be connected to the positive of the battery bank, not midway of the battery bank.

If the battery monitor does not synchronise automatically, one possibility could be that the battery never reaches a fully charged state. Fully charge the battery and see if the state of charge eventually indicates 100%.

Another possibility is that the charged voltage setting should be lowered and/or the tail current setting should be increased.

It is also possible that the battery monitor synchronises too early. This can happen in solar systems or in systems that have fluctuating charge currents. If this is the case change the following settings: