• Victron Connect App

  What is ‘Charge Current’ setting in VictronConnect using Multiplus-II?

  Posted by Jubael on January 20, 2024 at 8:02 am

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  In the VictronConnect app’s ‘Charger’ section (after connecting my Multiplus-II to my computer, using the MK3 USB interface device), there’s a ‘Charge Current’ setting for the bulk charging phase. Could you detail how to properly set this value and what factors might cause the actual charge current to differ from the set value?

  MysticMonkMoves replied 5 months, 2 weeks ago 2 Members · 1 Reply
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  MysticMonkMoves

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  January 20, 2024 at 9:00 am

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  The ‘Charge Current’ setting in the ‘Charger’ section of the VictronConnect app specifies the maximum current that the MultiPlus inverter/charger will use to charge the batteries during the bulk phase of the charging cycle.

  Function:

  • During the bulk phase, the charger delivers a constant current to the batteries until they reach a certain voltage level. The ‘Charge Current’ setting determines the intensity of that current.

  Setting the Value:

  • For lead-acid batteries, a good rule of thumb is to set the charging current at approximately 10-20% of the battery capacity. For example, if you have a 100 Ah battery bank, you’d set the charging current between 10A to 20A.

  Factors Affecting Actual Charge Current:

  • AC Input Limit: If the AC input current limit is set low and there is a high load demand from the system, the charger might reduce the charge current to accommodate the load.

  • Environmental Temperature: High ambient temperatures can lead to derating of the charge current to prevent overheating.

  • Cabling: Improper or insufficient cabling can introduce high ripple voltage, which can cause the charger to limit the current to protect the batteries.

  • System Load: The system’s DC consumption during charging can also affect the charge current. If significant power is being used by the system, there might be less available for charging.

  Usage Tips:

  • It’s essential to take into account the expected DC consumption of your system when setting the charge current.

  • You want to ensure that there is enough current to both run your system and charge your batteries efficiently.

  • Additionally, always consult your battery manufacturer’s guidelines to set the correct charging parameters for your specific battery type to ensure safety and longevity of the battery bank.

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