• Victron Connect App

  What is ‘AC Voltage Connection & Disconnection’ setting in VictronConnect?

  Posted by Nexus on January 20, 2024 at 7:56 am

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  In the ‘Grid’ section of the VictronConnect app (after connecting my Multiplus-II to my computer, using the MK3 USB interface device), there are settings for ‘AC Voltage Connection and Disconnection’. Can you explain how these voltage limits work and their role in managing the supply?

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

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  January 20, 2024 at 9:09 am

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  The ‘AC Voltage Connection and Disconnection’ settings in the VictronConnect app dictate the voltage thresholds at which the MultiPlus inverter/charger will accept or reject the AC power supply.

  AC Low Voltage Disconnect:

  • This setting determines the minimum voltage at which the MultiPlus will continue to draw power from the AC source. If the input voltage drops below this threshold (set as the lower limit), the MultiPlus will disconnect from the AC source to protect your system from undervoltage issues.

  AC Low Voltage Connect:

  • After a disconnection due to low voltage, this setting specifies the voltage at which the MultiPlus will reconnect to the AC source, ensuring the voltage has stabilized at an acceptable level.

  AC High Voltage Connect:

  • This sets the voltage at which the MultiPlus will connect to the AC source when coming from a high voltage disconnect state, confirming the voltage has returned to a safe operating level.

  AC High Voltage Disconnect:

  • Conversely, if the AC input voltage rises above this upper limit, the MultiPlus will disconnect to prevent overvoltage damage to the system.

  Charger Output Reduction:

  • In cases where the input voltage is close to the lower limit, the MultiPlus can reduce its charger output to a minimum to avoid further voltage drop on the AC source, which could be caused by the charger drawing too much current.

  • This is a protective feature that helps maintain the stability of the input voltage and prevents unnecessary cycling of the connection/disconnection relays.

  These settings are particularly important for systems that might be connected to less stable power sources, such as portable generators or variable quality grid power. They ensure the inverter/charger operates within safe voltage parameters, which is crucial for the longevity of the system and the safety of connected loads.

  Adjusting these values requires a careful understanding of your AC source’s voltage range and your system’s tolerance for voltage variations.

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