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What is ‘UPS Function’ in Grid settings of VictronConnect using Multiplus-II?
In the grid settings on my VictronConnect app (after connecting my Multiplus-II to my computer, using the MK3 USB interface device), there is an option called ‘UPS Function’. How does this setting operate, and what does it mean when it’s deselected, particularly concerning the supply waveform and inrush current?
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1 Reply
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The ‘UPS Function’ within the grid settings of the VictronConnect app affects how the MultiPlus inverter/charger responds to the quality and stability of the incoming AC supply, especially regarding waveform distortion.
Function When Selected:
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When the ‘UPS Function’ is enabled, the MultiPlus inverter/charger acts similarly to an Uninterruptible Power Supply (UPS).
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It becomes more critical of the incoming AC supply’s waveform.
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If the waveform is distorted beyond acceptable parameters, often the case during power outages or with poor quality generators, the MultiPlus will quickly switch to battery power to maintain a clean power supply to the connected loads.
Function When Deselected:
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If you deselect the ‘UPS Function’, the MultiPlus becomes less sensitive to waveform distortion, which means it can tolerate a lower quality AC supply without switching to battery power.
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Previously, deselecting this function activated a feature called “Allows inrush currents”. But now it will automatically enable inrush, without the need to additionally activate it.
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The previously labeled ‘Allow inrush current’ feature is designed to prevent the MultiPlus from tripping its lower voltage limit when such heavy start-up loads are encountered.
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This is particularly useful for starting heavy loads that require a significant amount of current at startup, such as motors or compressors.
Use Cases:
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If your priority is to protect sensitive electronics and ensure they are always supplied with a high-quality waveform, you would keep the ‘UPS Function’ selected.
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Conversely, if you’re using a generator that produces a less stable waveform or if you need to start heavy loads that cause inrush currents, you would deselect this function to allow the MultiPlus to handle these situations without disconnecting from the AC supply.
By managing the ‘UPS Function’ setting effectively, you ensure that the MultiPlus provides power to your connected devices in a manner that suits your specific power needs and conditions.
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