Victron energy Phoenix Multi Compact 12 800 35 User Manual (English)

Questions and Answers:

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jessica05Aug 11, 2025
How to fix a Victron energy Phoenix Multi Compact 12 800 35 that is not fully charging the battery?
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  Joel SchultzAug 11, 2025
  If your battery isn't charging fully, consider these potential causes and solutions: * Incorrect charging current: Set the charging current between 0.1 and 0.2 times the battery capacity. * Defective battery connection: Check the battery terminals. * Incorrect absorption voltage: Adjust the absorption voltage to the correct value. * Incorrect float voltage: Adjust the float voltage to the correct value. * Defective internal DC fuse: The inverter is damaged.
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jeremy81Aug 17, 2025
Why is the alarm LED flashing on my Victron energy Phoenix Multi Compact 12 800 35?
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  Kim BaileyAug 17, 2025
  The alarm LED may flash due to several reasons: * Low DC input voltage: Charge the battery or check the battery connections. * High ambient temperature: Place the inverter in a cool, well-ventilated room or reduce the load. * Overload: Reduce the load on the inverter. * Excessive voltage ripple: Check the battery cables and terminals, and increase battery capacity if needed. * Low battery voltage and excessive load: Charge the batteries, reduce the load, install higher capacity batteries, or use shorter/thicker battery cables.
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abaileyAug 22, 2025
What to do if my Victron energy Phoenix Multi Compact 12 800 35 Battery Charger is not functioning?
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  Eric BarkerAug 23, 2025
  If your charger isn't working, it could be due to: * AC input voltage or frequency being out of range: Ensure the input voltage is between 185 Vac and 265 Vac, and the frequency matches the setting. * Tripped thermal circuit breaker: Reset the 30 A thermal circuit breaker.
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Mr. Keith HernandezAug 28, 2025
Why is my Victron energy Phoenix Multi Compact 12 800 35 Battery Charger overcharging the battery?
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  Kayla PierceAug 29, 2025
  An overcharged battery can result from: * Incorrect absorption voltage: Adjust the absorption voltage to the correct value. * Incorrect float voltage: Adjust the float voltage to the correct value. * Defective battery: Replace the battery. * Battery too small: Reduce the charging current or use a battery with a higher capacity. * Battery too hot: Connect a temperature sensor.
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Stacey WilliamsSep 4, 2025
Why does the charge current drop to 0 when absorption voltage is reached on my Victron energy Battery Charger?
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  Deborah WalkerSep 4, 2025
  The charge current might drop to 0 when the absorption voltage is reached due to: * Battery overtemperature (greater than 50°C): Allow the battery to cool down by placing it in a cooler environment and check for shorted cells. * Faulty battery temperature sensor: Unplug the battery temperature sensor from the Multi. Reset the Multi by switching it off, waiting 4 seconds, and then switching it back on. If the Multi now charges normally, the battery temperature sensor is faulty and needs replacement.