Must Power PV3500 PRO Series

Questions and Answers

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Joseph JohnsonAug 15, 2025
Why is Must Power PV3500 PRO Inverter working in battery mode when mains exist?
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  gary21Aug 15, 2025
  If your Must Power Inverter is working in battery mode even when mains exist, it could be due to a tripped input protector. Check if the AC breaker is tripped and ensure the AC wiring is properly connected. Alternatively, the quality of the AC power from the shore or generator might be insufficient. In this case, check if the AC wires are too thin or too long. If using a generator, verify that it is working correctly and that the input voltage range setting is correct (set to 'Appliance=>wide').
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Melinda ByrdAug 20, 2025
How to fix Must Power PV3500 PRO Inverter shutting down during startup?
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  Elizabeth MooneyAug 20, 2025
  If the Must Power Inverter shuts down automatically during the startup process, it is likely that the battery voltage is too low (less than 1.91V/Cell). To resolve this, you can try to recharge the battery. If the issue persists, consider replacing the battery.
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Jason WebbAug 27, 2025
What to do if Must Power Inverter has no response after power on?
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  Helen GibbsAug 27, 2025
  If the Must Power Inverter has no response after you power it on, there are several potential causes: * The battery voltage may be far too low (less than 1.4V/Cell). In this case, check the wiring connections of the batteries to ensure they are properly connected. * The battery polarity might be reversed. If so, recharge the battery. * The input protector may be tripped. If so, replace the battery.
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Brian SimsSep 2, 2025
Why is Must Power Inverter relay switching on and off repeatedly?
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  James SanfordSep 2, 2025
  If the internal relay of the Must Power Inverter is repeatedly switching on and off when the unit is turned on, it is likely that the battery is disconnected. Check the battery wires to ensure they are properly connected.
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Ronald PatelNov 8, 2025
What to do if Must Power Inverter buzzer beeps continuously?
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  Chelsea BrooksNov 8, 2025
  If the Must Power Inverter beeps continuously and the red LED is on, several issues could be the cause: * The inverter may be overloaded (over 110%). Try reducing the load by turning off some equipment. * There might be a short circuit in the output. Check the wiring and remove any unusual loads. * The internal temperature of the inverter might be too high (over 90°C). Ensure that the unit's airflow is not blocked and that the ambient temperature is not too high. * The battery voltage might be too high. Verify that the battery specifications and quantity meet the requirements. In some cases, like fan fault, over-charged battery, internal components failure, over current or surge, unbalanced output voltage, low bus voltage, or a battery connection issue, it may be necessary to ret...