Solar Inverter Low Voltage Warning/Shutdown

  • I have the 1500W Off Grid Pure Sine Wave Inverter and have a quesiton concerning low-voltage shutdown.

    I am going to be out of town for most of the day and won't be back until after dark.  My solar will run all day and power my house but will not last through the evening (after sundown) and into the night.  Once the voltage drops low enough, my inverter starts beeping with the low-voltage warning and eventually the power inside shuts off.  The low-voltage warning continues until I actually shut off the inverter.

    My question is this....

    Once the power automatically shuts down in my house and is no longer drawing off of my battery bank, if the inverter's On/Off switch is not physically turned off and the low-voltage warning keeps beeping, will this continue to drain my battery bank until the inverter switch is turned off?  I just don't want to damage my battery bank or my inverter by letting the warning signal continue to go off.  I am not using LifePO batteries, just sealed lead deep cycle batteries.


    Thanks for any help!


  • Hello Joshua,

    I would say the short answer to your question is yes, there will continue to be a small drain on the batteries as long as the inverter power is on.  I dont know how much of a drain that would be, that would depend on the particular inverter you have.

    Every inverter will draw a small amount of power from the batteries when the inverter power is turned on, even when there is no AC load at all.  I dont know what that is for the 1500W inverter that you have, but it is probably around 1.5 amps or so.

    I dont believe there is any danger of damaging the inverter if it continues to beep.

    How old are your lead acid batteries?  And do you have an idea how much power your house uses from the solar system?  Are you OK with the system shutting down after the sun goes down?  How long after the sun goes down does it take before the inverter shuts down?

    Regards, Ron

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