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ibbrian avatar image
ibbrian asked

Multiplus II shutting down at 11.4 volts

Discovered a new issue. My low level setting for inverter is set for 10.5 volts, but is shutting down at 11.4? My victron shunt is reading 11.4 volt @ 75% battery and shuts down. Help!

low battery warning
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1 Answer
Alexandra avatar image
Alexandra answered ·

@Ibbrian

11.4v is definitely not 75% SOC.

What you might find is underload the battery voltage is lower.

Are you using ESS at all?

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ibbrian avatar image ibbrian commented ·

This is happen during dry camping and a compressor was plugged into RV at about 2:00am. The inverter would not turn back on even when victron battery shunt displayed 11.4 volts.


As far as ESS, I have 700 watt solar on top of RV used with victron MTTP charge controller. Battery bank is (4) 100ah 12 volt lithium batteries.


Also, after I turned ff the compressor, my shunt was reading 11.4 volts-that would be with virtually no load.


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kevgermany avatar image kevgermany ♦♦ ibbrian commented ·
Good chance the BMS shut the battery down.

ESS isn't intended for mobile use.


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Alexandra avatar image Alexandra ♦ kevgermany ♦♦ commented ·
Under load a battery voltage drops.

What is the restart value programmed onto the inverter?

You will still need to address the SOC issue. Do you have a shunt?


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ibbrian avatar image ibbrian Alexandra ♦ commented ·

Inverter is set to turn off at 10.5vdc.

Yes, I have a shunt installed

I feel I have answered these questions in my original post. If not, please elaborate.


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Alexandra avatar image Alexandra ♦ ibbrian commented ·

I read the system turned off at 10.5v I was asking what it is programmed to do. Expecially the restart value.

And that at 11.5v the battery cannot possibly be at 75% SOC.

What batteries do you have lithium or lead acid?

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ibbrian avatar image ibbrian Alexandra ♦ commented ·
Ok, sorry. It is programmed to shut inverter off at 10.5v. Will restart inverter, or " turn on" , at 11.5volts


I have lithium batteries.



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ibbrian avatar image ibbrian kevgermany ♦♦ commented ·
I don't have an ESS per se, I just have house battery bank and solar with mttp controller for my RV.
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