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sijtze-de-boer avatar image
sijtze-de-boer asked

Different voltage between VRM and battery

I have connected the power of a Venus GX on a service battery and also a multiplus. Now I see on the VRM Website (monitor) a voltage of 9.6 Volt but my service battery has 12.5 Volt. Why is there a difference between the VRM monitor and the real voltage of the service battery?

VRMVenus GX - VGXbattery system voltage
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seb71 avatar image seb71 commented ·

What is the voltage (measured with a multimeter) at the Multiplus battery wires connectors?

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sijtze-de-boer answered ·

On the Multiplus battery wires connectors the same as on the battery at this moment 12.55 Volt.

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seb71 answered ·

In Venus GX, if you go to "Settings" and then "System Setup", what you have set for "Battery monitor"?


And do you have DVCC enabled?

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sijtze-de-boer avatar image sijtze-de-boer commented ·

Battery monitor -> automatic

DVCC -> disabled

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seb71 avatar image seb71 sijtze-de-boer commented ·

You only have the Multiplus and Venus GX, right?

What kind of battery do you have? Lead-acid, LiFePO4 (and if yes, what BMS, if any)?


Edit

Also list the Venus GX and Multiplus firmware versions.

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sijtze-de-boer avatar image sijtze-de-boer seb71 commented ·

Yes only Multiplus 12/3000/120 and Venus GX with GSM and GPS.

AGM battery no BMS at this moment.

I have a BMV 712 but not connected yet.

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sijtze-de-boer answered ·

After firmware upgrade to 2609481 and connecting BMV monitor on the Venus GX everything works very nice.

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Related Resources

Venus GX manual

Venus GX product page

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