Different battery voltage readings

megamac

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• Feb 18, 2025

• #1

Anyone else seeing the difference between the 14V battery reading on the dashboard and within the app? Any idea which one is right and what the expected reading should be? 13.8V on the dashboard and 14.4 on the app!?!

 

Eclectic

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• Feb 18, 2025

• #2

I would guess that the car was reading the voltage when the battery wasn't being charged, and the app was reading it when it was!

 

megamac

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• Feb 18, 2025

• #3

Thanks, but I snapped the photos at the same time and had just done a refresh on the app.

 

T

Tim Green

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• Feb 18, 2025

• #4

It could be the voltages are being measured at different points. If the lower voltage is measured near a load taking 1amp, it only needs the connecting wire to have a resistance of 0.5 ohm to give that reading.

 

megamac

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• Feb 19, 2025

• #5

Thanks. What I have noticed is that the car dashboard almost always shows 13.8V for the battery.