Inquiring as to how I calibrate my BMV712. I have a 150ah lithium, Victron MPPT and recently Replaced Orion TR DcDc (not fitted back as yet). My BMV is showing 53% SOC with 94 amps used. My solar seems to charge only when under load (fridge) and my Blues art charger goes straight to storage mode whe…

Ignore soc for now. It could be incorrect. Is the battery at the target voltage programmed when charged? On face vakue it seems like you may need to review settings. [image] Ludo: And ofc you have only one wire connected between battery mi us and shunt And also make sure it is connected co…

[Screenshot_20250409_072912] [Screenshot_20250409_073035]

Thank you. The system was installed by a 12v tech but he lives a long way a way and hard to get hold of. Also of note is that the system worked fine for 2 years before the dcdc charger started playing up.

BMV has some wrong settings that really will affect its accuracy, change the following Charged voltage 14.0V Peukert exponent 1.05 Charged efficiency 99% Then make sure the batteries get up to a full charge voltage of 14.2V and current falls to below 6Aso they are full AND the BMV synchronises t…

[Screenshot_20250409_083500] New settings. Where can you see the battery is Lead Acid? I can only see Lithium in my settings.

Settings for DcDc charger just connected (it was faulty and Victron sent me a new one) which I’ve just hooked up [Screenshot_20250409_084105] [Screenshot_20250409_084113] [Screenshot_20250409_084119]

There is no lithium / lead acid settings, the choice of Peukert at 1.25 and charge efficiency at 95% were the values to use for lead acid, I gave you the values for lithium. The manual explains all this.

Thanks for your input. After those changes, everything seems to be working fine. Once the Aux battery hit 14v the SOC jumped to 100%. Hopefully this is all good. [Screenshot_20250409_161621]

Thank you for your input. It’s very much appreciated and system looks to be back on track and working correctly.

Keep an eye on it over the coming cycles and see how it goes.

Calibrating BMV712

DIY

lxonline (LX) 8 April 2025 16:19 3

Ignore soc for now. It could be incorrect.

Is the battery at the target voltage programmed when charged?

On face vakue it seems like you may need to review settings.

And also make sure it is connected correctly.

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Calibrating BMV712

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