Tamás, the reference voltage is meant to follow battery degradation and environmental thermal conditions, it's currently taken after a 12V charge cycle, with some calmdown time taken into account. To do that, it relies on the `ms_v_env_charging12v` signal. If that is broken, it won't work properly -- and your chart seems to show that: the reference has been taken while the 12V charge was still running. Looking at the 12V chart for my Mii, there apparently is room for improvements regarding very short driving periods, but on regular 12V charge cycles it works as designed: So I suggest taking a look at improving the `ms_v_env_charging12v` detection on your car. Regards, Michael Am 22.12.24 um 10:45 schrieb Tamás Kovács via OvmsDev:

Can anybody explain, why changing the 12v reference voltage, or is that good? I get some battery notification because this. Hyundai ioniq 28 kWh. Screenshot 2024-12-22 at 9.14.09.png (490 KB) <https://mail.google.com/mail/u/0?ui=2&ik=b954432353&attid=0.1&permmsgid=msg-a:r6748997389650639300&view=att&disp=safe&realattid=f_m4zf8qem0&zw> -- Best regards: Tamás Kovács

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