[Sigtran]

Issue is that battery is not kept at 70-80%, but 12.3V is ~50% SoC... And sometimes is just 12.2AV. All that now at +20C outside temp. In month or two it shall be -10C, sometimes even -15C in the morning, will the car start if such low SoC is kept by "inteligent battery management"?

"The intelligent alternator control is suppressed cyclically in order to allow 100% battery charge to maintain the full capacity of the battery over time (regeneration)."???

I have never seen above 12.4V (after night sleep) even after 800km day trip. Does anyone ever get more?

By contast, my wife car (not BMW), is typically at ~12.7V (similar age battery, also AGM - healthy 100%, measured full rated CCA, similar internalR). My daily trip to work is at least 1hr (~35km round trip through rush hours), and of my wife is even less.

BTW this battery tester is fully aware battery is AGM type (selected on battery test start) and not a regular type.