Not sure about the F30 but this is reality on the F10 ...... alternator is disengaged when accelerating or there is a load on the engine!
Originally Posted by DSXMachina
there is thought of putting a clutch on it so it presents no load when the battery is fully charged
But new batteries are only $500 - $550 for the F10
"sometimes you're the windshield .... sometimes you're the bug"
2014 328i Mojave Metallic
2009 328i Black Sapphire Metallic
2007 328i Black Sapphire Metallic
2007 Honda S2000 Berlina Black
(Hey Jim... am I diversified?)