E70 Increased Battery Discharge while Stationary

[RRE70]

Originally Posted by JCL

For those interested, here is BMW's Energy Management Strategy for the E70, dating back a few years.

http://www.bmwmotorsports.org/pdf/e7...Management.pdf

Executive Summary: Penguin's Explorer, referenced above, had a voltage regulator that read battery voltage, and decided whether to charge the battery or not. Worked pretty darn well. OTOH, the above document takes 35 pages to explain when the alternator should be charging the E70, or not.

Great info JCL, thanks.
I am going to really get into this, talk to the BMW techs and get back at the forum.

[2007X5]

Has anyone replaced their 180 amp alternator with the 220 amp alternator to see if this solves the problem? Is this a bolt in swap? Do you need a different belt?

Thanks for any info.
Mike

[GPSnV1]

I am starting to see the message "increased battery discharge" with my 2012 X5 that has less than 12K miles. Disappointing.