Two helpful articles on regenerative brake design and 48V system. The last link is a G20 forum post by a BMW research employee, he tried to clarify some misunderstandings. I was unable dig out any meaningful info on the TIS site.
https://www.brakeandfrontend.com/reg...aking-service/
https://www.greencarcongress.com/202...7-5series.html
https://g20.bimmerpost.com/forums/sh...7#post26311167
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2021 X5, Excellence, M Sport, DHP, DAP, RSE, MW, Merino.