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#14
08-02-2023, 09:30 AM
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On my recent 850 mile drive I was curious about the alternator charging program so I pulled up voltage display on bimmerlink.
Going through the mountains I noticed the voltage drop to ≈ 12.3 going up hills and 14.8 when going down hills. I think the IBS aims to keep the battery at about 80% charge so it always has room to take charge while coasting. I do wonder how often it charges when driving over a completely level road. https://bimmerscan.com/bmw-intellige...ry-sensor-ibs/
__________________
2011 E70 • N55 (me) 2012 E70 • N63 (wife) 
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