Thread: X2 M35i Battery
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      09-03-2020, 11:53 AM   #32
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Drives: 2020 X2 M35i, 2005 Volvo V50T5
Join Date: Sep 2019
Location: Eastern Massachusetts

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Quote:
Originally Posted by rice_rocket88 View Post
Ouch, I guess my daily commute is about 50 miles so it tops up pretty fast.
Don't assume it's charging the battery just because the engine is running. The system actually de-energizes the alternator to save power.

Watch the little efficiency gauge at the lower right of the instrument - when the blue bars are showing, it's in regen mode. The system engages the torque converter and uses the car's momentum to drive the crankshaft while it re-energizes the alternator. In many other situations, it's only putting out a maintenance charge.

In Eco mode, it's even more extreme.
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