After about a year at 298Wh/mi on my P85, today I finally had it fall to 297Wh/mi. 40,500 miles. I've been patiently waiting and I found it much more exciting than is reasonable.
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I think much of it has to do with climate. I bet you rarely have to run the heat or the pack heater. Both of those are significantly more crushing than AC use. Another factor is hills. While regen recovers downhill to some degree, it's lossy - somewhere around 20% losses. And of course wheels and driving contribute.287 here lifetime on a S75. I’m not considered a slow driver. I don’t Know how you guys at 300+ keep your licenses.
Used to live in Kona. Nothing but mountain driving. The 287 was for that. I’m currently averaging about 270 here.
100 kg doesn't make much difference one way or the other.I wonder if your car is a couple hundred pounds lighter too since you don’t have a glass roof or big wheels, maybe springs too...