On a road trip yesterday, I noticed that I used 248 rated miles to travel 242 actual miles, and yet my average energy consumption was 283 wh/m. I always thought that rated miles would be less than actual miles so long as average consumption was less than 308 wh/m.
When I checked the car this morning after an overnight standard charge, I saw that my rated miles was 248, higher than it has ever been for a standard charge (it may have even been higher, since the charge was completed around midnight, and the car likely lost a couple of miles after that).
And then I remembered: software version 4.3 was installed two days ago. Not only does version 4.3 implement timed charging, but it apparently fixes a problem with the way rated miles are reported after the battery has become cold.
I'm wondering whether we can still rely on our assumption about a rated mile equaling 308 watt-hours? Is it possible that software version 4.3 modified that definition? For my recent road trip, a rated mile was somewhere between 273 and 282 watt-hours. It is also possible that a rated mile varies with battery temperature and other conditions. Has anyone else noticed a change, either in your average consumption or in the number of rated miles you are seeing after a standard charge?
Any ideas from our engineering friends?
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