Reviving a little old thread. But I have been noticing these issues as well. I was wondering if there was any conclusion on any of this. I also am only seeing ~224 miles on a 90% charge every morning. These two things combined have me a little concerned about getting to SC for Thanksgiving this year. I drive a S85.
I left for work today with 224 miles 'rated range' on the dash.
I drove almost exactly 30 miles to work and ended up with 194 miles 'rated range' on the dash.
The REST API is reporting 194.3 'rated range' (via AHimberg's WindowsPhone App).
My display on the dash also says 266 Wh/mi.
My 17" display says I have 223 miles 'projected range'.
My 17" display says I have 264 Wh/mi over the last 30 miles.
It was a nice cool, if not a little chilly, 60F this morning on my drive to work.
When I was driving to work I was generally between 260 and 280 Wh/mi the whole second half of the trip. And my rated miles were dropping pretty much in lockstep with my actual miles driven. They were never more than one mile off.
I have read this thread again today. It seems that I should be banking (versus actual miles driven) rated range, with a 266 Wh/mi energy consumption.
My concerns are two fold. One I was expecting that at such low power consumption that I could beat rated range (if only barely). And that my rated range is significantly reduced from the ~238 it should be at (90% of 265) on a daily basis. And that my one way trip is 320 miles to where I need to go in SC (I plan on charging about 220 miles into the trip, and have another closer charge point if necessary).
Now this being said about a month ago I drove 222 miles, using 65.4kWh, averaging 295Wh/mi. I had 29 'rated range' remaining at the end of the day. On that trip I dropped an additional 10 miles of 'rated range' in the first 7 of driving (lost 17 miles total, my average at that point was ~400 Wh/mi though). And I lost another 8 parked (only for about 2 hours) at destinations. And I was able to recover some while driving conservatively at stretches. I don't remember what my starting 'rated range' was. I think it was ~262 miles. It was a good 95F this day. I didn't have any worries (except after parking and seeing the 8 mile drop, I went easy for about 20 miles before I kicked my driving back up to ~70mph).
So my questions:
Does the top of the battery read 'rated range' loss faster than the bottom?
Is this inline with some of the behavior that you are seeing?
Is it reasonable to expect higher than initial 'rated range', if you are able to drive in the 260 Wh/mi range?
Based on my long trip it looks as if I could use about 75kWh, is it reasonable to expect that I could drive 320 miles on that if I was averaging 231 Wh/mi?
All of this would go away if there was a Supercharger in Augusta (are you listening Tesla?). I could care less as long as I could go ~250 miles (on a 100% charge) without much thought (or significantly low highway speeds).
EDIT: I am aware of this thread:
http://www.teslamotorsclub.com/showthread.php/18189-You-might-consider-charging-slower so I will try to get a cosmetically larger number, for comfort before I embark on my trip to SC for Thanksgiving.