Submitted by ks-man on Mon, 2014-07-07 04:49
I've been reading a few of the threads and am still confused about what Rated Range is supposed to show and what I'm seeing.
Yesterday I left a Supercharger with a rated range of 201. My understanding is that rated range is using a simple 308 wh/mi calculation so assuming I drive exactly 308 wh/mi I should be able to achieve the 201 miles my range is showing me.
It just so happened that as I got close to home my wh/mi was at 308 (it bumped up to 309 in the garage) on the line that said "Since Last Charge". I had driven 135 miles from the supercharger (again measured on the Since Last Charge) however my range was showing only 51 miles left. So essentially if I add the two up I would have 186 miles or I lost 16 miles of range despite going exactly the rated range as an average for the trip. We did not make any stops between leaving the supercharger and getting home.
Can somebody explain to me what is going on here? It doesn't even make sense that the formula dropped to 300 for the rated range as that would simply mean that I used another 1,080 watts for the trip (8*135) and I wouldn't use up 15 miles for 1kWh.
Are other people seeing this? Do I need to take it in to be checked? I see this to a smaller scale all the time for my regular drive where my driven miles plus range remaining has lost a few miles from my initial rated range. Thanks.