Data point. On TMC forum there are threads for people to post their 90% numbers so I had numbers there.
Mar 3rd 2016
is when I got my P90D X. Supercharged to 90% showed 224 mi
(224/9*10=248.88 @ ~100%). The P90D is rated for 250.
Mar 24th 2017
: My P90D is at 28.3K miles and at just over 1 yr I am at 213.3 Miles
@ 90% (213.3/9*10=236.6 @ ~100%)
So 213.3/224 = 95.2%
-- This is what I expected based on all the Model S history and various charts. Earlier loss then level off. Hoping to upgrade to a larger battery in several years for more detoured drives and rural America. i.e. picking up my son from college is 100 miles each way from a supercharger. Not ideal at winter break w/less range avail
Obviously I use Superchargers a fair amount. I mainly use them to charge just enough plus 10-15% buffer to get to the next one (i.e. what car's trip planner suggest). I occasionally use them to charge to 98-100% for some special cases/destinations. I leave the house with 100% on the first days travel and use an Android app to get it to that point fairly close to when I'm leaving. I originally charges to 90% daily but in last 6 months only do 80% daily.
Aside: I am currently over 29K and will be traveling back to SD for Tesla car meetup in May then on to MT.
Volts: We still have our 2011 Volt but my college son drives it when he gets home. My wife's 2016 Volt gets < 500 miles per month on it.