Well, I decided, after a break of several years, to check again what might be the best way to judge range near turtle. The reason is, about twice yearly I make a trip and have less than I anticipated near home (I.e. below VLBW and usually no fuel bars showing). It's important to me because, typically, it is at the end of the day, I'm tired, and even though there are numerous charge stations within a few miles of my home, I would MUCH rather make it home, relax and charge at home, than stop and spend 30-60 minutes charging when near home (no fast charge port). I have a 2013 S that has lost one bar.
A few months after buying the car in 2013, I purposefully ran the car down to turtle, taking numerous measurements the last couple of miles. Result at that time, distance to turtle seemed to be best estimated in the 0-5mile range, by looking at the minimum cell voltage. Then turtle seemed to occur very close to 3.00 volts.
Leaf Spy has a handy, adjustable, range guesstimator, which can be set to 0.5KWH (0.1KWH above turtle). Well that didn't work so well on today's test. I drove 5.8 miles from when LeafSpy reported 0.5KWH until it changed to 0.4KWH (turtle).... Hmm 5.8 miles on 0.1KWH, I think not (I was driving around the block near my home at 20-25mph, dash efficiency read 4.9-5.1mi/KWH).
I (stupidly) did not note GIDS, but did record LeafSpy SOC, which showed 7.8% when I hit 0.5KWH remaining, and gradually decreased to 4.8% at turtle. I also noted the minimum cell voltage, which matched very closely to the results I got when the car was near new. About 3.30V=2.5mi remaining until turtle, 3.20V=1.4mi remaining, 3.10V=0.8mi, and turtle at 3.01V.
Seems like either minimum cell voltage or LeafSpy SOC gives better info than the LeafSpy guesstimator using 0.5KWH remaining.
So, this post is both an FYI for those that drive below VLBW and want to know will they really make it home or not...
And two Queries, what is the most accurate way to estimate range when near turtle (is GIDS better than SOC or min cell voltage); AND Why did the car go 5.8miles on a reportedly only 0.1 KWH energy????
2 LEAFS, bought 1 week apart. 2013 S for me, 2013 SV is wife's. Both manufactured May 2013. I lost first bar at 36,000. Wife still has all bars at 50,000.