All the talk about battery thresholds most defiantly makes sense. These talks are fascinating to me, so thank you for sharing.
There have been numerous times when I have run the FFE to 0% SOC, to the point of no ability for the FFE to drive further. I turned the car off for 10-20 minutes, then magically been able to move a bit further. Most likely due to the pack balancing and thresholds mentioned above.
Sadly, I do not have the time to invest in attempting the 72-hour rebalance since I only have 14 days or so left on my CarMax return window. I don't want to be stuck with a lemon and need to return it if it is not functioning correctly. Although, I do believe the cell voltages in this particular FFE could use rebalancing to get the FFE to more normal operating parameters. I am surprised there isn't a yellow wrench trip for when the cells get so far out of balance. Or, maybe there is, and it is not functioning correctly in this particular FFE? Either way, this FFE needs more attention than I can afford at this present time.
Luckily, I will return the car to CarMax in Palm Springs this Friday. I found another 2017 FFE that hopefully has more usable watts—keeping my fingers crossed. I like the focus a lot, especially the FFE. I wish I could afford the Mach-E