Rather than ask a hyper specific question for my exact situation, how should everyone pad their required range for the primary purpose of their Aptera?
I know ideal battery usage is 20-80% either direction, and higher speeds use more power while cold temps reduce cell capacity, but about how much buffer should be added for each?
I have a 120 mile round trip commute, 2/3rds of it freeway at 70-80 mph, with temps ranging from <30 to >110 depending on the season. I also happen to descend 2K ft to work and climb 2K feet on the way home...
So I basically have all the complications for range calculation... I could of course just get the biggest battery available, but if largess was my game, why would I be on this forum?
The other factor that I don't see others have mentioned is how much you want to constrain your SOC (state of charge) range of use in order to extend the life of your traction battery.
While manufacturers seem to be getting away from this, early assertions of EV range were based on going from 100% to 0% SOC; a sure way to kill a battery way before its time. It is not clear where Aptera is in this regard, but I'm inclined to think that they are claiming the extreme value.😐 Of course those are pretty huge range values so...
My understanding is that a standard charge cycle for cycle life testing is from 100% to 20%, and then back to 100%. If the warranted cycle life of the battery pack is good enough for you, then you will want to assume 20% less range than the absolute maximum range that may be asserted and use that for your practical range.
Even then, more than 80% of that standard cycle life battery wear occurs between 100 and 80% SOC and also between 20 and 30% SOC so theoretically you could coax a battery pack into lasting something like 5 times as many charge cycles as advertised if you kept that SOC in that 50% (30%-80%) mid-range.