Use the calendar with location addresses to automatically adjust the maximum charge. If no trips or only local trips, it might set the charge to 80%. When an event like long-distance travel is planned for the next day, it would set the charge to what is needed or perhaps 100%.
Once and a while I run some additional errands. Maybe I head off to a meeting or visit a friend. All of my meetings and travel are well-documented in my Google Calendar, which my Model S clearly knows about…
Adjust the nightly charge capacity when my schedule clearly shows I’ll need a bit more juice for the coming day’s travel needs.
As a follow-up suggestion, if the ‘car’ was truly analyzing my ‘calendar,’ it could also make ‘recommendations’ for a target daily charge capacity based on the average of the last 90-days of use.
Moderator: The calendar is only updated when you get into the car. If you do not use your car every day, it might not have an up-to-date calendar. Perhaps Tesla could connect to an owner’s calendar another way, but there are so many incompatible calendar formats, this may prove very difficult.
Update 2: With Teslas offering more and more range, the need becomes far less.