Right, exactly. The gains in efficiency and the fact that once charged, your car/computer will "sleep" to calibrate BMS stuff. It seems like you should really rush to get your charge filled up, or at least to a pre-set point, and then do it again in the morning to get the battery warmed for driving.
Example of what I mean: I drive 80 miles a day, which represents about 20 kWh battery usage at a 250 Watts per mile efficiency.
My preference is to set it to 70% SOC for daily routine driving. This brings me down to 50% when I arrive home in the evening. I'd like to have it charge to 60% immediately, and then go to sleep. Then, in the morning or in an hour or so before I plan on driving, start charging up to my target of 70% for the next day's usage. This gives it an opportunity to sleep, warm the pack before I drive it in the morning, and calibrate.
You'd obviously have to figure out the magic number based off your driving habits... But, a 240V@40A 14-50 outlet would provide 9.6 kW before any efficiency or overhead losses. Even if we dropped this down to 9.0 kW, that's still a lot of energy, enough to provide around 9*4=36 miles of range at a 250 Watts per mile efficiency.
Maybe in the future Tesla will give us the fine-tuning to set the daily charges to 5% increments.
Example of what I mean: I drive 80 miles a day, which represents about 20 kWh battery usage at a 250 Watts per mile efficiency.
My preference is to set it to 70% SOC for daily routine driving. This brings me down to 50% when I arrive home in the evening. I'd like to have it charge to 60% immediately, and then go to sleep. Then, in the morning or in an hour or so before I plan on driving, start charging up to my target of 70% for the next day's usage. This gives it an opportunity to sleep, warm the pack before I drive it in the morning, and calibrate.
You'd obviously have to figure out the magic number based off your driving habits... But, a 240V@40A 14-50 outlet would provide 9.6 kW before any efficiency or overhead losses. Even if we dropped this down to 9.0 kW, that's still a lot of energy, enough to provide around 9*4=36 miles of range at a 250 Watts per mile efficiency.
Maybe in the future Tesla will give us the fine-tuning to set the daily charges to 5% increments.