Hello!
I just bought a P3D and thought it would be interesting to track the vampire drain. The car has 250 miles and is parked in a well insulated garage in San Francisco (average temperature about 65°).
I was on a business trip for 12 days and the car was parked in my garage during that period. I did not check the app and only reported the charging status using the app notifications and later on using the data from my utility provider.
The car was set to maintain a charge of 76% and start charging every day at 11pm. Usually the car was waiting to loose about 2% to start topping it up. On one occasion it did not and waited 71% to start topping it up again.
On average, I lost about 1% per day (3 miles?) and required a total of 111 minutes of charge to maintain battery level over 12 days. All together, the Model 3 pulled 11.76KW from the grid (reported by my utility provider), which represents an average of 0.98KW per day.
In California, with my SuperGreen plan, I pay about $0.14 per KW so that would be a cost of about $4.11 per month.
What do you think of those numbers?
Data:
Model 3 Vampire Drain