A member of our local Tesla group got this mail from Tesla.
I am reaching out today in regards to your upcoming appointment with Tesla Service. I work with Tesla's Virtual Diagnostic Team in which our goal is to proactively pre-diagnose your vehicle prior to your service appointment and order any parts if needed in an effort to make your service experience as fast and as seamless as possible. We have already started work on your vehicle remotely. I am currently reviewing your service visit scheduled in Tysons Corner for 12/##/2019 at 2:00pm
Regarding your concern: “My total range is 305, why has it dropped after a full charge”.
· First, I want you to rest assured that your HV battery pack is happy and healthy.
· Comprehensive remote diagnostics results in no hardware issues to address.
· Your battery capacity tests are that your pack is 0.1% HIGHER than the avg of similar configured vehicles.
· Driving higher than the normal EPA rated consumption rate, lower ambient temperatures and charging habits affect projected miles calculation, not actual battery capacity.
I have done comprehensive remote diagnostics on your vehicle. High voltage system remote diagnostics returns no hardware issues on your vehicle that needs to be addressed. I have compared your vehicles ability to store energy as compared to all other long range rear wheel drive Model 3s and your vehicle’s energy storage capacity is slightly above the average of the fleet. Your vehicle displays no alerts indicating hardware issues. This shows that the battery is retaining energy properly.
I have reviewed the energy consumption of your vehicle and the consumption rate over the last 30 miles is 284.4 Watt Hours per Mile which is what the vehicle actually uses for projected miles calculations. When EPA set the range and consumption standards for your configuration vehicle they rated the consumption at 234.0 Wh/mi during testing. The effect of operating at higher than the rated consumption is that projected miles will decrease faster than actual miles driven and also cause projected miles to be under calculated slightly. You can monitor rated, average, and live energy consumption numbers on your energy graph of your center display. This is one factor in why your projected range will show lower than expected.