We took a weekend trip from Austin to College Station, and I don't understand some of the trip information from the car.

We started with a 100% battery and I reset Trip 2 before we left. When I came back it said we had gone 252 miles and an efficiency of 2.5 miles/kWh. Doing that math, does that not mean this trip used 100% of a 102kWh battery?

We left at 100%. Upon arrival I was able to add 8% at an L2 charger in a parking garage. I tried to charge again at a SuperCharger but failed (first time I've had a problem with a SuperCharger, concerning). We got back home with 20%. So, remove that 8% and we used 88% of the battery. This equates to 2.87 mi/kWh, not 2.5.

What gives?

For those not familiar with driving in rural Texas like this, much of the trip was at 75mph. It was windy. Frequent speed drops in small towns. However I was driving in a very reserved manner, trying to be energy efficient.

 

The battery pack can store more energy than the official 102kW number, somewhere between the high 100 and low 110 range.

 

Thanks for that info. A friend was also wondering if regeneration energy was responsible for the difference. As in, the trip consumed 100kWh of energy, with 88 of it coming from the battery and the other 12 coming from regeneration. But your idea could be right as well.

 

The kWh average does not include regenerated power. You can see those details in Vehicle Status > Energy Efficiency. Annoyingly the regenerated figure is in miles, not mi/kWh. You can see the actual energy used on the Vehicle Status > Energy Usage screen.