2014 BEV Giga model. This morning I parked my car after dropping off kids to school (2 mile round trip) with about 80% battery level left. When I got into the car 4 hours later, the battery level is at 68%. The weather is around 40 degree F and I drove with Eco Pro + unless weather dropped to freezing. No pre-heat or "Climatize Now" operation either, as far as I know. I did not have any headlights on either, just the DRL while car is being driven. Anyone notice the battery level self adjust this way and this much?
I also noticed a while back sitting at traffic light that the battery level would drop in 1% increment for a total of about 3% just sitting at the light (<1min). Again, Eco Pro + and no climate control was being used. I was not using the brake to keep the car still at that moment since it is stopped by itself at a relatively level road, may be a little incline up. I was thinking may be the motor was actually using electricity to keep the car from sliding back.
It is kind of big deal in planning trip since the GOM now only estimate 50 miles of range for comfort mode and 60 for ecopro+. Every mile counts, compare to 4 years ago when the GOM estimate of 80 miles for comfort and 90 for ecopro+.