Today is my first time charging to 100%. I'm not getting the 386km as advertised. I'm only getting 378km. Is that supposed to be normal?
Charging at super charger. And the last 5 minutes actually took more than 20 minutes. I didn't wanna wait for 100%, so I leave after waiting for 25 minutes of "time remaining: 5 minutes"
It's not normal to get 378 if 386 is advertised on a relatively new delivered car. There's an issue in the individual battery quality or something wrong around the battery. I had same issue. Tesla tried many "techniques" to confuse me. I have a long range model 3 rated at 499 but never be able to charge to 486 after the 2nd week of the delivery.
Technique 1 (the most popular): the range at 100% changes depends on the driving habit and driving condition. If you drive conservatively for instance reducing the heater/ac, you could have longer range. This is a wrong statement. The range charged to 100% is called by Tesla "ideal (rated) range" which has nothing to do with the driving range. "Rated range" is the indicator of the battery capacity aka gas tank size if ICE car. The size of gas tank doesn't change dramatically.
Technique 2: if you do a battery calibration by running down to 5% and charge to 100%, the rated range will go up because battery management software can self fix it. From the forum, this technique works for some owners but not for all. It didn't work on mine.
Technique 3: your rated range meets Tesla's battery quality standards. When I asked the standards, Tesla won't tell me.
Technique 4: range at 100% fluctuates according to the weather temperature. This is in general correct, just like in ICE car, the physical amount of gas I can get into the tank fluctuates according to the weather. The gas station adjusts the gas cost accordingly as well. However, the rate of battery capacity reduction should be consistent from car to car.
My battery capacity seems worse than the average by about 10km. It's not that a big deal; I would accept this just like accepting the uneven glass panel gap.