It’s stuck at full since the end of August. This is also when they installed a work charger, just recently. Since then I’ve been driving to and from work, doing occasional shopping, and some local trips. But that gauge is still showing a full tank. What should I do...
I would take it back to the dealer and raise a ruckus. There just has to be something wrong with it. Mine was stuck at 9/10th's without budging since December of last year. Then I drove it to Maine and back a couple weeks ago, and that seemed to have fixed the problem. I'm not sure what I did, but it has been much lower and/or much higher since.
On a serious note, a coworker, and hundreds of others, got stranded on the side of the road when they ran out of fuel. Gas contaminated with too high sulfur had reached the gas stations, and it broke the fuel level sensors in the cars' tanks.
Driving all EV? Then it is perfectly normal. Don't worry, comes winter, you will be seeing some decline on gas level. You have to use gas to heat your car!
My advice would be to drive to San Diego, CA. Nice climate, nice people, too far to go to find electricity all the way. https://goo.gl/maps/9KRxKecKgXxHuEfh8 Optionally you could drive back to Maine, but why?
Not always true. The car has a two-stage heat pump that can work perfectly well if you don't tax the car's electrical system too much (rear defogger, front defogger, 16 degrees F or lower).
Maybe not every winter day, but since he lives in Maine, I am sure he will have some winterly days when his ICE will kick in. For me, during Jan-Feb, when I first turn on the car in the morning, I could not keep the ICE off no matter what I did, even AC completely off.
Skylis' upcoming thread in a couple months will be "Gas gauge has moved!" Yes there are mornings when the Prime just does gas. And that's OK. Last couple of winters the days it did auto-gas start numbered less than 20 in the Chicago weather. I can live with that until it is Model Y time.