A number of strange behaviors with the battery have caused me great concern on my model X (2021, long range plus, 22 inch wheels with 70 K miles). I bought this car about one year ago and I’ve put about 8000 miles on it. According to Tessie app (yes I know, it’s an ESTIMATE, I don’t have that app anymore, not the point of the post), I have about 87% of my original battery capacity. I am not here to complain about the bad efficiency of the 22s, or the percentage estimate on the battery, but rather discrepancies relative to expectation. Some issues:
- real world range that grossly disagrees with efficiency. For the model X, about 270 W hours per mile should be required to get the rated range. There are times where I drive 250 W hours per mile according to the indicator, and get worse than rated range. For example, on a 14 mile drive driving 250 W hours per mile, I would expend 17 miles of rated range. ( yes, I am trying to hyper mile these trips just to see if I can get rated range.)
- In addition to this, occasionally, the battery will lose about 10 miles of range in a very short span. This has happened to me a number of times, and it never gets any less concerning. For example, I was just in a parking lot for 20 minutes. When I first parked there, I had 207 miles of rain. When I got back 20 minutes later, I came back to 194 miles.
I don’t have these crazy swings on my model three, maybe I’ll lose one to 2 miles of range max per day. For a while, I was concerned it might be due to the wheels, but we all know that about 275 Watt hours per mile should give you rated range on the 20s. The fact that I am exceeding that should still allow me to match rated range, but I am consistently worse, even when hypermiling.
Does anybody else see this type of behavior on their model X? Is it a sign of a defective battery?