Is 44 cents per kilowatt hour expensive?

[aerodyne]

As you've seen from other replies, yes, that is not cheap. However, there are many SC's out there charging that rate, at least during part of the day. Then too, you get to some remote town and the only gas station in town charges a lot more than the ones on the interstates.

Depends on the battery. If you have an LFP, charge to 100%. Otherwise don't do it unless you need the range and use that charge pretty quickly. Don't let it sit for long over 80%. (Yes, 80.)

Yes, 80% is the new Tesla recommend limit for newer MS/MX daily charging.

I keep it at 50%, I'm consistent in being in the top third of the fleet on Teslafi range wise