I live in the San Francisco Bay Area and I have had my Model X for a year and a half, almost (July 2018, MCU2.5). For the first 6 months I owned the car I mostly used the superchargers at night. I did have a strange NEMA 6-15 connector in the wall of my garage when I moved in, probably for some washer or drier utility, but they are on the opposite side so I got an adaptor and I can charge at 3-4 KWh per hour. I am pretty cheap and was mostly doing supercharging since it is free.
I also have solar (and a whole house battery) and have been generating 20-25 KWH a day and exporting 8-10 KWH a day, depending. My monthly electricity charges were very low.
About a year ago my girlfriend got concerned about my late night supercharging habits… no waiting, and lots of spaces free. So I began charging at home more and more. My work hours are long and strange and I am out the door at 7 am and back home 9pm to midnight. Just plug in every night and I charge it up to 80 or 90% and I am good to go I the am. Doesn’t matter if it charges slowly at night.
Until I noticed over the past year that my Net Metering charges were going up $60 to $80 to $100 a month. WTF? The billed charges in the $%^&*@# PG&E bill were only $10 a month but the money owed at the end of the year was going up! I began paying more every month but it kept going up. So I called PG&E and had them explain the bill to me.
Basically, when I charge the car, it is like running the oven and the washing machine constantly all night- even at 3KWH an hour, it is a real drain. Over the past month I generated 261 KWH but used 614 KWH, and so I had to import 353 KWH from the grid, even though most of it was in the low non-peak rate ($0.33 per KWH).
So it looks like I am going to be doing more supercharging of the car. I occasionally charge it at work at a level 2 charger, but charging at night at my house might start to be come a luxury. I am wondering if others have looked at their charging habits.
When I owned two ICE cars by gas bills were about $200 a month, so this is certainly less, but by modifying my habits, I think I can pay less.
Here is the power consumption over the past year and one day’s power consumption graphically displayed.