I have never felt I get the proper charge or mileage out of my model X. I am hoping someone with more Tesla battery knowledge than me can help clarify if what my MX gets is correct or if I need to get the battery looked at. I performed a little test and tried to get as much info as possible to yield some accurate results. I would appreciate feedback on the below. 2016 MX 75D with approx 85,000kms Charged with HPWC to 100% - 356kms (this seams low to me). Car sat overnight in a warm 11 degree C garage. Car was still plugged into the HPWC. I warmed up the car for about 15 minutes prior to departure using the app. Left in morning with battery at 351kms. Temp is 2 degrees C outside. Drove 109.3kms, battery is now at 197kms. Approx 3/4 of the trip was county roads and 1/4 of the trip was city driving. Very little traffic. Driving was in the dark with cabin at 23 degrees C. Both front heated seats on for 1/2 the trip. The car averaged 249wh/km and consumed 27.3kwh for the drive. This is based on the info on the MCU screen. I did not use AP or cruise for this trip. I have 20” wheels. Is this normal? Car used 154kms for this trip? 2 weeks ago when it was really cold outside, approx -15 degrees C, the car used the ENTIRE battery for the exact same trip. I appreciate your help.
Hi Jillmark99, Have you owned the car since 2016? What was the EPA/sticker mileage when you bought it? If my math is correct 249wh/km would be about 400wh/m... My lifetime average on a 2018 X100D also on 20" tires is 375wh/m. Cold as you know severely limits battery output/mileage... Set heaters on... Set at 1, 2, or 3 bars??? It does not look too far off to me... Some people here plan/expect 50% of their "normal" mileage in the cold. Shawn
You left out one big factor ... how fast were you driving? I know you did country and city. You can see below that the speed matters. 1) 2C/35.6F which is fairly cold (battery temp and lubrications (any moving part in drivetain)) and you were heating the cabin to 23C/73.4F which is somewhat warm. -- I'd use your seat heaters 100% of the time and lower your cabin temp a little. 2) I wonder if your tire pressure is good. I run my Xs at 45 psi cold. 3) Have you used abetterrouteplanner.com tool/website to map out your route? You can put in your vehicle X 75D and at least 5-7% battery degradation. Also put in the 'Road Conditions' and outside temps. -- clicking on the resulting route line also brings up elevation. Makes a big diff if you are going even a little uphill. Example of a 348 km drive in 2C for a 75D
The drive was fairly flat. Not a lot of hills around here. I was driving approx 110kph outside the city and about 60kph within city limits. Tire pressure is at 45psi.
Try abetterrouteplanner.com with your temperatures and accurate to/from locations to see it it comes lose. Try the two temperatures 2C and -15C. P.S. You are welcome for all the details above. Geez.
I have not owned it since new. I purchased it second hand but I’ve owned it for quite a while. Seat heaters are usually on high.
Winter is NEVER the time to attempt to match the car's rating. At 2C, I suspect that you will have over 30% degradation in range. That's just the fundamentals of pretty much any battery. To see if you are making the range, in the summer with 23C temps, make a highway run at 60 mph from 100% to 10%. That should allow you to get a real estimate of the battery's range. To get MUCH better understanding, watch the Energy graphs for a real time estimate of your consumption and range.
A comparative example of how my X is affected by temperatures. This is from TeslaFI.COM built in table it made for my car but I customized in Google sheets for C and km
Your'e welcome. I was curious myself as I've had some close calls in the winter. I actually thought the percentages would be a LOT worse the colder it got. Have you tried A Better Routeplanner ? It has a lot of miles of testing behind it and you can play with temperatures.
No I have not tried it. The route in my OP is travelled often by myself and my wife. I might sometime. Was just curious if the battery consumption seamed normal. When I drive my S I don’t use near as much battery. I know the X chews up the electricity more than the S but my X just seams excessive. Maybe it’s correct, just seams high consumption to me. Thanks for the replies.
