2018 x75 loses 8 miles over 16 hours parked

[unpollo2]

so i charge to 80% which is 209 miles as my app tells me. this is overnight finishes around 10pm.
next day i work from home and around 2pm i get message on app that charging has begun at 201 miles.

i lost 8 miles overnight 16 hours plugged in?

 

[Raechris]

Sounds reasonable to me esp if cold soaked/ambient and may be fetching update files. What was the outside temp? Car does not charge again until meaningful loss when plugged in.

 

[unpollo2]

Sounds reasonable to me esp if cold soaked/ambient and may be fetching update files. What was the outside temp? Car does not charge again until meaningful loss when plugged in.

My garage is around 55F temp

 

[Jackotai]

so i charge to 80% which is 209 miles as my app tells me. this is overnight finishes around 10pm.
next day i work from home and around 2pm i get message on app that charging has begun at 201 miles.

i lost 8 miles overnight 16 hours plugged in?

Try click off the “always connected” from the energy saving. It consumes so much while parked

 

[_jmk]

I just had my X parked for 8 days at the airport without a plug at -5C average temp. The car lost 15% of charge during that time and nothing after day 5 (remained at 54%). Always connected on, no energy savings enabled.

 

[Logger]

so i charge to 80% which is 209 miles as my app tells me. this is overnight finishes around 10pm.
next day i work from home and around 2pm i get message on app that charging has begun at 201 miles.

i lost 8 miles overnight 16 hours plugged in?

It's not designed to constantly charge. Once charged to the limit it will wait it drops a few percent and then it will charge back up. Unless you have it set to charge at a certain time say 10pm. Then it will start charging again at 10pm the next day.

 

[ajdelange]

i lost 8 miles overnight 16 hours plugged in?

That's about 3% per day which is a little high but given 1% resolution in the display I wouldn't worry too much. I generally see 2%/da and that's with a couple of third party apps pinging the car and it sleeping only a couple of hours.

 

[Electric700]

Try click off the “always connected” from the energy saving. It consumes so much while parked

Try also enabling Energy Saving. I'm curious to know the range effect per day with either Energy Saving on or Always Connected off, as well as both set as indicated simultaneously. Has anyone tried this?

 

[Pilot7478]

It's very similar to my Jun. 2018 MX - about 3 to 4 % lose per 10-12 hours in cold.
My car doesn't have "always connected" setting.

 

[psbill]

On vacation for a week, left the car in the same garaged spot I have parked in for the 18 months I've owned my MX 90D-not plugged in. With garage temps in the 45-55 range, car had lost about 90 miles of charge in 8 days, compared with 45 miles lost for the same vacation period last year. Driving 30 miles consumes 70-90 miles of charge-big change from last winter. Service gave me all the 'best practices' tips, said there is nothing wrong with the battery. I suspect engineering has modified software in some way, whether to keep battery warmer or for some other reason, that is causing a drain that did not exist before.

 

[ajdelange]

Those drive numbers represent 33 - 43% efficiency. If you look at TeslaFi's histogram of efficiencies you'll see that the scale starts at 40% meaning that only a percent or two or X's are showing efficiencies this low. Clearly something is wrong here. How do the numbers look now that the week's hiatus is in the past?

 

[fbitz777]

so i charge to 80% which is 209 miles as my app tells me. this is overnight finishes around 10pm.
next day i work from home and around 2pm i get message on app that charging has begun at 201 miles.

i lost 8 miles overnight 16 hours plugged in?

you mean 90% for 209 miles (X75)?

And I too loose about 3kwh per day on vampire drain even with all options off...used be much less a year ago....
in the STAT app they should a large portion of owners are getting 5-10 miles per day of vampire drain

 

[psbill]

Thanks for the response, ajdelange. Drive numbers are the same as before vacation-2-3x charge miles consumed for every mile driven. Even keeping the heater off the past few days, not much change.

 

[ajdelange]

So your trip/charge meters are reading 600 - 900 Whr/mi?

 

[psbill]

They are reading in the mid to high 500's over 5 mile intervals, sometimes into 600's.

 

[psbill]

And, by the way, thanks for pointing me to Teslafi; hadn't looked at it before. Be happy to credit you there if you like.

 

[bikeandsail]

The lost range is mostly a function of whether the car is "sleeping" or not. My X loses about 1/2 mile range per hour if not sleeping and about 2-4 miles in 24 hours if sleeping. A program like Teslafi, which I use, is great for figuring out if and when your car is sleeping and if not sleeping why not.

 

[ajdelange]

They are reading in the mid to high 500's over 5 mile intervals, sometimes into 600's.

The fact of the matter is that the "mileage" you see depends on a whole bunch of factors which have been enumerated here many times. In general, aggressive city driving (short trips) in cold weather is going to use more energy than timid suburban/rural (longer trips) driving in warm conditions but individual trip usage can be all over the map depending on, for example, head winds. I offer as an example, and only as an example, the following scatter plot for my drives (about 80) since I have had the car (December 18).

The axis closest to the observer is the duration of the trip and the axis perpendicular to that is the temperature axis (30 towards the front and going up to 70 at the corner farthest from the eye. The bottom line from the picture is what I said above in words. Short, cold trips, in general use more energy per mile than longer warm trips but the plot certainly shows exceptions to this rule of thumb.

The only way to really appreciate what is going on is to use some scheme for data collection. I have mentioned TeslaFi before and continue to recommend it but there are other programs out there that do essentially the same thing.

As a matter of possible interest, an analysis of my 80 drives shows that watt hours per mile change by approximately 1.2 Wh/mi/ °F. Thus at 30 °F I find I'm using, on average, 40*1.2 = 48 Wh/mi more juice than at 70. That's appreciable. YMMV. This figure depends not only on the physics (denser air at colder temperature and weather) over which the driver has no control but also on the driver's battery management technique, his driving technique, how he uses the HVAC system etc.

 

[psbill]

Thank you. That's a helpful explanation.