Mileage per kWh Discrepancy

[JSC Los Gatos]

I reset both my Trip A and Trip B displays, and since the latest software update, I have a discrepancy in mi/kWh from the "Since Last Charge" and the Trip displays. I brought this to the attention of my service rep and he was stumped. Said he needed to refer this to Engineering. On the below photo, the 101.9 miles are the same for both Trip A/B and Since Last charged. Yet the kWh are different. Does anyone else have this situation? I am not sure which is the correct kWh. Seems like I am charging more often.

 

[Murcie]

My only guess would be that the “since last charge” accounted for energy consumption while the car is parked for HVAC, infotainment, etc, and the trip ones didn’t account for that. I don’t have a proof, just guessing. Did you happen to use your car while it’s parked for an extended period of time over these 101.9 miles?

 

[JSC Los Gatos]

My only guess would be that the “since last charge” accounted for energy consumption while the car is parked for HVAC, infotainment, etc, and the trip ones didn’t account for that. I don’t have a proof, just guessing. Did you happen to use your car while it’s parked for an extended period of time over these 101.9 miles?

Thanks for the reply, I drove the car on a regular schedule, no extended down time. I turn off what I can, AC, seat warmers, etc. However, everytime I walk into the garage, it wakes up

 

[Amster]

I reset both my Trip A and Trip B displays, and since the latest software update, I have a discrepancy in mi/kWh from the "Since Last Charge" and the Trip displays. I brought this to the attention of my service rep and he was stumped. Said he needed to refer this to Engineering. On the below photo, the 101.9 miles are the same for both Trip A/B and Since Last charged. Yet the kWh are different. Does anyone else have this situation? I am not sure which is the correct kWh. Seems like I am charging more often. View attachment 27196

Actually I think I saw something similar the last long drive I did.

 

[Buffalo Bob]

I don't see what the surprise is. Since Last Charge will include phantom drain, and the trip odometers' kWh will only show consumption on the drive. I guess 5 kWh of phantom drain may be high, depending on idle time, how often you are waking the car, what's turned on when the car does wake and other factors. Is your surprise just the magnitude of the difference? Sorry if I'm missing something obvious.

 

[Samo23]

My only guess would be that the “since last charge” accounted for energy consumption while the car is parked for HVAC, infotainment, etc, and the trip ones didn’t account for that. I don’t have a proof, just guessing. Did you happen to use your car while it’s parked for an extended period of time over these 101.9 miles?

This is the answer

 

[fadooly]

I think this is by design. Trip means a trip, you want to measure how much your consuming while driving.

there are a lot of these differences done by design as an example the speedometer is set to be the Speed-2 mi/h, so when you are doing 70 mi/h , you are actually doing 68 mi/h

there are of thoughts go into making a car some times because of law, norm, preferences, standards, safety, avoid legal cases or even to address subset of people who needs a specific feature

 

[JSC Los Gatos]

I don't see what the surprise is. Since Last Charge will include phantom drain, and the trip odometers' kWh will only show consumption on the drive. I guess 5 kWh of phantom drain may be high, depending on idle time, how often you are waking the car, what's turned on when the car does wake and other factors. Is your surprise just the magnitude of the difference? Sorry if I'm missing something obvious.

It could be phantom drain as the car wakes up every time I walk into the garage. How can I turn off the car so it does not wake up with just walking by it?

 

[DeaneG]

It could be phantom drain as the car wakes up every time I walk into the garage. How can I turn off the car so it does not wake up with just walking by it?

Turn off passive unlock. You'll need to press the door handle in to open it.

 

[Doxly]

I reset both my Trip A and Trip B displays, and since the latest software update, I have a discrepancy in mi/kWh from the "Since Last Charge" and the Trip displays. I brought this to the attention of my service rep and he was stumped. Said he needed to refer this to Engineering. On the below photo, the 101.9 miles are the same for both Trip A/B and Since Last charged. Yet the kWh are different. Does anyone else have this situation? I am not sure which is the correct kWh. Seems like I am charging more often. View attachment 27196

Its because trip A is the actual miles driven. Last charge includes all energy consumed parked as well as actual miles driven. This is why the latter is a higher Kwh used.

 

[Buffalo Bob]

... the car wakes up every time I walk into the garage. How can I turn off the car so it does not wake up with just walking by it?

Most people will tell you to turn off passive unlock from inside the car, but I just toggle off bluetooth on my phone, and then back on again when I leave the area. That's way easier than getting into the car's settings twice to turn passive unlock off and then on again.