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Model 3 vampire drain after FW upgrade

nogajim

Member
Nov 5, 2015
87
131
Lawrenceville, GA
Have current software. Dropped from 221 to 220 overnight (12 hrs). Not complaining. Our family room is next to our garage, so it handles the proximity to phones without a problem.
 

M109Rider

Active Member
Apr 8, 2018
1,596
1,648
Kitchener, Ontario
What’s normal drain?

I parked my car for two days and I’ve lost 10 miles.

My fiat 500e can be parked a week and it loses maybe 1 mile.

Hopefully they can find a fix with less drain soon.
I wouldn’t mind some drain, but this is a little high.

I’m not sure you can really compare a fiat 500e to a Tesla though.
84 miles on a charge, with not outside communication, and very little tech on board.
Very cool car, my wife wants one, (she has a Fiat 500 gas version right now), but the 500e is not even in the same league as the Tesla.
 

ebmcs03

Active Member
Dec 22, 2017
2,186
1,132
So Cal
Hopefully they can find a fix with less drain soon.
I wouldn’t mind some drain, but this is a little high.

I’m not sure you can really compare a fiat 500e to a Tesla though.
84 miles on a charge, with not outside communication, and very little tech on board.
Very cool car, my wife wants one, (she has a Fiat 500 gas version right now), but the 500e is not even in the same league as the Tesla.

I agree. But even with the Tesla tech it should be able to shut down and minimize the power drain. At this rate I wouldn’t want to park it at the airport parking. I disabled all Tesla app and pinging from the phone(s) so it won’t wake th car up. Yet still getting 5 mile drain a day.
 

chronopc

Active Member
Jul 8, 2017
2,873
2,722
California
What’s normal drain?

I parked my car for two days and I’ve lost 10 miles.

My fiat 500e can be parked a week and it loses maybe 1 mile.
According to the manual, 1% lost a day is normal.

Battery Care
Never allow the Battery to fully discharge. Even when Model 3 is not being driven, its Battery discharges very slowly to power the onboard electronics. On average, the Battery discharges at a rate of 1% per day. Situations can arise in which you must leave Model 3 unplugged for an extended period of time (for example, at an airport when traveling). In these situations, keep the discharge rates in mind to ensure that you leave the Battery with a sufficient charge level.
 

ebmcs03

Active Member
Dec 22, 2017
2,186
1,132
So Cal
So I’m averaging almost 2% a day. Humm not terrible but I like less.

I’ll bring it up at service and get some recommendation on what to do to minimize drain
 

omgwtfbyobbq

Active Member
Aug 24, 2013
1,450
1,612
Southern California
I agree. But even with the Tesla tech it should be able to shut down and minimize the power drain. At this rate I wouldn’t want to park it at the airport parking. I disabled all Tesla app and pinging from the phone(s) so it won’t wake th car up. Yet still getting 5 mile drain a day.
That's probably the HVAC blower keeping cabin temps down. The only thing I can think of for that is to put on a car cover, probably with a cable/lock if you're leaving it alone for a while.
 

ebmcs03

Active Member
Dec 22, 2017
2,186
1,132
So Cal
Weird. If that's the case, your car should be in deep sleep mode and shouldn't be draining.

Ya That’s what I thought. So not sure what’s wrong. I’ve seen it deep sleep over night before. So I’m wondering what changed. Other than the newest software.
 

chronopc

Active Member
Jul 8, 2017
2,873
2,722
California
Ya That’s what I thought. So not sure what’s wrong. I’ve seen it deep sleep over night before. So I’m wondering what changed. Other than the newest software.
Do you keep your car plugged in? It may have something to do with the battery management system which I imagine would vary depending on temperature.
 

slipnslider

Member
Apr 13, 2016
787
879
los angeles, ca
Battery Care
Never allow the Battery to fully discharge. Even when Model 3 is not being driven, its Battery discharges very slowly to power the onboard electronics.
My question is - why do the electronics have to be powered when the car is off? I know some power is used to keep the battery temp out of dangerous levels, but what else? If all this juice is being used uploading autopilot data to the mothership or something, they should let us turn that off.
Vampire drain is rarely mentioned on the list of things that make EVs inferior to ICEs but it's a valid concern. You can park an ICE for months, and the worst that will happen is it'll need a jump start. With a tesla, If you're on vacation and some disaster forces you to extend your trip by a week or two, you have to start thinking about returning to a dead car that can't be easily jump started or towed.
 

chronopc

Active Member
Jul 8, 2017
2,873
2,722
California
My question is - why do the electronics have to be powered when the car is off? I know some power is used to keep the battery temp out of dangerous levels, but what else? If all this juice is being used uploading autopilot data to the mothership or something, they should let us turn that off.
Vampire drain is rarely mentioned on the list of things that make EVs inferior to ICEs but it's a valid concern. You can park an ICE for months, and the worst that will happen is it'll need a jump start. With a tesla, If you're on vacation and some disaster forces you to extend your trip by a week or two, you have to start thinking about returning to a dead car that can't be easily jump started or towed.
My guess is that it has something to do with the car always being in constant communication with the Tesla servers. An option Tesla could add is to fully shut down the car when someone goes on an extended vacation.
 

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