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battery sleep consumption

battery sleep consumption

Hi all,
probably a normal behavior of the battery but just in case asking.
I have parked the car on Monday at 11Am with 161 miles remaining.
will be back to the airport today and I have checked on the Tesla App and it says 148miles.
14 miles lost in 48 hours.,
does it sound right to you?
Again non complain here, just a question.
Thanks

Theresa | June 19, 2013

Yes the vampire drain is well known and it varies on the amount by vehicle. But the rate you are seeing sounds in the normal range. There is talk about a future software update improving that.

tobi_ger | June 19, 2013

Sounds on par with other mentions in other threads, yes.

jonesxander | June 19, 2013

Yeah cinquo sounds about normal. Not sure why everyone freaks out that the battery drains when not in use. I mean cell phones do the same thing.

Not that you're freaking out cinquo, but the fact that it's called "vampire drain" is pretty silly (replace silly with stupid) to me. If I have a full charge on my cell phone and go on a 2 day trip and whoops forget my cell phone....I don't expect it to even have half charge, or maybe even fully discharged when I get back.

Vampire drain would be like if it was 25 - 35% loss in a night or something that would be something to be concerned about.

Stop calling it vampire drain.

thomas.schlatter | June 19, 2013

Who knows how much vampires need? I know some vampires that only drink a few drops of blood per night (or did I see that on tv?)...
I like the expression Vampire Drain!

Jolinar | June 19, 2013

vampire drain is so known term nowadays (on this forum) that it can't be changed :)
it's similar with broder :-D

Theresa | June 19, 2013

jonesxander, You may be satisfied with that type of loss but since I also own a Roadster maybe I got spoiled with a loss of no more than a mile per day. Even allowing for 2-3 miles loss of range per day that is A LOT of power for computers and controllers.

riceuguy | June 19, 2013

I lose about 12 miles per day at the airport, but they have been very clear that they intend to resolve this issue over the summer.

laurentjd | June 19, 2013

Thank you all for the answers.

Brian H | June 19, 2013

Vampire drain is a general industry term for battery devices describing charge draw while the device is switched Off. Also for "Instant On" TVs, etc. The "sleep" upgrade that 4.1 had and which will soon be re-instated will cut it to about 2 mi/day, at the cost of slower display boot-up etc.

cloroxbb | June 20, 2013

That's odd, if I am NOT using my cell phone (iphone 5), that means I am not turning the screen on. I have had my iPhone last about 2 days in the "Vampire drain- only state."

My point is, is that we DONT expect our batteries to drain significantly unless we are actively USING the device.

If your cell phone's battery depletes that fast, and you aren't actively using it, then something is wrong.

cloroxbb | June 20, 2013

With that said, NOBODY should expect their Model S to drain significantly when not in use. Tesla acknowledges the PROBLEM (their word) and is actively looking into a way to FIX it.

Excessive Vampire drain IS a problem.

altechlab1 | June 20, 2013

we try to add self charger modul for supercap block to obtain selfcharged battery for EV. As soon as we done in this project we would infor TMC about...

Brian H | June 20, 2013

Of course excessive drain is a problem. By definition. The point is that there's a trade-off between systems ready to respond immediately and power conservation. Pick one.

AmpedRealtor | June 20, 2013

I pick power conservation. I don't need my car to take off instantly at the expense of range while it's sitting and doing nothing. Even ICE cars need to be started, they are not ready to go the instant you get in. The only system that really needs to be active is something that detects the proximity of the key. When it detects the owner approaching, it should initiate a startup of all systems which should be fully operational by the time the owner enters the vehicle. With all of the technology in the car, surely this is a simple thing.

riceuguy | June 20, 2013

@AmpedRealtor, actually you do need several other systems on, such as battery monitoring/cooling, 3G for communication with the app, etc.

AmpedRealtor | June 20, 2013

@ riceguy - all good points. I'm sure the thermal management system for the battery takes up quite a bit, especially when you go into more extreme climates. Someone said the Roadster only loses about 1 mile of range in 24 hours. Given that the Model S has a lot more computer technology than a Roadster and requires pretty much constant 3G connectivity, do you think it will ever be able to get its vampire drain to the same level as Roadster?

wolfpet | June 20, 2013

My understanding is that on some occasions the combination of the OS and hardware drivers failed to wake up after a deep hibernation. The immediate workaround was to keep the entire system on at all times. The promise was to isolate and fix the root case eventually. I have seen similar issues with some early Intel chipsets and operating systems. This issue may or may not be trivial to fix though.

cloroxbb | June 20, 2013

My response was directed more toward jonesxander rather than Brian.

pdx4s | June 20, 2013

Do we know what OS the human interface computer is running ? Assuming it has multiple computers/controllers the HI computer should be in some type of a stand by with power management options. Rest of the computers/controllers should be off and awaken by the main computer when needed. With correct power management programming they could potentially acieve even longer batt. range/standby.

There is also internal batts current leak.

All these factors should have been characterized by now by their eng. teams.

TFMethane | June 20, 2013

When I picked it up, I was told that the model S runs on a flavor of Android.

TFMethane | June 20, 2013

I think they don't publicize that because they want "early adopters" to buy the car. A lot of them are iPhone fanboys, so it would hurt their sales. However, they probably wanted an open source OS, so they had Android and Linux to choose from basically, unless they were going to develop a proprietary OS. since a lot of the hardware (shifter, window buttons, etc.) are borrowed from other luxury car manufacturers, it's not surprising they didn't write a custom OS.

Brian H | June 21, 2013

Elon committed to have the problem solved and sleep restored before the European cars shipped.

Alex K | June 21, 2013

@TFMethane | JUNE 20, 2013: When I picked it up, I was told that the model S runs on a flavor of Android.

This has been discussed previously allot, but the Model S does not run a flavor of Android. It runs Linux with a custom UI. Here is an excerpt from an online article, for example:

JBS: We wrote most of the software in the car ourselves. All of the screens you see were programmed here, designed here, and we have a whole team of software engineers upstairs implementing that and making it a reality. We are using an operating system that is a version of something called Linux.
http://www.pcworld.com/article/260883/tesla_cto_talks_model_s_batteries_...