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The Vampire load on my new Model S is a lot more than I thought. After sitting idle in the garage for 2-1/2 days, it went from 176 miles left on the charge to 138. This is a fair amount - 6% or more per day! That doesn't bode well. I do note that winter is setting in, and the night lows are about 30F with highs about 40F. It's starting to get colder now, so that might require more energy (I'm assuming most of the load is due to keeping the batteries warm).
Does anyone know if the update to software 4.0 will improve this?
Does anyone know if the update to software 4.0 will improve this?
Todd Burch
14-Year Member
gg_got_a_tesla
Model S: VIN 65513, Model 3: VIN 1913
Right, but, how do we deal with the kind of post-4.0 vampire load that MikeK experienced with parking his car out in the cold?!
How can Tesla claim that the Model S can be left at say, the airport long term parking lot for say, 2-3 weeks without plugging in?! Tesla's post-roadster-bricking-hoax blog post doesn't hold up?!
Plug It In | Blog | Tesla Motors
Just a note from the OP of this thread that 4.0 STILL has not downloaded to my Model S. I spoke with the service manager in Menlo Park a couple of days ago and he was checking with HQ on why I had not received it yet. So I continue to lose 10 miles/day or more now that night time temperatures are around 35 F.
My Think City does not suffer from 12 V battery failures. I'm still using the original 26 Ah battery, it's about 12 years old now.
It continually monitors the voltage of the auxiliary battery and fires up the DC-DC to charge it whenever it's low. Its single problem related to the auxiliary battery is that it terminates charging a little early, before the 12 V is completely charged. This causes it to run the DC-DC too often in cold weather, which can waste up to a kWh or two per day when it's really cold. I'm guessing the engineers didn't want to push the entire 12 V system up to 14.2 V. If Model S has a separate output for 12 V charging, it should not suffer from this.
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Although I don't know the 12V failure rates for the automobiles mentioned above, it seems from reading the forums that the Model S's may have the highest 12V battery failure rates of all, particulary considering the number of failures suffered by S owners with very new cars. The Leaf may have the least (but I'm guessing, based solely on the "testimonials" reported in the forums).
strider
Active Member
The question will be how many cars that were delivered w/ 4.0+ software have 12V problems. If the number drops then the speculation that the vampire load from early builds trashed the early 12V batteries and newer cars (and early cars w/ 12V batteries after 4.0) won't have the problem. Early days....
dailydriver
Member
Confirmed typical vampire load of 10-11 miles per day
I was just on vacation and decided to leave my Model S unplugged for the duration to confirm how much battery loss there would be (I don't have v4.0 software yet). The car had 238 miles of range the day before we left after completing a standard charge. The car had 174 miles yesterday (6 days later). Both readings were taken the same time of day (within about 15 minutes). The car was parked in our insulated garage (unheated) and the outside temps probably averaged just under 30 degrees.
64 miles of range consumed in 6 days = 10.66 miles/day
January 1st:
January 7th:
I was just on vacation and decided to leave my Model S unplugged for the duration to confirm how much battery loss there would be (I don't have v4.0 software yet). The car had 238 miles of range the day before we left after completing a standard charge. The car had 174 miles yesterday (6 days later). Both readings were taken the same time of day (within about 15 minutes). The car was parked in our insulated garage (unheated) and the outside temps probably averaged just under 30 degrees.
64 miles of range consumed in 6 days = 10.66 miles/day
January 1st:
January 7th:
JRP3
Hyperactive Member
Vampire Battery Drain/Discharge
The User's Guide states that a Model S should have 1% battery drain a day (presumably from battery decay and powering the onboard systems used when not driving). I've read many different views on what ACTUAL loss rates are. Has anyone figured out what your actual discharge rate is? This can be estimated for your car many ways, but very simply by:
(1) Unplugging and not using the car for 24 hours, noting both the "Mile Range" numbers that appear on the dashboard before unplugging and at the end of the 24 hour period
(2) Subtracting the "Mile Range" number showing at the end of the 24 hour periood from the "Mile Range" number showing before unplugging, then
(3) Dividing the result of step (2) by the "Mile Range" number before unplugging.
I am doing this now on my new Model S and am interested in what others are seeing.
The User's Guide states that a Model S should have 1% battery drain a day (presumably from battery decay and powering the onboard systems used when not driving). I've read many different views on what ACTUAL loss rates are. Has anyone figured out what your actual discharge rate is? This can be estimated for your car many ways, but very simply by:
(1) Unplugging and not using the car for 24 hours, noting both the "Mile Range" numbers that appear on the dashboard before unplugging and at the end of the 24 hour period
(2) Subtracting the "Mile Range" number showing at the end of the 24 hour periood from the "Mile Range" number showing before unplugging, then
(3) Dividing the result of step (2) by the "Mile Range" number before unplugging.
I am doing this now on my new Model S and am interested in what others are seeing.
Thanks. Trying to get a view on likely experiences with percent lost numbers in this post. Not the reasons or diagnostics which have been exhaustiley (believe me, I've been reading!!) reported elsewhere. Having said that, any replies with whether people have installed the latest firmware (or what firmware they have) would be good to see too. The latest firmware (4.0 I believe) corrected some drain in the past.
No problem. It did but they then took out the 'let displays go to sleep' function in V4.2 due to issues. It should come back though. People were seeing about 8 miles of range a day without the sleep mode due to the drain.
Depends on the ambient temperature. If it's very cold, then that wouldn't be unusual at all. I don't think new car has much to do with it (new in terms of miles). New in terms of model newness is another matter. Basically, all this will get straightened out as future updates are pushed--I'd guess within a year.
It depend on your SOC a bunch in addition to the temperature. I will post some #'s soon. my data is getting big enough that it might be useful. I just got my 3rd factory tour today!! wohoo the place is f-ing kicking A...
Would you mind sharing the differences in the factory from your last tour? What makes it "f-ing kicking a..."
haha.. Well, I had the first tour last year in Oct. Second tour Dec 1st last year when I picked up my car (AWESOME!!!) Last tour today while I had my 'temperamental' drivers door handle replaced (functioning but retracting sensor thought it was 'in' when it hadn't gone in yet) and tires rotated + 'my tesla' image changed to show the 21" wheels.
Today there seemed to be a lot more of the boxes of parts for cars in the massive storage area - think 'The Lost Ark' warehouse of boxes stacked tall, much more than there was in December. Tons of cars finished in the Shipping area as well as near the service area (1000-2000?) There are many more areas for paint inspection than we saw before and new areas of the factory that are being used that looked like they were barely touched < 2 months ago. It was mentioned that they are at 10 minutes per station but pushing to 7 or less which would let workers have shorter shifts (I think that was in final assy).
many-many sub assemblies ready to go and it looks like they are using 4 parallel stations for panel sanding(specifically hood panels this afternoon) and final prepping before welding assembly
No cars were being 'burned in' the last time we were there. They do the 27 miles on a 4 wheel Dyno of sorts. Pretty neat.
White floors are getting scuffed up a bit.
Saw a few painted bodies come out of the paint area getting ready to go on the auto-dollies
Tires on the 21" greys look like they are pilot sports now?
220 miles down to 212 in ~9 hrs at ~40F last night
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I have logged a few data points (see http://www.teslamotorsclub.com/show...sumption-of-Your-EV/page2?p=256023#post256023
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