Well, I got news for you. This isn't entirely your fault. Your MS absolutely should have retained that range while while you were at your event. My car sleeps just fine even with the fob inside the car. It DOES NOT measurably increase vampire drain in my experience. I probably would've done the same thing knowing that 7-8 miles was more than enough to get home.
-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Well, I got news for you. This isn't entirely your fault. Your MS absolutely should have retained that range while while you were at your event. My car sleeps just fine even with the fob inside the car. It DOES NOT measurably increase vampire drain in my experience. I probably would've done the same thing knowing that 7-8 miles was more than enough to get home.
paco3791
TMC OG
For whatever reason I don't believe vampire drain is linear, or at least the reporting on such range via the guess-o-meter isn't linear. I have also experienced seemingly increased vampire when at lower states of charge, in my case WITHOUT the key fob in the car. In my case we stopped to get some dinner with about 20 miles of range remaining with about 12 miles to the destination, when we came out of the restaurant about an hour or so later rated range had dropped by 6ish miles or so. Luckily we made it to our destination, but I had to run past 0 miles to do it.
So my guess is that the effects of vampire drain get amplified at lower states of charge either because of how loads act on the battery or because of something in the algorithm that determines the rated range indicator, possibly something to do with the operating temperatures of the battery? In any case, letting the car sit at very low states of charge, key fob or no, the effects of the vampire appear to be more severe. But maybe it's just higtened anxiety from running on the edge of the battery that makes it seem that way as well, little from column A, little from column B I'm sure.
Last edited:
I agree - when battery is low and you need to cover distance, it's a good idea to take advantage of any available charging opportunity. Kind of like my mother telling the kids - especially my sisters - to always use the restroom at every stop on our road trips :smile:.
Fortunately in the last six months we have had several new superchargers arrive in wintry New England, which makes things a little easier. But at Thanksgiving a year ago I had a challenging drive from Boston to the Adirondacks, chronicled here on the New England subform: Don't try this at home.... I even plugged into a 120v outlet on a 20-minute ferry ride, to help me make it!
Todd Burch
14-Year Member
Thanks for sharing for the betterment of others, Evan.
I agree that the loss of 7ish miles over the course of a few hours(?) is not vampire drain. I think what's really happening is that the "miles remaining" indicator is just not accurate at very low states of charge, and if sitting for a while at low states of charge the algorithm settles some and cuts off power earlier.
I agree that the loss of 7ish miles over the course of a few hours(?) is not vampire drain. I think what's really happening is that the "miles remaining" indicator is just not accurate at very low states of charge, and if sitting for a while at low states of charge the algorithm settles some and cuts off power earlier.
ChadS
Last tank of gas: March 2009
Makes sense, Todd does. Many factors affect the range estimate (which is largely an estimate of when the car will hit a certain voltage level). Was it perhaps cooler when you returned to the car and found it with no range left? Tesla has said there are several other factors, though of course they don't like to detail them for us.
Todd Burch
14-Year Member
ChadS
Last tank of gas: March 2009
Yes, I was channeling Yoda.
No, I don't know why. But perhaps efusco's disturbing lack of faith in the Musk is why he didn't make it home. After all...
Do, or do not; there is no try.
No, I don't know why. But perhaps efusco's disturbing lack of faith in the Musk is why he didn't make it home. After all...
Do, or do not; there is no try.
Last edited by a moderator:
It was a bit cooler, and compared to the battery temp after a 230 mile drive I'm sure after the 5 hours of being parked that the batter temp was quite a lot cooler. I did see the cold temp warning twice that day, but the ambient temp was never lower than about 57F.
ChadS
Last tank of gas: March 2009
Hmm. I wouldn't think that would be cold enough to make much of a difference; but you didn't have much to start with. Not sure if that was it or not.
paco3791
TMC OG
I do not carry one, but I can see the peace of mind benefit, along with being able to help out other stranded ICE'ers with out having to touch your car's 12V system.
Kalud
Active Member
I do carry one that also includes a air compressor. It fits well in the trunk on the drivers side hole. I also carry a tire repair kit. Its just for peace of mind for longer trips with my whole family. Things like that often happens at night out of nowhere...
I do not (did not?) carry the jumper box with me. I have brought it on some longer trips a few times, but more for the air compressor than for the 12v. In this case my house was 1.5miles away so my wife brought it down in her car.
To the point above, I'm pretty convinced that the issue with jumping the 12v was that both clamps were resting on the metal bar that the connection bolts are attached too and that was causing a short. Once I had my box I made sure that the positive clamp was touching nothing but the positive bolt.
If I were to suggest an improvement, it might be to put an insulator pad along that metal edge to prevent incidental contact as I think large clamps would be difficult to attach and not have them sag down and touch the metal.
Note that the metal in front of the red capped bolt (positive terminal connection) is very easy to make contact with when charging with just the nose cone off.
To the point above, I'm pretty convinced that the issue with jumping the 12v was that both clamps were resting on the metal bar that the connection bolts are attached too and that was causing a short. Once I had my box I made sure that the positive clamp was touching nothing but the positive bolt.
If I were to suggest an improvement, it might be to put an insulator pad along that metal edge to prevent incidental contact as I think large clamps would be difficult to attach and not have them sag down and touch the metal.
Note that the metal in front of the red capped bolt (positive terminal connection) is very easy to make contact with when charging with just the nose cone off.
Please do not let this thread get off topic...we can start a new one in off-topic if you'd like more information...
2015 Bramble Schoole Muster - an album on Flickr <- These are from the day I killed my battery
Collection: Bramble Schoole <-These are from many of the activities I've photographed.
It's all fun and games until someone loses any eye! Good thing there was a doctor there contributing to the mayhem!
- - - Updated - - -
Possibly cover the area in question with duct tape?
Similar threads
