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14 Day winter parking at airport - RESULT

Hi guys -

wanted to share an interesting observation. We recently parked out MY for 14 days at JFK airport in the long term garage. I expected that it would drop about 1% per day.

I did the following:
- Charged to 90% at JFK super charger
- Turned off: Sentry + Wifi, Auto Lights and anything that could possibly draw any energy while I am gone.
- Manually powered down the system
- Car was at 87% by the time I parked it.
- Average temp was around 38F, so definitely not proper winter temps.

To my surprise it only dropped 2% over two weeks. I did check on the car 2 times over the two weeks but also used Tezlabs Deep-Sleep Assist. Not sure how that affected it but definitely was positively surprised that we had enough charge to drive home (140 miles) without the need of a re-charge.

Cheers!
 

Zoomit

Active Member
Sep 1, 2015
2,305
4,553
SoCal
To my surprise it only dropped 2% over two weeks.
Four or five years ago, every fifth post on this site was about phantom drain. They fixed it.

Your experience matches mine during quarantine in the summer of 2020. My ‘18 Model 3 used about 1% every six days. In this mode, the biggest consumer of electricity appeared to be when it woke up to download a software update, which happens every 2 weeks on average.
 
- Manually powered down the system

To my surprise it only dropped 2% over two weeks. I did check on the car 2 times over the two weeks but also used Tezlabs Deep-Sleep Assist.

I’ve never done it, but I guess I assumed if you did the power down you could only wake the car up while you’re physically there. What does powering down the car do then?

Edit: Appears it’s just put it to deep sleep now. Always assumed it was more.
 
Well, I have been seeing my batt run down each day, just sitting on the driveway. It was about 20miles a day when I first got it 2 weeks ago. Read here that the Sentry mode takes alot. So I did disable that. Also manually powered of the AC each time I got out of the car, just in case.

So this is what I see now after parking it for 2 days. Still drops a few each day but not the 20miles I saw before. Anything else I should be looking at?
1/31/22- 253
2/2/22- 246
 

jcanoe

Well-Known Member
Oct 2, 2020
6,750
7,650
Maryland
Well, I have been seeing my batt run down each day, just sitting on the driveway. It was about 20miles a day when I first got it 2 weeks ago. Read here that the Sentry mode takes alot. So I did disable that. Also manually powered of the AC each time I got out of the car, just in case.

So this is what I see now after parking it for 2 days. Still drops a few each day but not the 20miles I saw before. Anything else I should be looking at?
1/31/22- 253
2/2/22- 246
Recommend you tap the estimated range value next to the battery icon to display the percent state of charge (SOC). SOC is a more accurate. The SOC dropped 2.7% over the shown period.

As the outside temperature rises Cabin Overheat Protection may activate to maintain the cabin temperature below 105F. Cabin Overheat can use quite a bit of the battery (~.75kWh), per hour, although Cabin Overheat Protection only remains active for 12 hours after you park. You can turn off Cabin Overheat Protection or set this to fan only (no AC.)
 
Last edited:
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Well, I have been seeing my batt run down each day, just sitting on the driveway. It was about 20miles a day when I first got it 2 weeks ago. Read here that the Sentry mode takes alot. So I did disable that. Also manually powered of the AC each time I got out of the car, just in case.

So this is what I see now after parking it for 2 days. Still drops a few each day but not the 20miles I saw before. Anything else I should be looking at?
1/31/22- 253
2/2/22- 246
I would say that's normal. My Y gets similar numbers in my garage, at a perfect 70F temperature. It consistently loses 3-4 miles over a 24 hour period. I've been on trips of 5-7 days each quarter in the past two years, and it sure is consistent. I also power down the car and not checking on the app. But otherwise, my battery is great. After 8 months and 10K miles, I'm only losing 7 miles of range (319 from 326).
 
Recommend you tap the estimated range value next to the battery icon to display the percent state of charge (SOC). SOC is a more accurate. The SOC dropped 2.7% over the shown period.

As the outside temperature rises Cabin Overheat Protection may activate to maintain the cabin temperature below 105F. Cabin Overheat can use quite a bit of the battery (~.75kWh), per hour, although Cabin Overheat Protection only remains active for 12 hours after you park. You can turn off Cabin Overheat Protection or set this to fan only (no AC.)
Thanks.
Oh, I did turn off the Cabin Overheat protection too, when I disabled the Sentry mode.
 
I would say that's normal. My Y gets similar numbers in my garage, at a perfect 70F temperature. It consistently loses 3-4 miles over a 24 hour period. I've been on trips of 5-7 days each quarter in the past two years, and it sure is consistent. I also power down the car and not checking on the app. But otherwise, my battery is great. After 8 months and 10K miles, I'm only losing 7 miles of range (319 from 326).
You mentioned power down the car. Is there other steps more than actually power off the ac and locking the car? I'm probably not for sure. Any tips is appreciated.
 

Rocky_H

Well-Known Member
Feb 19, 2015
8,781
11,459
Boise, ID
You guys referring to "miles" really need to do as jcanoe says first thing - change to the percent state of charge vs miles. That's the first step to maintaining your sanity....
This very much depends on people's personality type. But first off, I make sure to say "rated miles" instead of "miles", to remember and make clear that it is the optimistic, granny-style driving unit of measure of the EPA, and will not usually correspond to real miles of distance. It's informative, but is always going to be ballpark high. People frustrate themselves when they say "miles" and then are thinking of it as "miles", and then it turns out not to be.

So if you are a laid back person like I am and can use that as an optimistic fuzzy unit of measure, then it's fine. But if you are one who stresses over that and it gets under your skin that it's not literal miles, then yeah, you should probably switch to % so you don't have to see it and let it bother you.
 
You mentioned power down the car. Is there other steps more than actually power off the ac and locking the car? I'm probably not for sure. Any tips is appreciated.
Yes, Controls, Safety, Power Off. Honestly I don't know if this does anything more than putting the car into deep sleep right away, but I do this when I'm about to go on an extended trip. It doesn't interfere with scheduled charging while powered off.
 

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