Non random battery drain

[albanick]

I am the recently new owner of a 4 year old M3P and have noticed a very consistent battery drain issue. I've been reading threads on here for weeks and still can't figure this one out.

Every Wednesday, my battery 'loses' 4% while parked (not plugged in) at my work.

I downloaded teslafi to see if it gave me any more insight and all I can see is that I lose 4% while parked and the vehicle is sleeping.
Sentry mode is disabled and I don't have the self summon.
I raised a service ticket with Tesla and they said there is nothing abnormal in the log and it must just be the battery (bms) recalculating the actual available charge.
Bur every Wednesday (3 in a row) and always 4%. This surely can't be right.

Does anyone else have similar experience and importantly, has anyone found a fix (or at least the cause)?

Appreciate any help you can give.

 

[ewoodrick]

I know that you said you didn't have it on.

But have you looked at the Sentry Mode setting and confirmed it is completely off, not just off at home and work?

 

[redmunds]

My routine is pretty fixed. Charge to 80% on a Monday, short journeys to and from work Monday to Friday, move the kids about at the weekend.

Try mixing up your routine, such as starting Wednesday morning at 80%.

 

[GoergeJetson]

Another update, two days in a row I had 0% energy loss while parked at work for 9 hours. What changed? I changed my navigation destination to an address that I pass by before turning into my work address. This seems to end navigation and when I park the car, it goes to sleep and doesn't lose the 5%-6% of energy that I was losing on a daily basis, sometimes that much in the first few hours of being parked. I am not totally convinced I found the issue but this is the first time I've lost 0% energy while parked at work two days in a row. I think if I can experience no energy loss for 3 consecutive days or even full a week, I will have found the culprit, a bug in the software not allowing the car to sleep due to the nav system keeping the car awake, or on stand-by, while parked. I will update this thread again in another week or so.

 

[victor4v]

Have sou find a solution ?
I’ve got exactly the same problem for 5 months on my 2019 Model 3… 3 tickets at Tesla saying they detect nothing wrong… they just told that it was HVAC system that was keeping moisture out of the car after a drive. Sometimes this consumes more than the drive itself….. hope we’ll find an answer soon.
On my side i don’t think this has anything to do with the navigation because i end it every time like 5 minutes before arriving at work and still have this issue.

 

[GoergeJetson]

No, still have not figured it out, the drain is random, some days 5%-6% other days 2%-3% or occasionally less than 1%. It could be ambient temperature dependent, it seems like the days were I get less drain are cooler days, however we are now getting into the high 80's and the drain is as little as 2%. Standby mode just seems buggy to me. The other morning it showed a 5% loss within 1 hour of parking the car, there is no way the car can lose nearly 4 kW while parked and all systems off. I'd also guess it's BMS error but, the car is using a bit over 8 kW each way to get to and from work, all other percentages look consistent. It's still a mystery. Also, probably due to my my software revision, I never received the FSD trial.