I can only speak for myself in why I did it. I worked in the Aviation field for years and SLA batteries is all we used. Only receive my Tesla this month but before I read almost every post about the battery system. It wasn't until I received it did I see that the 12v system is in a always on state. I had the car in the garage and I could hear the contact for the 350v to 12v charger clicking on every so often too often for my taste. So I decided to see how much the 12v was dropping before it would charge it back up, took my Fluke and did a few tests. Too be honest it didn't drop really too far on most cases. What got me to thinking was that every time it needed a top off the 350v HV battery would come online and use a step down transformer to charge the 12v battery. I figured that there is nothing I can do for when I'm at work but if I can reduce how many cycles it goes through at the house its a bonus. The SLA battery works really well if you take care of them and while it's in the garage plugged into a trickle charger it's not cycling."Toto, I've a feeling we're not in Kansas anymore"
Batteries live longer in mild climates. Heat kills.
Then there is the issue of Vampire drain. What settings do people put their Tesla in (always on, power saving, etc). And what accessories do they have plugged in / hard wired (cell phone chargers, radar detectors, cameras, stereo equipment, etc).
Then there are driving habits (short trips to stores/work vs cross country vacations), day vs night, fast vs slow.
Even in 2013 there were people that didn't have an issue with the 12v if they hit all the usage/environmental factors just right.
I guarantee you there are still people that need something better than the SLA battery with no external smart charger. Switching to a more expensive LiFePo4 battery or sticking with an SLA and using a smart charger, either one probably fixes the issue for even the worst outliers.
Only a handful of people have a problem compared to the ones that don't. So that would indicate to me it's a problem with the individual users/batteries and not a systemic problem.
Same. I think it had something to do with total 12v load, higher is better for some reason. No raw data, just 120k miles over 2 cars.Is this still really an issue? I have 3 Teslas, one dating back to 2012, and have never replaced the 12v battery. Maybe Tesla has done it on the sly in the SC and not put the paperwork in?
Never had a single issue with any 12v battery.
Have you read Near annual replacement of 12V battery is typical according to Tesla Service Tech or do you just assume anyone not you is a handful that doesn't matter.
There are dozens of other threads like that. Since you don't have access to Tesla's data and I don't your argument comes down to I don't believe it until you prove it and my argument is I do believe it because of all the reported cases.
If that is your attitude we are at an impasse.
Yes, and that's a 3 year old thread.
Where have I said nothing is happening? You keep saying I've said this - please quote me where I've said this. You seem to have trouble understanding what you are reading. I'm sorry about that. I'm not sure how much more clear I can make it.
I'm saying read the messages in that thread that you complained is 3 years old and you will see numerous Tesla owners describing their recent replacements that occurred in 2017. You keep asking "Is it still an issue?", I point you to posts that say it is and somehow you complain that posts from 2017 are 3 years old.
If you can't read the posts from 2017 in that thread and gain knowledge from them you surely don't expect me to make cliffs notes for you?
Start at Near annual replacement of 12V battery is typical according to Tesla Service Tech post 361 and read until you get to the end of the thread if you truly want to know if this is still an issue.
Or at least acknowledge that your statements were self conflicting either: A. You didn't read the whole thread or B. it isn't 3 years old or C. don't reply further. Any way would have saved us the last few replies.
Thanks for encouraging me to read those posts starting at the beginning of 2017.
Out all those posts, there were exactly 2 people who had their battery replaced prematurely. 1 that was kind of iffy and wasn't clear on when/why it was replaced. There were several (3 or 4) that had it replaced at the 3 - 4 year mark, which is not unreasonable, and a number of people saying they have had zero problems, and finally, 1 person who clearly had a problem with the vehicle causing the battery to discharge.
So based off what I've read in that thread that pointed out, it would appear this is no longer an ongoing issue and the problems have been resolved going forward, just as I suspected.
Tesla has changed the battery type (to a DCS+), changed the hardware that charges the battery in the HV pack, and has also changed the charging algorithm, thus rendering this problem non-existent as a design issue.
Yeah and if you had done that to begin with we could have shaved how many wasted messages out of this loop?
OK so late 2016 or newer Tesla's maybe better at keeping a 12v happy by way of a change to the main HV pack. What makes you think there isn't still an issue with all the 2012 to 2016 cars that are pre change? Do you know about a recall campaign on all those cars that I haven't heard about?
Assuming that campaign doesn't exist, and hey what about all those out of warranty or soon to be out of warranty cars, doesn't it seem prudent for a Tesla owner that has the older setup to use a smart charger or buy a LiFePo battery (choose between the cost of time dealing with an external charger or money to make the problem go away)? Especially if they don't live near a Tesla Service Center.
I'm saying the DCS+ battery alone without the HV pack change isn't a fix. That's just a minor parts tweak. A welcome tweak, a small improvement, but not the root cause and so not the root fix.
I still live over 200 miles from a Tesla Service Center and I tend to buy used cars and/or keep cars past warranty. So to me this thread is about the big long term picture for all Teslas and knowing that some TLC is required to avoid the tow truck.
Car was built 10/14, traded 2 years later. I bought it 12/16, 12V battery warning happened 3/17 or so. SC told me there was no history of 12V replacement.When did you buy your CPO? 2.5 years is not an unheard of timeframe for replacement of 12v batteries. I've replaced many 12v batteries in ICE cars in that amount of time, some less. I've also had 12v batteries last for 6+ years in ICE cars. It's just luck of the draw as far as that goes.
The problem here is premature (I'd say 1 year or less) 12v battery replacements, followed by repeated replacements. A single replacement in 2.5 years is not indicative of a problem. If you've only replaced a battery once in your car, that's not a problem, that's just the battery lottery like any other car on the planet.
More likely, though, Tesla will correct the issue on the CPO servicing before they even sell the vehicle.