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  • The final cut of TMC Podcast #29 is available now with topics time-stamped. We discussed the Tesla Cybertruck's expected 1 MW Ultra-Fast Charging capability, the Tesla Semi Delivery Event, the coming Model 3 refresh (project "Highland"), and more. You can watch it now on YouTube.

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  1. R

    Can someone explain this sentence from the owner's manual regarding the battery

    What Tesla is telling you is NOT to continue with the typical ICE regimen of fill-it-up-and-drain-it-down. Depth of Discharge (DoD) is one of the factors that affects battery health and longevity. Shallower charge-discharge-charge cycles are much preferred over deeper cycles. If at all...
  2. R

    Used 6% to pre-condition

    "Risk" depends upon how hard you accelerate, how fast you drive, at what pack temp, and for how long before the pack is warmed. What will happen to someone who drives a lot with a cold pack? They'll see more rapid deterioration of their pack than they would otherwise. Whether that's important...
  3. R

    Used 6% to pre-condition

    If one's concern is only how many kWh's are consumed, then heating the cabin is certainly an option that can be thrown to the curb. But it's a more complicated story than that. Lithium plating is arguably the worst phenomenon that faces EV drivers. And Lithium plating accelerates...
  4. R

    Displayed Range, Watts/Mile, Calculated Battery Capacity on 2021/2022 Model 3s

    There's simply no way around that if we're going to use our car, we can't avoid any number of things that, on their own, aren't great for the car's battery. Like Supercharging. Or charging to high SOC's. Or driving when it's cold. Or driving when it's hot. But you raise a great question...
  5. R

    Testing the health of 12v battery?

    If your 12v battery is of the older, sealed lead acid family, testing it is fairly straightforward. There are many good testers available at reasonable price that allow you to put a load on the battery and get a gauge of its health. The better testers will also measure internal plate...
  6. R

    2022 M3LR Insufficient Regen After Preconditioning

    Roger that, @GtiMart. You are correct! Hold that thought. I need one more cold morning to check something.
  7. R

    2022 M3LR Insufficient Regen After Preconditioning

    Interesting results there, @GtiMart. Thanks for running that test. Looks like Tesla makes a distinction between behaviors of driver-is-in-the-seat vs. just-got-remote-signalled-via-the-app-to-precondition. In any case, the context for preconditioning is that the driver is NOT in the seat...
  8. R

    2022 M3LR Insufficient Regen After Preconditioning

    What I can say is that on a 2022 Model 3 LR AWD, running 2022.40.4.1, ambient temp of 30F, and a cold-soaked pack at 37.4F... heating the cabin most emphatically does NOT heat the battery. Front and rear stators remain quiescent and pack temp does not change, even as the cabin warms. As soon...
  9. R

    2022 M3LR Insufficient Regen After Preconditioning

    Simply turning Climate on will not pre-heat the battery. Your cabin will be nice and toasty, but your pack is still cold as ice. The only way I know to actually pre-heat the battery is to go into Scheduled Departure and activate the "Precondition" button (along with an appropriate departure...
  10. R

    Insufficient grounding with metal conduit

    @Olle, you can't test the quality of a ground system with a multimeter. If it were that simple, Fluke would never sell any of those multi-thousand dollar meters that were included in that earlier link of yours. Not that testing individual outlets isn't important - that's in fact what I...
  11. R

    Pre-conditioning in route to supercharger

    Well, I don't think Tesla, good as they are, has found away around the law of Conservation of Energy. So magic probably ain't it. There are a bunch of things on a Tesla which influence pack temps. Watching energy usage from the stator(s) makes sense, since waste heat from those is the...
  12. R

    Longer to charge at home in colder weather?

    Yes, my statement was based upon repeated observations of pack temps (albeit, during warmer weather). Frankly, I was quite surprised the first time I observed that behavior. Like most people, I assumed that if the car said it was pre-heating the battery while navigating towards a...
  13. R

    Longer to charge at home in colder weather?

    What you'll find is that the "preconditioning" alert while navigating to a SuperCharger is not a reliable indicator of whether the car is actually sending heat to the pack or not. Typically, once you get closer - in some cases, much closer - to the SC, it will begin to heat the cells. Congrats...
  14. R

    Insufficient grounding with metal conduit

    Unfortunately, establishing a good ground is a bit more complicated than tightening down all connections. And creating a ground system at a residence that is anywhere close to 5 Ohms isn't practical. That spec for <5 Ohms is for things like communications sites, like cell towers, and typically...
  15. R

    Car sleeping for 1 min, then idling for 11.

    He mentioned he still has a "widget" on his phone. I'd start with making sure that's disconnected!
  16. R

    Car sleeping for 1 min, then idling for 11.

    2022.36.x was the release where a number of people reported issues with suddenly increased phantom drain. I'm not sure if those issues were resolved in 2022.36.4 or 2022.36.5... or if it wasn't until 2022.40.x. But somewhere in there we stopped seeing all those reports. So if it's a software...
  17. R

    Car sleeping for 1 min, then idling for 11.

    What software release are you on? Excessive phantom drain is almost always caused by something the user is doing - Sentry Mode, Cabin Overheat Protection, frequently checking their mobile app, etc. And oftentimes it's because the user has installed one or more third-party apps (which keep...
  18. R

    Read battery temperature & voltage from different its cell/module on a Model 3 's CANBUS?

    Yes, the Model 3 reports individual voltage on each of its 96 cells across the CanBus. I don't believe - I don't recollect seeing this, so could be wrong - it reports individual cell temps, though it reports minimum, maximum, and average of the population. (To be clear, it's possible the car...
  19. R

    Car sleeping for 1 min, then idling for 11.

    Have you ever installed a third-party app? If so, change the password on your Tesla account.
  20. R

    PCS_a052 Error when trying to charge on 110V at home

    You're wrangling with pretty much the worst-case charging solution for an EV that exists. 120v circuit with an extension cord. 120v can work, kinda sorta, but it pretty much requires an ideal setup. In your case, you're going to have some voltage sag because of the extension cord (in...
  21. R

    Long term storage & high ambient temperatures

    I don't have a suggestion for your airport parking... but just to add a little context, pretty much anyone who parks their vehicle in the sun, even for a few hours, is going to see similar high battery temps during the summer. So your situation is far from unique. Your car's battery will...
  22. R

    CCS with bundle of wires won't go over 50kW even on 250kw SC [resolved with longer battery pre conditioning]

    If you'll read pack temps directly off the sensors you'll find that the car's temperature behavior doesn't always follow what the car's display is seemingly telling you. My observations are that when driven in moderate-to-hot ambient temps, the pack temp will generally stabilize (stop climbing...
  23. R

    OEM Tire Life Expectancy?

    Just passed 10,000 miles on my 2022 AWD Model 3. Per the maintenance interval spec, I took an hour yesterday and rotated the tires for the first time. Just curious... what kind of tire life should I expect? The OEM tires are a Michelin "Green," whatever that means. 18" wheels. Tire size...
  24. R

    2022.36 — Official Release Notes and Discussion

    Just a single data point... I'm on 2022.36.5 as of today. That release installed on 10/22/2022. No delay in downloading or installing. Just the typical 20-25 minutes that I've seen on every one of the 21 software updates I've had since picking up the car last March. My internet at my car is...
  25. R

    Keeping My Car Plugged In Charges It On And Off Throughout The Day. Is This Good?

    Depth of discharge is also a factor in Lithium-ion battery degradation. The typical ICE routine of periodically filling up, drawing down fuel over a few days, then filling up again when you're down to 1/4 tank isn't optimum for EV pack health.
  26. R

    2021 LR dropped 82% for 47 kWh? [sentry mode on]

    The updated Energy app delivered in 2022.36.x neatly tabulates all energy usage. Works a peach!
  27. R

    Wow, 36.5 is out

    Our Tesla's are far more like iPhones with wheels than they are like traditional, what-they-built-at-the-factory-is-what-you-get cars. And since any complex software always has bugs, waiting for "everything to be fixed" is a never-to-be-achieved fantasy. New bugs will be created even as old...
  28. R

    Update 2022.36.2 battery usage [sentry and cabin overheat protection are on]

    FYI, 2022.36.2 has a bug whereby it fails to ignore Sentry Mode at those locations (Home, Work, etc.) where it can be directed to do so. That doesn't directly affect you (OP), since you note that you keep Sentry Mode on at work. But since the bug involves the behavior of Sentry Mode, it would...
  29. R

    Why my new 12v Battery dead after 3 weeks.

    Why a new 12v battery would fail that quickly is hard to say. It certainly shouldn't. First question I'd have is the source where you purchased the battery. Online? A local shop? And if it was local, was it a place that specializes in automotive parts? Who installed it? All that relates...
  30. R

    2022.36 — Official Release Notes and Discussion

    I'm really liking 2022.36.2. Dropped a number of cool features on us. I especially like the enhanced Energy app. One bug of note in my 2022 Model 3 is that Sentry Mode is not ignored at Home. I was out blowing leaves near my car and Sentry Mode triggered. "No worries." I figured the update...
  31. R

    Using Lower Half Of Battery

    LOL. @KenC is definitely rocking that pack of his!
  32. R

    OEM CCS adapter now available to order in North America, Retrofit for older cars coming in 2023

    LOL. No, although I get that sometimes. :cool: You gotta use another vowel…
  33. R

    New Zealand charging experience

    Roger that. No doubt NZ has its own electrical regulations. I was speaking more to the physics of electrical delivery, than regulation. "Continuous, sustained load" is going to behave the same everywhere in the world. I view that 80% usable as a physical property that NEC has simply observed...
  34. R

    New Zealand charging experience

    A 15-amp circuit, which equates to a 12-amp continuous load, is far from ideal. But it should work just fine since NZ is on a 230v standard. Just a bit slower than a higher amperage circuit would be. I have my Tesla Wall Charger connected to a 240v/20-amp circuit, which gives me 16 amps. I'd...
  35. R

    Using Lower Half Of Battery

    There's a very long thread on the forum here (How I Recovered Half of my Battery's Lost Capacity) which discusses the whole question of charging patterns and how they affect both real pack capacity and capacity as reported via the BMS. As you might expect, most of the sources for the...
  36. R

    Am I Supposed To Be Getting Better Range Than This?

    Lots of up and downs. That's what you'd expect with a trip like that. Short trips like a trip to your local school aren't going to tell you much. You're stopping and starting and accelerating from low speeds... actions which consume great gulps of energy. And, yes, if your normal use of the...
  37. R

    Using Lower Half Of Battery

    Your new charging regimen is much healthier for your pack than your old charging habit.
  38. R

    Am I Supposed To Be Getting Better Range Than This?

    The 400+ Wh/mi over the last 4-5 miles is much, much too small a sample distance to draw any conclusions from. If you had a way to observe actual power output on a moment-by-moment basis, you'd see an astonishing variety, bouncing all over the place. You'd suddenly see that 1% grade on that...
  39. R

    OEM CCS adapter now available to order in North America, Retrofit for older cars coming in 2023

    There's no doubt that a major reason for Tesla's pre-heating of your battery while en-route to a Supercharger is to promote faster charge sessions, improving the user experience and getting you out of the stall as quickly as possible so it's free for the next person. But it's also true that the...
  40. R

    OEM CCS adapter now available to order in North America, Retrofit for older cars coming in 2023

    UPS dropped off my CCS adapter today. I had previously set up an account with Electrify America, but have never stopped there. Figured I ought to test it. Unlike Tesla's Supercharger network, which knows instantly who you are when you plug in and just automatically bills the card you've got...
  41. R

    LFP Battery SOC vs DOD and finding a balance

    All rechargeable batteries have an inherent useful life, typically stated in full cycles from 100% SOC to 0% SOC. Extending my earlier example of a 20% daily battery consumption, someone who charged their car to 100% and then let it slowly bleed down to 0% before recharging would consume one...
  42. R

    Concerning battery degradation [question about warranty]

    Could not agree more. Since the OP has access to his/her CanBus data, I'll just point out that the car collects and stores data that is much more useful for evaluating battery health than any over-the-road test could ever be.
  43. R

    LFP Battery SOC vs DOD and finding a balance

    Great question. Much of what we might do to preserve pack life involves balancing competing elements such as this. Although the general rule of thumb with SOC is that lower is almost always better, it's also true that it's the very upper end that causes the most cell stress. If someone was...
  44. R

    Concerning battery degradation [question about warranty]

    Beyond what's already been said, I'll just add that the degradation you (the OP) have experienced to date will probably be leveling out soon, if it hasn't already. There's also a hint that your charging habits may not have been your friend. Notwithstanding how cool road trips in an EV are, and...
  45. R

    Inadequate Outlet Grounding - umc_a001

    Not all "grounds" are created equal. Part of that relates to things like the inherent soil resistivity at your home, moisture, temperature, building design - things you can't control. But part of it has to do with wiring/infrastructure topology, quality of materials used (wire, connectors...
  46. R

    Battery drain after 2022.24.8 Software update?

    Belay this earlier post of mine. I just awakened my car - not driven and not plugged in over the last 24 hours - and it's still at 56%... did not drop any. It's probably worth reiterating that cabin temp, as reported in the car or via the mobile app, is a "coarse" measurement. Rounded up or...
  47. R

    Battery drain after 2022.24.8 Software update?

    My original reason for wanting Cabin Overheat Protection was because the Owner's Manual suggests that when HVAC cooling is triggered, it also cools the battery (under Climate Control Operating Tips: "In addition to cooling the interior, the air conditioning compressor also cools the Battery.")...
  48. R

    Battery drain after 2022.24.8 Software update?

    FWIW, I updated to 2022.24.8 a day ago on my 2022 Model 3. After seeing this thread, I just awakened my car and found it has dropped two percent (from 58% to 56%) over about 12-14 hours. That's unusually high for me (for reference, a week ago I was away on a motorcycle trip and left my Model 3...
  49. R

    Wall charger not opening Charging port door on M3 LR

    You can also awaken your car via the remote app on your phone. Just open the app and it will awaken the car (sometimes takes a minute).
  50. R

    Cabin Overheat Protection v. Off Peak Charge

    I wouldn't jump to the conclusion that COP is the cause of your unexplained electric usage. My car spends several hours a day out in direct sun (no garage) and routinely triggers COP during the summer. I can't say that I can tell when COP fires up and when it doesn't (a cloudy day, for...

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