How accurate is the Tessie app?

How long have you been letting it collect telemetry? If it’s only been a few weeks probably not super accurate, but if it’s been years it will be better You don’t need to go to Tesla to do the test, you can run the test yourself from the touch screen, if it says it’s less than 70% then schedule service

Run it down to 10% and charge up to 100%. It will tell how many kWh added then you can do the math.

Tessie was darn close to the Tesla battery health check on my car.

Tessie was rating my battery health at ~90% while the Tesla battery health was at 86%. Had Tessie since 1 month after I bought the car new in fall 2024. Battery health test done once ever 1 year and 5 months into ownership in the frigid cold.

Not very

Tessie app bad

Not long, I’ve had it before but cancelled subscription

Thanks for the reply 😊

I would just run the battery health test built into the car and go from there. I think it’s under service

The one that take like 12 hours, right?

Depends on the speed of the charger and the state of charge when you start

Got the mobile charger 32A at home

You mean 32A?

With the mobile charger at 32amps I would plan on close to 15 hours. For the fastest time you need to start the test as close to zero as possible. I plugged in and started mine at 3%, with a 30amp charger it took about 17 hours.

Thank you for the reply

That’s not great. On a LR from 2022 - if you full charge maxes out near 200 - that’s pretty dang low. I’d co firm by running a true health test, but may be better to wait until it shows under 70 which is what Tesla would require. Sounds like a new battery is coming under warranty.

Hopefully!!

Don't know but I would recommend you join [https://www.recurrentauto.com/](https://www.recurrentauto.com/) It's free and they have a very large database of EV's to compare

Tessie will drain your battery significantly

Yea I’m just doing it for the free trial again, going to run the battery test this weekend and compare numbers

Not rejecting your claim but genuinely asking, where did you get this information from? First I've heard of it

To get data, it will consistently ping the vehicle to get the most up to date information. This will keep it awake and use traditionally more power than averagely consumed. Some dont care about the range difference but it is important to keep in mind.

Okay thanks, I know already of the pinging but I guess the "significantly" part caught my eye, regardless my subscription has been inactive for a while now

I would like to understand how this works for recurrent. I have seen my battery health go from 98 to 88 in 1-2 months. I ran battery health test at it is 95%

My Tessie that had like 4 months of data was really close to the percentage the Tesla battery health test said

Tessie doesn't wake my car up like you're suggesting. It only does that when you interact with it for certain functions, just like the regular Tesla app.

Yea I’ve been using Tessie for years and it does not drain battery at all.

Sure

Have you run the official battery health check? Interesting to see how they compare.

That’s pretty impressive. I beat my car to hell for past 4.5 years could only get it down to 83%

Tessie is super INACCURATE to determine nominal capacity. If I remember correctly, model y 2022 LR in USA uses 82.1kWh pack. Aka nominal capacity 82.1 and that's what you should find in EPA docs. So your degradation is much higher than 30%. Scan my Tesla should show you the full info. Also remember that the battery test of Tesla underestimates degradation by 1-3%. Your degradation seems to be around 33-35%.

Thank you for this! I knew my shit was off, my efficiency is also DOGSHIT even going 65 my average is around 330 killowatt hour since I’ve had the car.

Happy Cake day🥲

mine is pretty damn accurate, IDK how I ended up here, I drive a 2018 m3 LR at 124k miles, 83.34% battery health, and what tesla says, its at 84%.

Could be your tires. 330 pretty normal at 65-70 speeds or in traffic on main roads. I’ve gotten down to 220 average but top speed was prob in the 50-55mph

Got the Hankook ion SUV

How long have you’ve used the Tessie app?

Curious about how you manage to fuck up the battery so badly?

Spank u :)

Honestly I don’t think it was me, mostly just a bad battery. It happens. I did drive it a lot. From the getco my range was horrible but I charged at home mostly.

Compared to countless YouTube videos and their range tests and wheels I wasn’t getting anything they posted

Are they inflated properly? Are you flooring it everywhere? What is your average speed?

Yes**, I have a portable air compressor , I drive normally, 60-75, I’m looking at my trips right now and sitting at 18,000 miles, 320 average Wh/mile

60-75 is part of the reason the EPA highway is slower than that. Are the wheel bearings good? In my 3 I had one replaced and that helped some with my efficiency.

I wouldn’t know, I mean I rotate my tires at discount tires every 5k miles. I’m sure they would have mentioned to me they were going bad. I’d have to take deeper look into it

They wouldn’t know or care because they can’t fix it. There are a few locations the can do alignments but that’s about as deep as they go for mechanical work.

Since November now

Don't run the battery health so often. To do it you have to charge to 100% and discharge to nearly 0 so that stresses the battery a lot. You are making it worse. The numbers are pretty meaningless anyway unless your range goes way south and you can show Tesla you are below 80% for the warranty. If you start using best practices for charging your numbers should improve. You'll also see more range as the weather improves. Regarding recurrent, go to their website and you can read how they do it. Its just data collected from your car as you drive and charge compared to a massive database of similar cars. Since it is not running any health tests its not damaging your battery. You'll get a monthly report and see how your car compares.

join [https://www.recurrentauto.com/](https://www.recurrentauto.com/) to get their battery reports monthly. It's free and does not run any tests that stress your battery. It's only based on telemetry from your car.

330KW hours at 65 miles per hour is not normal if you Are not climbing hills or mountains and the weather is mild, not real cold Not pushing against wind rain or snow. I run about 250 kilowatts under those conditions. Unless I'm preconditioning the battery while driving. One thing that can really mess up your numbers is cold weather preconditioning of the battery and the way that tesla accounts for it which I think is wrong way wrong. I knew this because I ran into somebody who had conducted some pretty detailed tests and then I confirmed it on my own with my charging equipment. At home I use an Emporia charger which keeps very good records of the energy used no matter what the car is doing with it. I compare that to the charge stats you get in the car and on the Tesla app and there are some huge differences all due to how preconditioning of the battery is accounted. Make sure before you leave your home on your daily commute or any trip that you precondition the battery beforehand with the charger plugged in but your battery already full To the normal level you charge Daily such as 80%. This will give you the most accurate results in your charge stats without battery preconditioning messing things up too much. Here's why I am warning about this and why I think Tesla accounts for the kilowatt hours used in battery preconditioning wrong. Battery preconditioning kilowatt hours used is not charging the battery and should be accounted for separately under all conditions but Tesla doesn't do that. If the car is plugged into a charger during battery conditioning but you are not also charging the battery The kilowatt hours are not counted under your charge stats. On the other hand if you are charging the battery at the same time then all kilowatt hours go against your charge stats, the preconditioning kilowatt hours are not separated out but are included and this throws off how many kilowatt hours you think you've used to charge the battery. Now if you're driving the car and start navigating to a supercharger and the car starts to precondition the battery those kilowatt hours also are added in and make it look like your car is less efficient per mile then it really is. You can see this interactively by looking at the charging graph and you can usually see at least a 100 kilowatt jump as soon as preconditioning starts.

I live in San Diego, weather is perfect here year round, I only pre condition when I’m planning to supercharge . I just don’t know what else to do, thinking about switching to 19s inch wheels but honestly feel my cars battery is just over using energy. Even if I go to Tesla and they tell me my retention is still above 70, something is still off

Even very moderately cool temperatures can cause the car to use energy to heat the battery to normal operating temperatures during a morning commute. Have you never seen the little green wheel warning that regenerative braking is low due to a cold battery? If nothing else but to eliminate this is a factor causing your high energy use I would start using the app to schedule preconditioning the car before you leave for your morning commute each day. Be sure that the car is fully charged before the preconditioning starts as I outlined above. If the car is just not operating efficiently that extra energy being used has got to be going somewhere most likely in the form of wasted Heat. Try driving the car on the highway for about an hour and then go around and feel each wheel with your hand for excess Heat. This will tell you if any of your brakes are dragging or if a wheel bearing is going bad. If you can't find anything yourself then I wouldn't hesitate to put in a service call to Tesla since the car is under warranty. They can do a lot with remote Diagnostics without you even bringing the car in. They can remotely check your battery for efficiency and degradation and even run some Diagnostics on the motor drive units.

I will set an appointment tomorrow thank you for the input I really appreciate it :)

Just wondering how you made out. Did Tesla find anything wrong?