What Tesla WON'T Tell You About Your Battery

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Video details: A Tesla’s battery has been engineered to withstand the most extreme conditions and via a complex system of onboard computers and circuitry it has become the gold standard of EV battery technology in performance and longevity. In this video, we break down some fascinating findings on EV battery performance under the most intense temperatures and share with you the sweet spot for range and longevity. The findings might surprise you.

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[TesLatino]

When I was about 10 years old (40 years ago) I used to keep a few of my toy's batteries in a corner in our garage fridge because our elementary school teacher taught us the effect of cooling down the batteries for storage. This is def. one of my favorite subjects and you covered it great, Kim.

[hchchc]

Tire pressure can have a big impact on EV efficiency, so don't forget to check your EV's tire pressure in cold winter months! Remember the tire pressure decreases 1 PSI for every 10degF drop in temperature. For my Model 3 Long Range, I have observed 320Wh/mile efficiency with ~39 PSI tire pressure but a much better 280Wh/mile efficiency with ~45 PSI tire pressure. Tire pressure should be measured when they are cold.

[thdjjfsfh]

The material you cover is above and beyond what others cover. Thanks a lot, Kim.

[SCWgreg]

Kim, your battery discussions are some of the most thorough and spot on. So good to share with the community! Plus really love your new Intro!!! Thank you.

[corradogiorgio]

Another great video Kim, cold weather has always been a problem for batteries be it for a flashlight, or automobiles. When the battery is dead that is when you need a charge the one thing with a Tesla you can charge from home. We Canadians have found that after an overnight charge in mid-winter it helps with starting the charger again an hour or an hour half before leaving for work it helps not only with the charge by warming up the battery and recharging it. Especially if you leave you, Tesla, outside in winter where the average temp is -15c degrees 5F degrees and sometimes will go to -40c or -40F degrees can be brutal on the car battery.

[DaveBoxBG]

Wow, this has to be your best video so far! So much great information in one place!

[benjaminheindl]

Great video!
One small correction: resistive heating is actually close to 100% efficient. Basically, all the electricity flowing through the wire is converted to heat. It's just the fact that heating itself takes a huuuge amount of energy. Efficiency is not the problem here.
The effect of the heatpump is so great because it supplies you with "free" waste energy from the drivetrain etc., so the battery doesn't have to take the whole load of heating the car. 🤓🤓

[BillB]

Interesting presentation, here in Florida when temps hit 100 degrees F my E-Tron wh/mi goes way up. Same on the cool side. On the rare days we have 72 degrees F and no AC is required the car shows the lowest energy consumption.

[TheWhyGuyChannel]

Great vid. We live in a very cold area. We picked up an older Kia Soul ev with not-so-good range, but we still love it! If we can make things work while living in the country, then there's no excuse for city dwellers. We're saving for a model Y. To help our range when there's two of us... instead of turning on the cabin heater, we use a low wattage electric blanket that plugs into the cigarette lighter socket, and of course use the heated seats and steering wheel. We're a couple of comfortable pigs in a blanket and only turn on & off the defrost when needed. It's a HUGE help.

[Allan_A]

Hey Kim, the data is in line with what I've experienced in my Bolt EV. It's rated at 4 miles per kWh, but I get 2.9 in winter and somewhere between 4 and 4.5 in summer. Over a full year cycle and 40K miles, I've averaged almost exactly 4 miles per kWh in Minnesota!

[dfactor]

Interesting take. I put the ceramic particle heat blocking tint on my car (all windows except the sunroof) to reduce energy consumption for cooling the cabin. It blocks 98% of heat, which living in South Texas is a godsend. So far it has worked, even on 100 degree-plus days, I haven't had to set the temperature below 74 degrees, whereas before it would constantly be on the low setting.

[roberts.]

That’s a pretty good breakdown. I’ve always heard that the reduction in efficiency of batteries is a big deterrent, but it’s great to see the factual data.

[EngelUniverse]

Thanks for linking the studies under the video

[prestontucker]

Hard to keep warm with a glass roof. Focus should turn to insulation.

[aacosta]

First time I heard to leave your car plugged in even though it’s not actively charging. My Aug 2018 model 3 LR single motor with over 75k miles, parked outside, 35-105 degree weather, but only a couple of weeks at the extreme - battery health I think degraded over 10%. I wish I knew earlier to keep it plugged in. I’ll keep it plugged in now! Thank you!

[stayforever]

Fantastic breakdown! According to some of the range testing videos, speed also significantly impacts the range (70 mph vs. 60 mph). Hope this is resolved with an improved battery efficiency as well.

[erwinhun]

European here, appreciating the metric units.
Edit: Also, your seem to be an upcoming channel with ambition. From what I've seen so far you are going to do great.

[RayNLA]

Fun fact...The Nissan Leaf has used a heat pump since 2013
More fun facts..GM’s EV1 used a heat pump back in 1997

[michaelfink]

Great video, Kim. Lots of evidence-based information but delivered with an easy style. Keep up the good work.

[edwardd.]

Going to need a giant LI battery pack for the cybertrucks on Mars