Heat pump test of 2021 Model 3 vs 2019 Model 3

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Bjørn Nyland

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Kommentarer
Steven Michael
Steven Michael 18 dager siden
Both cars would use somewhat more energy to heat the cabin, while driving at speed compared to sitting in the driveway, due to "wind chill factor". Thanks - great video!
Christian S.
Christian S. Måned siden
Great video, did you turn the AC in your test on or off for your car? Did you mean that the AC consumpts 1 kW? And if you turn it off the ptc heater draws 1kW? This might result in a lower consumption difference between the cars and we should use manual Mode in old Model3 to turn off the AC, right?
In eMotion
In eMotion Måned siden
the test is not perfect. When you drive the car use the heat from the motor and this effect reduce the amount of the ptc. In practice the difference is smaller. Some cars like the ID3 have no effect with the heat pump. These are the result of a test from YT-channel nextmove in Germany.
In eMotion
In eMotion Måned siden
Bjørn Nyland thanks 🙏
Bjørn Nyland
Bjørn Nyland Måned siden
Incorrect. Old Model 3 can't use the heat from motors to heat up the cabin. It can only heat up the battery. It's an old misconception that Tesla can do that. But the latest Model 3 and Y can do that with the octovalve.
The Zealot Rusher
The Zealot Rusher Måned siden
ty
FATTOLDGUY
FATTOLDGUY Måned siden
The outcome should not surprise. Modern heat pumps for space heating at home are about %350 efficient. The best resistance heater approaches %100. Hence, three times better is about right for the new system
Nate Hill
Nate Hill Måned siden
Since a heat pump == (air conditioner + reversing valve), I dont see why ALL eCars dont have them. What does a reversing valve cost in quantity? $17 including engineering, software and wiring? I was VERY disappointed in my Volt not having it, cause it means I basically dont get to see out my windshield between October and April without bundling up (like Bjorn should be in Norway but doesnt seem to).
Filip Bjurling
Filip Bjurling Måned siden
I thought the new car had 82 kWh instead of 75 kWh? You should have used km instead of percentage. Then you could have gotten more accurate readings. by taking the km and divided it by the km when fully charged. Now 3 % could have been everything from 2,2 % to 3,8 %.
Bjørn Nyland
Bjørn Nyland Måned siden
So it means about 700 W. That corresponds with 600 W measured in today's video (one human inside the car generates about 80-100 W of heat): nopost.info/throw/ktLOjWKS2K2Uk7c/video
Bjørn Nyland
Bjørn Nyland Måned siden
Turns out that it has 70 kWh net capacity.
tomasz zajac
tomasz zajac Måned siden
Can i add head pump to my tesla 3/2019 ?
Bjørn Nyland
Bjørn Nyland Måned siden
No.
CablebobTube
CablebobTube Måned siden
The new car has older software with screen saver.. you have an update pending for the new car..
Bjørn Nyland
Bjørn Nyland Måned siden
nopost.info/throw/ucWVnXvImJ2bfs0/video
Ron Sun
Ron Sun Måned siden
Which Model 3 would you buy if you were a sales representative? China 2020 or USA 2020
Torrel
Torrel Måned siden
The older one will have a very minor advantage being boxed between the house and the new car. But I'm sure it won't matter too much
Bjørn Nyland
Bjørn Nyland Måned siden
It's irrelevant.
Sergy
Sergy Måned siden
you need 2 phones flor 2 Autos ;)?
Σigma π
Σigma π Måned siden
Shouldn't the motor's heat be sufficient at highway speed? 2 kW is only 10 % of 20 kW driving power. Even electric motors and inverters have some losses. But maybe the heat demand increases drastically when there is a 100 km/h airstream around it.
Phux
Phux Måned siden
@Bjørn, what's that stripe underneath your front licence plate?
Bjørn Nyland
Bjørn Nyland Måned siden
nopost.info/throw/38mmi5eWuah6gK8/video
Diogo Santo
Diogo Santo Måned siden
Its the “Yo what’s up!!!” for me
Tekin Bozbey
Tekin Bozbey Måned siden
If the front radiator is dirty or blocked of mud, the heat pump loose it's efficiency and spends more electric. Please check that and let us know about result.
bartwaggoner2000
bartwaggoner2000 Måned siden
Does the heat pump tech come from their SpaceX work?
Στέφανος Κόκκαλης
Στέφανος Κόκκαλης Måned siden
This test is incorrect, actual temp inside the car is missing, old should be way higher , please discontinue.
Στέφανος Κόκκαλης
Στέφανος Κόκκαλης Måned siden
@Bjørn Nyland how fast the humidity from e.g.90% goes to 33%? As well as the temperature rises from 3c to 24c, aka the quality of heating is comprised? Can you quickly heat up while you sort charge? Does also heating the battery by pulling 1,5kw ? Just thinking that all is marketing.
Bjørn Nyland
Bjørn Nyland Måned siden
It might be flawed, but even if temperature was corrected, the old Model 3 would still pull about 1.5 kW.
CED99
CED99 Måned siden
Has the new Tesla Model 3 not got an 82 kWh battery?
Bjørn Nyland
Bjørn Nyland Måned siden
No
Alioune Ba
Alioune Ba Måned siden
I am wondering what will be the long run maintenance cost of the heat pump and all the added complexity : octavalve and so on ... does it really worth It?
13aker0
13aker0 Måned siden
Thissssssss issss... oops wrong channel
Bob About
Bob About Måned siden
An informative video as always. You made two comments that are interesting. First, you have some battery degradation and then you are waiting for a fat (I guess larger) battery option to become available. Heat pump seems to be the solution as EVs evolve. If you don't mind some no questions: what distance have you driven and how much degradation. I'm in the UK and I ask because I will Change in 1 year or maybe 2 to an EV and consider Model 3, model Y or iD 4 large battery if possible. I drive 50,000 km / year and keep a car for 3 to 4 years. What is you motive to go for a fat battery? Norway seems to have a better charging network Tesla and others than the U.K. and I feel my option need is to get a reliable, the most efficient, longest range vehicle with a reachable price.
brian cuthbert
brian cuthbert Måned siden
Is their a difference if the (auto) uses the the AC and if it doesn’t?
allenfazer
allenfazer Måned siden
What real world range should I expect from a 2021 model 3 standard range plus? Thank you
antonio volpe
antonio volpe Måned siden
Freaking Christmas
Aurora Borealis (LIVE!)
Aurora Borealis (LIVE!) Måned siden
I'm sleeping in my Niro EV now in Lapland, -3°C. Climate is running at a steady 0.69kw. Temp set to 20°C and AUTO.
David Hebert
David Hebert Måned siden
With the heat pump in the new model 3 from what I understand won't run the stator for battery heater. It will use the heat pump as well to pre heat the battery??
David Hebert
David Hebert Måned siden
Thanks i will watch that when I have time, I can't remember the video I watched with the description on the model Y it was a 3 part video but not real life. Just the modes of the system.
Bjørn Nyland
Bjørn Nyland Måned siden
nopost.info/throw/rc_VrK6u24yDnbM/video
Eagles_Eye
Eagles_Eye Måned siden
I wish I had atleast one of those cars, cmon Elon. Make a Star Trek like replicator already so you can print tesla cars for “free”
Alexis de Wouters
Alexis de Wouters Måned siden
Do you think the M3s made in Berlin will also have the new cells ? 2022 will be the year for replacing my old ICE :)
Paul Gracey
Paul Gracey Måned siden
one point of comparison you may not have considered using the cabin heater also pulls air through the cabin filters I think. If MC Hammer's filters are older, as it seems they would be, there may be more energy consumed in circulation. Also circulation mode should be on in both cars, but I assume you Norwegians all do that anyhow. In So. California I am happy enough to have my old Tesla M3 without the heat pump. Seat heaters are often more than enough for our winters.
Bjørn Nyland
Bjørn Nyland Måned siden
My filters are brand new. Check out my channel.
Mark P
Mark P Måned siden
Does the double glazing add thermal insulation also?
Beakerzor
Beakerzor Måned siden
there's no such thing as a "2021" model
Bjørn Nyland
Bjørn Nyland Måned siden
It is.
pAVL
pAVL Måned siden
6:23 😂
Peter Pan
Peter Pan Måned siden
Ok; now the real test at -20oC; when range/battery consumption really matters.
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
TRY to HELP you
TRY to HELP you Måned siden
checks out. the new one extracts hear from the outside air by having the system evaporate through the exterior coil to a colder temp than outside, outside air goes through and warms up the exterior coil... goes back in the car, compresses and then exchanges the heat inside.
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
Neil French
Neil French Måned siden
Can't be a new Tesla without it having a fault.
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
Matthias Fritz
Matthias Fritz Måned siden
Are both cars heating up at the same speed?
DMarci
DMarci Måned siden
5:57 when you opened scan my tesla, it showed 2236 kWh Energy usage for a moment, before it reset to 0.
Bjørn Nyland
Bjørn Nyland Måned siden
That's because I have been moving the app between cars.
Tom55data
Tom55data Måned siden
The 3 times difference of energy usage by heating is to be "expected" for a heat pump as 3-4 multiplier is normal realistic heat pump efficiency. The theoretical limit is 7x. Can you comment yet on the minimum working temperature for the heat pumps on cars please.
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
Dejan IMP
Dejan IMP Måned siden
Tnx
tegelsten1
tegelsten1 Måned siden
Is the heatpump used for both AC and heat? in that case they can't run both ways at the same time
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
Andreas Burgholzer
Andreas Burgholzer Måned siden
You can't compare when the A/C is on and in the other car off! Why did you not turn off the A/C in MC Hammer? A/C is the fridge for summer temperatures! I do not understand why it's automatically turned on, when It's colder inside the car as the temperature setting value on display.
Andreas Burgholzer
Andreas Burgholzer Måned siden
@Bjørn Nyland then it is no correct comparison.
Bjørn Nyland
Bjørn Nyland Måned siden
Nope. Both cars should run on auto.
Andreas Burgholzer
Andreas Burgholzer Måned siden
@Bjørn Nyland Yes, I know, both were on auto. But you can see, that in MC Hammer the A/C is on(3:13) in "auto" mode. And in the new car with heat pump, A/C is off (2:20) in "auto" mode. Turn off A/C in MC Hammer explicitly and then compare the energy consumption.
Bjørn Nyland
Bjørn Nyland Måned siden
Both cars were on auto. You missed that detail.
Philip K
Philip K Måned siden
Explanation for the AC button being disabled: this is a known downside of the heatpump, it can run either as AC (cooling) or heating, but not both simultaneously. Running the heater and AC simultaneously allows dehumidifying the incoming air very quickly, which can be useful in some (very humid) conditions. This is a common feature on most cars. I’ve noticed this limitation as well in my old ZOE (which also has a heatpump). The question here would be: do the new Model 3/Y also have auxiliary PTC heaters in addition to the HP?
Délio Jesus
Délio Jesus Måned siden
Remember also, the double glazing windows provide extra insulation, therefore less heat loss, adding to the total efficiency.
Matthias Fritz
Matthias Fritz Måned siden
You lose those most heat through the roof.
Délio Jesus
Délio Jesus Måned siden
@Bjørn Nyland true, good point. I thought they had double glazed all 4 windows. Did you felt a considerable difference in noise reduction?
Bjørn Nyland
Bjørn Nyland Måned siden
It's just two front side windows. Barely any difference when the remaining 90 % is not double.
Schunkelnde Dschunke
Schunkelnde Dschunke Måned siden
Oh, Bjorn want a Tesla with heat pump. Next Tesla for Bjorn...MY build in Brandenburg.👍
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
mravecsk1
mravecsk1 Måned siden
Just found it on Teslarati....nice :)
Bořivoj Kůla
Bořivoj Kůla Måned siden
Hervorragende Analyse
Lexi The Lexus
Lexi The Lexus Måned siden
I really like the videos that when he does these test!
Dan W
Dan W Måned siden
How was the difference in noise between the two? And could consider testing to see how much more quickly one heats up the car versus the other?
Nic Berry
Nic Berry Måned siden
Autotuned "Whaaat???" at 6:30
Kyle Le Dot Net
Kyle Le Dot Net Måned siden
Yo whats up!
Emmett
Emmett Måned siden
4pm and its dark? Ouch
Mariusz Kozłowski
Mariusz Kozłowski Måned siden
Same in Poland
Bjørn Nyland
Bjørn Nyland Måned siden
Welcome to Norway.
Kristoffer Sandven
Kristoffer Sandven Måned siden
Could it be that the new car has better insulation? If so, you might get less heat leaking and thus the heater needs to use less power? Doesn’t account for all of the difference, but it might be a factor?
Kristoffer Sandven
Kristoffer Sandven Måned siden
@Bjørn Nyland Of course! #fellownorwegian
Bjørn Nyland
Bjørn Nyland Måned siden
Could be. But there's no denial that heat pump is way more efficient than PTC. You know that, right? Norwegians use heat pumps to heat houses in Norway.
Graham Sutton
Graham Sutton Måned siden
Bjorn provides the nerd level details, I can judge the capabilities and characteristics of car and manufacturer design choices, cuts all the BS.
brian cuthbert
brian cuthbert Måned siden
U spent 10% because u had the AC button actually on.... On the 2021 u did not have the AC on... That’s that. Thumbs down for me
Bjørn Nyland
Bjørn Nyland Måned siden
You failed to understand that I used auto mode. Thumbs down from me on your comment.
Gabriel Landau
Gabriel Landau Måned siden
Thank you for all your hard work Bjorn. When you have time, please test the charging curve while supercharging. This test on the 2021 yielded poor results: nopost.info/throw/26y6pobalIximMk/video
scotathon
scotathon Måned siden
Would the double-pane glass help with heat retention? Maybe if you measured the surface of the glass on the outside that would be some indication of heat loss?
Bjørn Nyland
Bjørn Nyland Måned siden
Hardly. Remember that the remaining 90 % of the glass is not double.
Mark Brand
Mark Brand Måned siden
I'm sure it would help but not a ton I don't think.
CoolSilver
CoolSilver Måned siden
I didn't know Camp Mode was updated to blank out. That's so nice. I may actually camp again. Last time I just set to keep climate on and turned off security alarm.
Charlie Devine
Charlie Devine Måned siden
You should test the heat pump at -10 C.
Erik Meike
Erik Meike Måned siden
I would be interested to see how the interior humidity compares between the two cars. If you calculate dew point, you could probably figure out if it is actively dehumidifying the outdoor air in the older car. I would be also interested in knowing how close to 21C the air is inside the car for these and also other cars you review, but that can be extremely hard to measure since at least the nicer cars attempt to optimize for your skin perception and not actual air temperature.
rtechnik
rtechnik Måned siden
I understand the "heat-pump" and the "AC compressor" is the same thing. At least that's the case with a "reversible" AC at home. So clearly you cannot heat and cool the same time . I wonder if you have more moisture in the interior because of this. I have another car (apart from my Model 3) which you cannot drive in winter without AC as it fogs up right away.
kjh789az
kjh789az Måned siden
Great data as usual. Thanks for doing this heat pump v. old style heater comparison I requested after the previous video. Good sheeet!
Marcel Silveira
Marcel Silveira Måned siden
“Yo, what’s up?” is my favorite part of the video. Make a shirt with the saying on it.
Heinrich Peter Maria Radojewski Schäfer Leverkusen
Heinrich Peter Maria Radojewski Schäfer Leverkusen Måned siden
Wie kommt es, dass du so gut Deutsch sprichst?
jdesmo1
jdesmo1 Måned siden
Your OBD device is consuming noticeable power in one car and not the other
Bjørn Nyland
Bjørn Nyland Måned siden
Incorrect. It uses less than 1 W.
F C
F C Måned siden
How are the headlights compared to older Model 3s?
Rodney1234 Parkes
Rodney1234 Parkes Måned siden
Helpful video. Are the mood lights standard or have you retrofitted them?
EVMANVSGAS
EVMANVSGAS Måned siden
Bjorn, I know these are both on AUTO but the heat pump model 3 at 2:09 the A/C is not lit up in blue, then when you are in your car at 3:12 it is on. Does this mean your A/C is also running along with the heat in your car? This could make your car use a lot more energy.
J.K
J.K Måned siden
insideevs.com/news/458229/tesla-skipped-testing-lfp-model-3-china/?fbclid=IwAR1GtYM7OHO4yzKIsrOZjsuahqJAGICLE92i-jWPZtEZ-LlrqwtX-Pi7fpU
HDQEK
HDQEK Måned siden
What about a commuting test: Car outside during the night. Start in the morning without preheating. Driving 20 km to work with heating up the cabin. There the advatage of the heatpump should be much bigger, than at "just" keeping the temperature inside the car. AVG speed of the car perhaps only 35 km/h and many KW for heating.
Crazypostman
Crazypostman Måned siden
I ran an extreme heater test on my Tesla the other day, I went from 90% battery to 20% battery in 6 hours. My test was a little bit different though I left the heater on maximum.
Salipander ErisGeenAnder
Salipander ErisGeenAnder Måned siden
The heat pump has a cold and hot side. The incoming air can be dehydrated by passing it through that cold side first, I guess?
BlueTrepidation
BlueTrepidation Måned siden
Is there info on power consumed on auto vs manual no ac vs lower fan setting vs air recirculation turned on? I'm assuming recirculating the air vs heating the damp cold air from outside should make a difference?
Dan Grassetti
Dan Grassetti Måned siden
sounds like not a huge real world difference...so how is it that the EPA estimates of the new cars are so much higher?
Máté Ny.
Máté Ny. Måned siden
Actually Scan my Tesla is spot on (2,2 kwh), check @ 5:58
Bjørn Nyland
Bjørn Nyland Måned siden
*2.2 kW
Rob Hoitsma
Rob Hoitsma Måned siden
Very interesting to compare the 'old' and new car! Indeed, it is not the end of the world to have the old one! The way to talk about it the way you do, I'm still very happy with my 'old' 2019 SR+! Great!
Andreas Tattarisuo
Andreas Tattarisuo Måned siden
I think this result is in line with physics. Heat pumps are between 3-5 times more efficient than using resistor heater.
asianguywithacamera
asianguywithacamera Måned siden
I'm surprised the new Model 3 doesn't deactivate the airflow on the passenger side when no passenger is detected. The Model Y received this update late summer. This will reduce the power draw from 700 to 500 watts (tested on my Model Y, SMT app)
C Ryan
C Ryan Måned siden
Arn’t the windows double pained. If so your calculations are using bad data as it’s not Apples to Apples.
Bjørn Nyland
Bjørn Nyland Måned siden
Almost irrelevant. It's just two front side windows.
Peter Zerfass
Peter Zerfass Måned siden
For people who have the old car: It was good enough when you bought it (or else you wouldn't have bought it)...so, of course, it's still good enough now. Just because something better exists doesn't make the old stuff automatically bad.
Alan H.
Alan H. Måned siden
Wait I thought the new model 3 has an 82 kWh battery?
Alan H.
Alan H. Måned siden
@Bjørn Nyland How did you find out? This one has a bill of sale? I'm getting one in the US end of year, and I am hoping I will get the larger battery pack.
Bjørn Nyland
Bjørn Nyland Måned siden
Not this one.
MaikaiGuy
MaikaiGuy Måned siden
This test was flawed because you selected an optimal temperature for a heat pump. Now try it at -10 and -20 degrees celsius. The heat pump will struggle and not be nearly as efficient.
MaikaiGuy
MaikaiGuy Måned siden
@Bjørn Nyland Oh, that changes everything because "Tesla claims..." 😎 Where are the specs? Heat pumps lose efficiency as temps fall. Installing a heat pump was a money saving effort for Tesla. The efficiency claims are minor and mostly for marketing. At lower temps the heat pump will lose much of it's advantage over a heating element. At warmer temps the heat pump would become most efficient but still, it would be more efficient to use the heated seats and steering wheel.
Bjørn Nyland
Bjørn Nyland Måned siden
Nope. Tesla claims that their heat pump is efficient also in those temperatures. And my test is of course not flawed. If you have ever been Europe, you would have known that 1-3°C is common temperature in winter.
Empty Hollow
Empty Hollow Måned siden
hey Bjorn! i rarely write any comments anywhere but if you can go check this out somehow that would be awesome nopost.info/throw/q9WvZ4yo1KqoeLs/video
Markus
Markus Måned siden
We will see how long I will stay here. You are at home man!
Corentin Harbelot
Corentin Harbelot Måned siden
Oooooo yeah !! Great review !
Alexander Kenway
Alexander Kenway Måned siden
It'd be awesome if you got your hands on the China Model 3s. Great video as always!
Kasmopaya
Kasmopaya Måned siden
Is the Model 3 with heat pump still as nice to sleep in, or is the noise too loud overnight? I really would like to have a test for that please.
Friedemann Gädeke
Friedemann Gädeke Måned siden
Very interesting content. Can you please check how much the AC consumed on your car?
Marc E
Marc E Måned siden
A bit of a sideways reasoning: how much can such a heatpump save in heating a house? Is it economically viable?
Marc E
Marc E Måned siden
@Bjørn Nyland Well, that's a bit of a surprise. Would you believe that in The Netherlands (Holland) it is kind of a novelty? Could you do a video about it, explaining the savings and cost of ownership? Maybe old news for Norwegians, but new for the rest of the world!?
Bjørn Nyland
Bjørn Nyland Måned siden
Of course. Lots of Norwegians including me has heat pump in the house.
David VanHouse
David VanHouse Måned siden
The battery size is slightly larger in the new model 3s
Bjørn Nyland
Bjørn Nyland Måned siden
Not this one.
Robert Francis
Robert Francis Måned siden
I thought the new Model 3 was 82 KWH.
Bjørn Nyland
Bjørn Nyland Måned siden
Not this one.
Youssef Awad
Youssef Awad Måned siden
Could you test if the battery still makes banging sounds while chargning?
Twin TESLA
Twin TESLA Måned siden
Do you know if preheating the battery uses the heat pump ?
Twin TESLA
Twin TESLA Måned siden
@Bjørn Nyland it's another cool thing since we often need to preheat battery on winter to increase efficiency !!
Bjørn Nyland
Bjørn Nyland Måned siden
Yes
MrAdopado
MrAdopado Måned siden
It would be interesting to compare how long each car heats up from stone cold to 21c. Some say the heat pump will be slower.
Mike Bryant
Mike Bryant Måned siden
I'd love to see a comparison of how long the two types of heaters take to do this. I love how fast my 2018 Model 3 warms up when it's below freezing.
Erwin Hooimeijer
Erwin Hooimeijer Måned siden
Wow big difference with that heat pump. In my Leaf I can switch on both heat pump and AC . That should be 2 systems then instead of a reversed AC acting as heatpump?🤔
Nate Hill
Nate Hill Måned siden
Thats got to be some sort of button/marking anomaly; they couldnt possibly have both. 2 evaporators and 2 condensors (1 of each inside and outside) and separate hoses/dryer? Where does the air come out cold and where does it come out hot when you do both at the same time?
christer karlsson
christer karlsson Måned siden
👍
Lars Terje Overrein
Lars Terje Overrein Måned siden
My old model 3 performance uses about 10- 15 wh/km less whit the ac off, so not that big diffrence then.
Anders Kverneng
Anders Kverneng Måned siden
Isn't 3x = 200%?
Bjørn Nyland
Bjørn Nyland Måned siden
3x = 300 % = +200 %
Tesla Power
Tesla Power Måned siden
What we all want to know is : is this update a killer for the second hand value of the 2019 & 2020 model ? I start to understand why Tesla was not so transparent about when and what the update will be so that people keep on buying the old model the last couple of month...
Tesla Power
Tesla Power Måned siden
@Bjørn Nyland simple and clear answer , tack !
Bjørn Nyland
Bjørn Nyland Måned siden
No
Daniel Vanced
Daniel Vanced Måned siden
Doubt it, most people don't care too much about the technical details, and 5% range increase isn't massive. People watching these videos are enthusiasts.
J P
J P Måned siden
I've heard that heat pumps lose efficiency in extreme temperatures so it would be worthwhile to repeat the tests when the temperatures are below -15C
Bjørn Nyland
Bjørn Nyland Måned siden
Correct. But Tesla claims their heat pumps are efficient even in extreme cold.
Zurelia
Zurelia Måned siden
woudn't it be great if you could get a model 3 lr 2020 edition that is like 2-3 months old to compare with the 2021 one? So we dont have to think about battery degradation.
Zurelia
Zurelia Måned siden
great test btw, loved it. alwaus been wondering how much heatpump actully helps...
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