What exactly are you interested in?Heat pump efficiency or normal efficiency? You can check my other thread with the 2019 vs 21 tests and you will find some useful informations that will help you make a decision.
Actually not an issue anymore, my friend just took delivery of a new 2021 SR+ so we can compare side by side. What I have found is I get about 200-250 wh/km usage in the city about 10 degrees above freezing. He gets about 150-170 with the same heater settings and a similar driving style. So the difference just above freezing is really noticeable, especially on longer trips where the octovalve lets you harvest waste heat from the battery to heat the cabin with.
Yeah we are planning to do a side by side comparison trip along Highway 1 spanning 100km or so. I think the perfect number seems to be about 7 degrees celsius. Much lower the heat pump seems to achieve less efficiency (although still markedly better than the PTC heater). You nailed it that 8 months of the year the new design is a winner in the Olympia area and south west BC. In colder parts of Canada, there is probably little benefit from the new design, and in Tesla's home state of Cali it is probably fairly useless.
No, on longer trips the difference will be smaller, because of the speed. I have done some tests and the difference is 10% more range.
You're still not caring to demonstrate this, that implies that, excluding the heat pump, there's no increase in efficiency in the 2021.
Patience, my friend
Of course you see the biggest percentage difference in the city. Technically standing parked with the climate on would be the biggest percent difference, since the motor would then be consuming nothing. However, in terms of raw kWh wasted, my 2019 will be wastefully pumping out heat to the atmosphere like a gas car (although obviously on a smaller scale). Last highway drive I did I actually overheated the battery a bit and lost a bit of power temporarily. To be fair it was an open 3 lane road and I was on it pretty hard. There was for sure enough heat in that pack to heat the cabin, but my PTC heater was pulling ~1.5 kW for most of the time.
Did you measure it with scan my tesla? What was the outside temperature and the heating setup, AC on?
3% seems small and is hard to measure, but it's still impressive that they've done this in ~3 years. Squeezing ~1% / year efficiency out of a car is excellent work at highway speeds barring major aerodynamic changes. That's about 10 miles of range on a full charge to empty with a bit of room to spare which can be the difference between making it to your destination, or not.
There is no efficiency gain in the motors or elsewhere. Not between 2019 not 2020 and 2021. There is a video I am preparing coming along showcasing that.
Yep, basically the 2021 Model 3 AWD is just as efficient as the 2018 Model 3 RWD.
Interesting video, but I think you misunderstand how automatic vs manual climate control works. Setting it to manual is not some "hack" to save energy, it is simple physics. Set to 20.5 it will output air that is ~20.5 degrees (so if it's cold outside, your cabin will be LESS than 20.5 due to the laws of thermodynamics). However, if you set it to auto and your car is below that temp, then it will output air that is WARMER than 20.5, which of course requires more energy. The AC also uses some energy, but there are benefits to conditioning the air before removing it, mainly dehumidifying. So comparing auto 20.5 to manual 20.5 settings is comparing apples and oranges. The manual setting could also use MORE energy if the cabin is above 20.5, as it will keep generating heat.
I don't quite understand what you mean by apples to oranges. If you mean that the cabin temperature will not always be 20.5 on manual, sure it will not be, but it is plenty warm even at 2°C to heat up the cabin.
Let me put it as simply as possible. You set it to 20 degrees in auto mode, the temperate is 5 degrees outside the car, the car must emit much more thermal energy from the vents to achieve 20 degrees in the cabin. It will certainly use a temp higher than 20C at some points. If you simply set it to manually output 20 degree air, it is physically impossible for the air in the cabin to achieve a 20 degree temperature on average due to thermal loses from the massive amount of glass that dissipate heat quickly. The temperature inside your car with the climate control on manual 20C will not be 20 degrees, it will be less. Therefore, you of course will use less energy from the battery. I'm not saying that it isn't comfortable, just that it's not comparable. The laws of physics are rather simple on this matter.
