If regeneration is accounted the way you described, I actually think that "since last charge" number is accurate. In such case Ben's video proves that
@wk057 research didn't produce accurate data.
Wrong. Did you look at the video? I see "Trip A", not "Since Last Charge". Nice try though.
In an earlier post, wk057 said his data went as high as 75 kWh, so doctored video or not, it still falls within his data set.
Not really. His claim is that TOTAL battery capacity is 74 kWh. Assuming 2 kWh buffer would yield battery usable capacity of 72 kwh.
Aside from the caveat above that this was not actually a "Since Last Charge" reading, at least we're on the same page here.
Ben's video was showing 75 kWh. As discussed earlier, this is likely conservative figure because they took a break for lunch. So any drain during this stoppage is not reflected in the above 75 kWh. If his cabin overheat protection kicked on during the lunch, there likely was additional significant drain that was not accounted in 75 kWh
See above. I see "Trip A", not "Since Last Charge".
Next, any power consumed while the high voltage system is engaged is accounted for. This is only not true for around firmware v6.x and below, which would have no bearing on the Model 3. This data isn't accounted for properly in the energy GRAPH still, in all versions on all vehicles, but it is properly accounted for in the trip meters.
(Detailed technical explanation of the above: The BMS keeps a total lifetime counter of kWh charged and discharged. Since v7.0, the trip meters just snapshot the odometer and these two values when reset. To get the trip data, it just does the math and displays the difference. Since the battery updates the kWh values for both counters any time the HV system is engaged, the trip meters will always have updated information, in motion or not. This is why the power usage in the trip meters will still be updated even if you reboot the system while driving.)
HOWEVER... the accuracy of this is greatly exaggerated at lower power usage. The measurements Tesla makes of charge/discharge is very accurate above 10A or so. Below about 10A (which is 3-4kW) the accuracy can vary greatly, as poorly as +/- 100%, and worse when near zero. So basic vampire drain while sitting, or mild cabin conditioning while idle/off, can be read as way less or way more usage than it really is (S, X, and 3). This gets even more exaggerated when you have slight inclines/declines on a trip where the power consumption/regen ends up near zero often. The sum of these errors can come out to huge variances in the trip meters over a long period.
But really, none of this matters, because the video that was posted was clearly not a 100% to 0% drive with even remotely controlled conditions. "Since last charge" was not shown. Don't get me wrong, I believe the guy probably had good intentions when he made the video. He probably didn't figure anyone would care if he charged for 5 minutes at some point if needed (pretty obvious this happened), which is why he couldn't show "Since last charge" and instead just showed "Trip A", which can be across any number of charges.
The route was also pretty much the perfect route that would keep the vehicle in the area of poor power consumption measuring for a large period of the trip (can see this clearly in the time lapse portions).
None of that really matters anyway, since it's not a "Since Last Charge" screen showing the info. So doesn't matter if he faked it or not, this is not admissible as any kind of proof since, based on the "Trip A" alone, there is no way to say that this was a 100% to 0% trip without charging. (We'll even ignore that analysis of the video pretty much confirms this was not a 100% to 0% trip, for the sake of argument.)
So seriously. One photo. One Model 3 that shows "Since Last Charge" any number of miles driven, 74 kWh or more used. Heck, even 72 would be impressive (despite that this wouldn't help your claims). Just one guys. So far all I've got is a "Trip A" from a Tesla enthusiast video. I mean, I'll post my Trip A. It shows like 6,000 kWh. Yeah, one charge! lol. Come on guys, get real.
No EPA/CARB/whatever testing matters at all (again, ignoring the facts of why this is the case, for the sake of argument) if not a single real world vehicle can achieve the numbers claimed based on its own calculations.
One legit photo of a Model 3 showing the "Since Last Charge" screen that backs up these claims. Until then, everything said by the people arguing against me on this should be taken with a plate full of salt.