I'm skeptical about the stated range on this car of 320 miles. Based on the computer, I average about 320 wh/mile. Doing the math (car has a 75 kwh battery - or 75,000 wh of capacity), 75000/320 gives you 234 miles of range. This is essentially what I'm finding. I use "%" not "miles," and I find that for each unit of "%" of degradation, I travel about 2.3-2.5 miles. Very occasionally higher than that. I don't accelerate hard and try to "regen" as often as possible.
What's your experience with this?
For 2020 AWD:
At 320 Wh/mi as displayed on the trip meter, assuming your battery starts showing 322 rated miles, you drive continuously without spending time in park, and you stop driving when you hit 0 miles (you do not attempt to drive further) you will get a
minimum of:
77.6kWh*0.955*0.98/320Wh/mi = 227 miles.
0.955 - accounts for 4.5% buffer
0.98 - accounts for trip meter uncounted energy
To achieve the 322 miles of range, assuming the same, you need the trip meter to read:
77.6kWh*0.955*0.98/322mi = 226Wh/mi.
The 2020 AWD EPA test started with a battery with ~79.8kWh, drove until the car stopped moving (~4.5%
below 0%), and achieved an average (on the trip meter) of:
~79.8kWh*0.98/322mi = ~243Wh/mi (actual efficiency about 248Wh/mi)
It is important to not use this value as the target, though, because it assumes using the entire buffer, and a brand new battery (well...a few thousand miles...I don't keep track of the exact miles on the specific test vehicle).
2020, 2019, 2018 Model 3 Battery Capacities & Charging Constants
Your car, if brand new, likely has in excess of 78 or 79kWh available for use right now. But once it drops to below 77.6kWh you will start to see you can no longer charge the vehicle to 322 rated miles.
Another thing to note is that in the Cold FTP test (20F) they were able to pull a bit less energy from the battery (1kWh less -which is actually a bit better than some results I have seen):
See 5-cycle data for 2020 Model 3 P with 20”.
Your main issue right now is cabin heat. Note in the 5-cycle test results above the 20F temps added about 100Wh/mi to the result (at the average of ~48mph for that test, that’s about 4.8kW).
Ironically, the way the formulas are set up and weighted, incorporating this result into the range calculations according to the EPA formulas (which they do!) results in a HIGHER range rating than if they had just used 2-cycle only testing. It’s because the weighting of that result is so low and the results on the other tests allow them to arrive at a scalar greater than 0.7 (the default 5-to-2-cycle conversion factor).
