At 100% charge today, it showed 327 miles. I honestly didn't know there was an energy screen method. I've taken a screenshot of the steps so I can do that tomorrow. I assume it might be different though since car is at 69% charge now?
The
energy screen method is tried and true. I try to link to it whenever I can because I think it tends to reduce confusion around here. And it works.
327/330*79kWh = 78.3kWh
69% will be fine. You'll get reasonably close to the above value, probably within about 1kWh. The only thing that suffers at lower SOC with the method is the precision (extrapolation error). It's still accurate, but less precise.
Given you started probably around 80.5kWh (no way to know but many cars do), you're down about 2.8%. (Down 1% from 79kWh, the degradation threshold.)
Rated range new was 330 miles, 100% range at the time of the test was 321 mile.
76.8kWh. So down about 4.5%. Down 2.8% from the threshold.
Usually charge to 85% or even 90% and then charge again when it drops to 40%. When we do longer trips on the weekends, I sometimes charge to 100%. That's because our weekend trips are around 150-200 miles. I've used Supercharging maybe 10 times so far. Only supercharged to 100% thrice while on long trips (or before long trips).
Since you are both running the battery health test, maybe you care about capacity loss & calendar aging. Obligatory reminder that keeping the car at 55% or below as much as possible (time-averaged) is best. It'll slow capacity loss from aging by about a factor of 2 (maybe a bit less).
So if your schedule & usage allows, just charge to 55% and charge every day.
No worries at all about Supercharging or going to 100%. It really doesn't matter at all as long as it doesn't stay there. Just make sure it's at 55% or below nearly all the time (even lower is better but you get most of the benefit by 55% so it's really not worth worrying about). Really just have to remember that "one simple trick" and not worry about anything else. For many owners it's quite easy to be below 55% more than 90% of the time - and it's not worth worrying about that final 10%.
Lots of data elsewhere on this forum that support these claims.
If you don't care about these things, just use the car as you see fit.