Sorry to Hijack the thread, but I am a new owner of a 30kw Leaf with a similar query to the Op.
I have tried to search for information on my query, but this thread was the closest match
I picked up my new Leaf yesterday which had a total of 142 miles on the Display after being charged at the dealer on a rapid charger.
After driving it around very economically ( we have driven other EV's Previously) , we set it to charge over night from a Type 1 Tethered home connection.
The battery had charged to 100% but was only showing 112 miles.
We dropped my son off at work and returned home, a journey of 25 miles. The display now showed 85 miles. which was pretty accurate.
I have set the car to charge and its saying it will take 3 hours. From my calculations it will put around 10miles on every hour meaning that the display will only show around 117 (if I am lucky).
from what I have briefly read the Display (GOM?) is not to be trusted and can show different mileage dependant on how you drive the car.
We also own a Tesla and a full charge always shows the same amount of mileage available, give or take a couple of miles, although this will only change once we start to drive.
Is the GOM really that sensitive that the fully charged display can differ by 30-40 miles when only a day old.
Yes, I am a newbie, please go easy