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Battery charging in car screen vs charger screen ?

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hello community.

I tried googling it and also searching from TMC but no luck. Can someone please explain to me which number is more accurate? The in car screen or the charger screen?

Just testing how many total kWh usable battery I have. I charge to 100% and drain it to 0% after a few days driving it. Then juice it back up to 100%. Car showing +74 kWh juiced and the charger showing +76.9 kWh. Which one should I go with?

I have a 2022 MYP with 25k miles. currently sitting on martian 19" rim with Michelin Power sports 4 Summer tires. I avg 256 wh/mi and got 235 miles, using 60 kwh. Sentry mode is on and Fan on, 45-60 F degree. Mix 50/50 city/HWY driving and 5-10 mph over limit. So I was able to do one trip without stopping, I should be about to get 290 miles range. 300 ish if I completely drain the pack. Not bad, consider this a performance model, but with 19" rims. And SF Bay Area commuting, plus I lived up in the hills (hate elevation for range. 🤬😆) If anyone is wondering. And if I really try, I can get under 250 wh/mi. And can go 315 miles range, pretty much what Tesla is advertising. :)

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