Ah, I just grabbed it from the energy usage on the car screen from last charge. Thanks for the replies though that answers my question.
And as covered in other
threads (but not in detail in the "Constants" thread yet because things are
still settling out on the Performance) - the 2021 SR+ has about 53.6kWh capacity when new. This means 204Wh/rmi. (53.6kWh/263rmi) And it's only 0.955*204Wh/rmi = 195Wh/drmi (displayed rated mile), because of the buffer.
So that means you have 0.955*53.6kWh =
51.2kWh between 263rmi and 0rmi, due to the 4.5% buffer.
So on the trip meter the most you'll ever see (if you don't drive below 0rmi) will typically be about 99% of that, or about
50.7kWh. For whatever reason it's hard to get it to count every last drop, even if you spend the entire time in drive.
So for your 80% scenario (assuming you have an undegraded battery) you should have seen
40.6kWh. You saw 27kWh.
As others have mentioned, the meters only count energy use when you're not in Park. So you used/lost about 13.6kWh while in Park. Not unusual at all - depends on Sentry use, time between charges, use of cabin pre-heating, etc., etc.
2/3 of your energy (in this scenario) was used to move the car, 1/3 of it was used for other features.