That’s not fair, there’s so many variables. The Kia/Hyundai heat pump is the most efficient on the market. The range loss with/without heating is 10% next to Tesla model s 18% and model 3 at only 40%.
My head isn’t on for maths just now, so I will have to revisit your post later. Just back from doc’s
I don’t know who has the best heapump, as manufuturers blurb all make out theit imovations are best. Tesla’s heat pump or rather new desisgn is said to be arguably the best on the market. Which come to think about it, I was watching a mechanics review video of the i6 and also looked at the heat pump compating it to this simple but magical design Tesla’s have adopted. Either way we are luck getting perhaps one of the better heat pumps from Hyundai on the scheme.
I got the idea your sums didn’t account to £999 over 3yrs which we agree,
https://insideevs.com/news/632388/tesla-innovative-efficient-heat-pump-explained-new-video/