The heat pump @£1,000 as an optional extra for the ID3 will never pay for itself over 3 years (even 4 or 5 years and maybe even longer depending on mileage), even assuming the best possible saving of 20% (which it will not be all the time), I wont go into the figures as many others have done extremely in-depth analysis of this elsewhere. And of course as an optional extra you are also paying the VAT. There are other benefits of having the heat pump, for example if you suffer from range anxiety or really do need to get every single mile for a round trip without stopping; there are also environmental reasons as the heat pump is more efficient and therefore you are using less energy; it will also give you a more comfortable ride in certain situations. Possibly the greatest way to better efficiency for many EV’s and the ID3 in particular is the software. At the moment, you’re way better off financially keeping your £1,000 and just paying the extra few pence for a few months of the year to top up with the extra electricity.
We did the same maths with solar panels, which suggested between 18-25 years to fully recover the costs, after which time the panels would need replacing.