[pjschlic]

Am I missing something here? I tried to use his number to run a net present value assessment of a few example cars and came up with wildly different numbers of NPV. I think a Tesla is cool, but if you are trying to save money by buying a 93k Tesla rather than a 50k BMW, you might not be saving all you think you are (assuming a 3% depreciation factor for future money, I didn't see what he was using, looking only at the year 8 when the car is sold back):

Tesla S85:

[year one] 93,970+8222+1170

[Tax break] -(10000/1.03)

[resale] -(30,160/(1.03^8))

[electricity and maintenance] +(600/1.03)+(1900/1.03)+(600/1.03^2)+(650/1.03^3)+(650/1.03^4)+(1300/1.03^5)+(1300/1.03^6)+(1350/1.03^7)+(1350/1.03^8)

= -78383 NPV

BMW 382d (ICE with greatest depreciation / maintenance):

[Year one] 50000+4480+1200

[Resale] -(15000/(1.03^8))

[Gas and maintenance] +(1594/1.03)+(1631/1.03^2)+(1669/1.03^3)+(1706/1.03^4)+(2288/1.03^5)+(4327/1.03^6)+(2365/1.03^7)+(2404/1.03^8)

= -59385 NPV

Did I make a mistake here?