[elif]

I'm not sure where you got your numbers from, but as the owner and operator of multiple EV's and a powerwall, they sound way off to me.

But beyond that, there are big distinctions left out of your theory: for instance, that the F150 is selling for 130-145k unless you happen to be friends with a ford dealer, and that the powerwall's value is primarily derived from grid peak time cost savings, not just emergency backup.

Unless you plan to charge and discharge your car's battery daily, by, i suppose manually flicking your main breaker over (is that even legal?) you will not see that value returned with your truck.