This is a perfect nerd snipe. I can't imagine any car owning (esp ev owning) engineer hasn't or wouldn't eventually think about "why can't I charge my car from my car".
You might like the series by youtuber 'Power of Light' where he packs solar panels in his car to charge his car to do a solar cannonball run from New York to California on those solar panels alone: https://m.youtube.com/playlist?list=PL9nfj0jfPXYBF8FO7sckzvV...
Can't remember how long it took, think a couple weeks at least?
he planned for 30 days and it wound up taking 60. he didn't strategize to minmax it, though? there was a lot of up and down and he stopped mostly at places where there were fun public camping parks. also he went solar -> battery -> ac -> tesla with an alternator to a standard tesla house plug iirc? whoo.
i think there was an interview later where he said, "yeah never doing that again" or something to that effect.
