This is interesting:"In 2021 we are giving Challenger teams the opportunity to explore the advantages and disadvantages of four wheels versus three wheels."
Challenger class is something Aptera won't be competitive in at all, though, to the point that I suspect an Aptera would DNF - in practice there's 5 kWh allowed in the pack. (It's designed for single-seater purpose-built prototype vehicles that only get solar charging.)
But, I do wonder if Aptera actually announcing a production solar EV two days before the previous World Solar Challenge might have helped cause that change to the rulebooks, even if Aptera is closer in concept to the Cruiser class than the Challenger class...
This is interesting: "In 2021 we are giving Challenger teams the opportunity to explore the advantages and disadvantages of four wheels versus three wheels."
https://www.worldsolarchallenge.org/blogs/2020/11/03/why_do_cars_have_four_wheels?fbclid=IwAR0VfgsuMfMVZLQrVH5aeSfzCpbRVbHnAiUdJ1QEHgk9p-sEd_eGc7JD1D8