I’m pretty sure solar roof was introduced as a way to pump stock when Tesla was doing poor financially
And to misdirect the acquisition of Solar City, famous for being run by Elons cousins to basically pocket all the tax credits, but which was not going well.
Nah, Elon Musk faked the demo [1] so he could defraud Tesla investors into bailing out his cousins.
[1] https://mansionengineer.com/2018/08/10/elon-musk-tesla-and-t...