Full solution - all with Silicon.
If that's possible - and they can improve the cycle count... or do it cheap enough to make up for a low cycle count... or all of it - improve it, make it cheaper AND under one roof?
Even if that were true, this is a release by a company... they aren't going to give away their technology for other people to use.
That's what licensing agreements are for.
I just think that if I was a solar company that could use my equipment to produce batteries as well? That would be high on the priority list to include in packages...
Companies sure do love bundling things together.
I would expect the battery to be in the basement/garage/etc and not on the roof with the panels.