I bet all of it is FOC if he agrees to do a favourable program. For me it is ironic that Llewellyn went from 'scrap heap challenge' to being the doyen of the renewables / EV community.
He makes it quite clear on a number of the videos that everything he has installed he has paid for and that he does not take FOC stuff from the various places he visits. I know his Tesla is leased and his Leaf he has had for years.
Regarding Scrapheap Challenge, I suppose that is the ultimate in green recycling, so no conflict there.
Sorry your weather is so miserable today. We have a gorgeous, dry, warm, sunny, morning here despite the fact the sun doesn't rise until almost 8 am this time of the year.