For the consumer, sure. It's sometimes a blow-up-company, go-bankrupt move for the company setting up the structured finance.
No, they aren't. Read the annual report again. The most obvious risk: they've got 3-month "solar bonds" financing solar installs which have 20-year payment streams. That requires frequent and repeated refinancing. I'm not clear on how large this exposure is. There are several other financing schemes which expose them to more esoteric risks.
Go do some basic 101-level research into banking crises before you comment on this again.
If every install (with a 20-year payment stream) were financed with a 20-year non-callable bond, and the interest rate spread between the 20-year bond and the homeowner's payment was positive, there would be nothing to worry about. (It would be even better yet if the installs were financed by equity.) That is not what is happening at SolarCity.