Solar City could presumably sue the local installer if they're to blame, but it makes no difference to the customer who bought a product from Solar City.
That animal must have been sitting on its eggs, and carelessly smoking a cigar I guess!
No... The cause will have been overheating of the 'optimizer' (MPPT tracker which outputs a fixed voltage) when it failed to a high impedance state, probably due to water incursion. The fire will have happened on a sunny day, because it's the energy from the other panels which starts the fire.
Tesla really should have made more parts of the system non-flammable. Then the story would simply be that this guy's system stopped working (or even 1 panel out of 16 stopped working, so output was slightly reduced)