solar panel flashing

I am seeing more and more solar panels going up.  As yet, I have not been on a roof that has solar panels.

How are these panels flashed?  Are they just screwing the brackets directly to the roof like all of these dish mounts?  I can't imagine that they are properly installing a mount.  If they are, do they just screw them directly to weak OSB decking?

There is a range of options available now that avoid lagging directly to deck.

The best systems use stand-off mounts conforming to a careful layout.

The mounts are secured to framing members and after the roofing is installed,

complete with a flashing for each mount, channels are locked onto the mounts and

the panels are locked onto the channels.

On a tear-off, we dry in and snap lines on the rafters for the solar guys.  Then we

oversee their stand-off placement to make sure they don't get everybody in trouble.

It all works out pretty well, actually.