Greg,
I have read several stories about fireman getting zapped from a PV system while they are fighting a fire. I have also seen a new PV system where the converter is right on the roof. It sends down AC power and it has overcurrent protection. This way you can use regular NM wire in the walls which helps to protect the cable from sunlight and damage. Also it helps when you lose AC from the grid, the DC stops on the roof and doesn't continue down like the normal PV systems do.
