Pv Clearance From Edge Of Roof

Not sure if you found the answer but in the publication planning and installation photovoltaic system 2nd edition p276 7 2 1 it states in order to reduce the wind load the array should be a sufficient distance from the edge of the roof rule of thumb.

Pv clearance from edge of roof.

Where panels are to be located on one side only of a hip or valley that is of equal length the 18 inch. Of course those in cyclone areas have the strictest laws and are not allowed to be any closer than 1 metre from the edge or apex of a roof. The reason for this clearance is that it allows air flow under the solar panels for cooling them. 6 feet from the edge.

Five times the distance between the modules and the roof surface. Conventional fall protection guardrail fall restraint or fall arrest system is required. No solar pv systems should extend beyond the edges of the roof. Between 6 feet and 15 feet from the edge.

Panels with a minimum distance between the panel and roof edge of 2s where s is the gap between the underside of the panel and the roof surface. Depending on where you live different laws exist as to how close solar panels are allowed to be from a roof edge. So if you have a 50mm high gap between panel and roof 100mm minimum distance panel from the roof edge. For general industry working at a 4 foot height or a low sloped roof osha requires.

Panels and modules installed on dwellings with roof hips or valleys shall not be located less than 18 inches 457 mm from a hip or valley where panels or modules are to be placed on both sides of a hip or valley. Conventional fall protection guardrail fall restraint or fall arrest system is required. How far should the solar panels be from the edges of the roof.