Photovoltaic panel ventilation clearance specifications

How wide should a photovoltaic pathway be?

For each roof plane with a photovoltaic array, a pathway not less than 36 inches wide (914 mm) shall be provided from the lowest roof edge to ridge on the same roof plane as the photovoltaic array, on an adjacent roof plane, or straddling the same and adjacent roof planes.

What are the different types of PV installation?

There are two main types of PV installation: integrated into the roof surface, often referred to as Building-Integrated Photovoltaic (BIPV) systems or mounted above the existing roof covering, also referred to as stand-off systems.

What factors affect the performance of a PV panel system?

There are important factors to consider during the design and installation of the PV panel system, which affect both the system performance and the control of risks. A fire on the roof is difficult to control using manual firefighting. The PV panels will often have extensive plastic content and some roofs are combustible.

What is a roof mounted photovoltaic system guidance?

The guidance refers only to the mechanical installation of roof mounted integrated and stand-off photovoltaic systems; it provides best practice guidance on installation requirements and does not constitute fixing instructions.

Are there any UK standards relating to a PV installation?

While many UK standards apply in general terms, at the time of writing there is still relatively little which specifically relates to a PV installation. However, there are two documents which specifically relate to the installation of these systems that are of particular relevance:

Where should a photovoltaic panel be installed?

Class A, B or C photovoltaic panel systems shall be installed in jurisdictions designated by law as requiring their use or where the edge of the roof is less than 3 feet (914 mm) from a lot line. RS404.1 (R905.1) Roof covering application.