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.

How much weight can a PV module impose?

This is compared to other methods of PV installation which could impose as low as 9 kg/m². It is important to consider the selection of PV modules as these can also not only vary in size but obviously in imposed loads as well.

What are the requirements for a PV installation?

Virtually all domestic PV installations will fall under the scope of Part P. Part P requires the relevant Building Control department to be notified and approve the work. There are two routes to comply with the requirements of Part P: Notify the relevant Building Control department before starting the work.

Should a solar PV array be installed on a new flat roof?

Any solar designer or specifier should give the same focus to ensuring the rooftop array is installed with methods that have as little impact as possible on the building and its waterproofing and that the array works to its maximum potential for its entire lifespan. There are numerous reasons for including a solar PV array on a new flat roof.

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.

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: