Are double-glass modules flammable?

Under exposure of a strong burning fire, double-glass modules present a high degree of resistance to ignition, do not propagate fire to the roof deck or other building material, do not slip from their mounting position, and are not expected to produce any flying burning debris. (Fig. 10, 11)

Can a PV module be mounted over a fire rated roof?

The old version of UL1703 provided a fire performance classification for the PV module, and the UL Whitebook provided a description that the module had to be mounted over a fire rated roof of the same or higher fire class. (Class C module over Class C, B, or A roof).

Are photovoltaic panels fire rated?

Effective January 1, 2015, Rooftop mounted photovoltaic panels and modules shall be tested, listed and identified with a fire classification in accordance with UL 1703. The fire classification shall comply with Table 1505.1 of the California Building Code based on the type of construction of the building.

Does a PV system compromise the minimum fire safety requirements?

The objective of the code is that the installation of a PV system doesn’t compromise the minimum fire safety requirements for the roof. The language of this section states that the fire classification of PV systems must match the minimum fire classification of the roof assembly over which it is mounted.

Should a PV system have a fire rating?

In the absence of a fire rating for PV systems, it may seem appropriate to use the fire rating of the PV modules in order to ensure the desired result of retaining the roof assembly’s original fire classification. This is what some Authorities Having Jurisdiction (AHJ) have done.

What is the fire classification of a roof mounted photovoltaic system?

1509.7.2 Fire classification. Rooftop mounted photovoltaic systems shall have the same fire classification as the roof assembly required by Section 1505. Different language was approved in the IRC. M2302.2.1 Roof‐mounted panels and modules.