S-5! White Paper Challenges Solar Mounting Assumptions
New research suggests metal roof sheeting can support solar attachments between purlins instead of over them.
Updated on Oct. 22, 2026 in Energy
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Manufacturer S-5! has released a white paper demonstrating that solar panels can be securely mounted to metal roof sheeting between support purlins. This finding challenges the traditional assumption that solar attachments must be located directly over structural purlins to ensure stability.
Why it matters
By demonstrating that roof sheeting can support solar loads, this research could allow for greater flexibility in solar array design across Australia. It addresses concerns regarding load distribution and wind uplift resistance for systems installed on metal roofing.
The paper relies on static and cyclic load testing to analyse wind uplift resistance. Key specifications include the PVKIT 3.0 rail-less mounting system, which is available in standard and 50 mm riser configurations.
The players
S-5!
This company specialises in engineered attachments for metal roof applications.
All Energy Australia
This is a major annual exhibition held in Melbourne focused on renewable energy technology.
The details
The system secures solar modules directly to roof seams or ribs using clamps or brackets rather than penetrating the roof surface. Through the use of a PVKIT interface, the setup distributes weight across the roof sheeting and supporting structural framework.
Timeline
22 October 2026: S-5! releases the white paper on solar mounting.
28-29 October 2026: S-5! exhibits at the All Energy Australia conference.
The Big Picture
This research represents a shift in structural engineering, as it seeks to move away from the rigid requirement of aligning solar arrays strictly with purlins as defined in the National Construction Code of Australia.
This development could allow solar installers to optimise array layouts on metal roofs that previously faced design limitations. By utilising the 16 fastening points on the Facet Mount system, installers may improve structural security on diverse roof profiles.
The takeaway
Builders and engineers should review these findings to determine if they can simplify their solar installation process without compromising safety. Implementing these mounting techniques may provide a more efficient path for future solar projects on metal roofing.
What happens next
S-5! is scheduled to present its findings and exhibit at the All Energy Australia conference in Melbourne from 28-29 October 2026.
Further reading
Learn more about the latest developments in Energy technologies.
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