S4 In-Roof Mounting Systems
S4 is a new generation of in-roof photovoltaic mounting systems designed for complete or partial roof integration.
Built around a patented universal base plate and an ultra-simplified architecture, S4 enables faster installation, guaranteed compatibility across all panel formats, and long-term performance. From compact EPDM seals to modular extensions, every detail is engineered for durability, reliability, and total freedom on site.
At a glance:
- Universal fit (all sizes & orientations)
- Future-proof base (swap panels, keep base plate)
- 5-component system (less complexity)
- Faster install (no/less battens)
- Integrated waterproofing (no flashings)
- Built to last (EPDM + 25+ years)
- 10-year product warranty
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Why S4
S4 adapts to all panel heights and widths, from legacy modules to future generations. Modular vertical and horizontal extensions eliminate format limitations and reduce redesign work.
Future-Proof by Design: As panel standards evolve, only the modules are replaced. The S4 base remains in place, preserving the roof structure.
Total Layout Freedom: Portrait, landscape, or mixed orientations can be combined on the same roof without additional parts or added cost, offering full flexibility during installation.
Ultra-Simplified Architecture: With only five core components and a limited number of accessories, S4 reduces stock references, logistics complexity, and installation errors.
Designed for Faster Installation
The patented S4 universal base plate is compatible with all panel sizes and orientations, replacing multiple mounting references with a single solution that simplifies planning, inventory management, and on-site execution. Engineered to reduce time on the roof and improve consistency across teams, S4’s fixing logic minimises preparation and streamlines installation on any layout, simple or complex.
Key outcomes
- Fewer components
- Fewer errors
- Faster installations
- Improved long-term performance
Installation advantages
- No battens required in portrait mode
- Reduced battens in landscape mode - only one horizontal batten between rows
Integrated Waterproofing & Finish
Waterproofing is built directly into the S4 system. The design eliminates the need for top flashings while ensuring long-term roof protection and a clean, architectural finish that integrates seamlessly into the building envelope.
Compact EPDM Seals
S4 uses compact EPDM rubber seals (70 Shore A) designed for direct mechanical clamping. Unlike foam seals, they maintain compression, resist deformation, and ensure durable watertightness in all conditions.
- Temperature range: –40 °C to +120 °C
- UV, ozone, weather, and chemical resistant
- Service life exceeding 20 years
Quality Control & Material Testing
Every component is manufactured from rigorously selected technical polymers and tested according to ISO and ASTM standards. Full batch traceability guarantees consistency, reliability, and long-term confidence.
Built for Professionals
S4 standardises in-roof installation with a universal base plate, minimal components, and full orientation flexibility, reducing on-site decisions and preventing compatibility errors.
- One base plate for every configuration
- Portrait installations without battens
- Landscape installations with only one horizontal batten between rows
- Simplified logistics
- Integrated waterproofing with no additional flashings
→ For more information about the S4 Mounting System, please contact us.
