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17 items found.S4 In-Roof Solar Mounting System
S4 In-Roof Solar Mounting System
S4 is a new generation of in-roof photovoltaic mounting system designed for complete or partial roof integration.
Built around a patented universal base plate and an ultra-simplified architecture, S4 is designed to support faster installation, flexible compatibility across a wide range of panel sizes and orientations, and long-term roof-integrated performance.
From compact EPDM seals to modular extensions, every detail is engineered for durability, reliability, and on-site installation freedom.
- Universal fit across different panel sizes and orientations
- Future-proof base: swap panels while keeping the base plate in place
- 5-component system for reduced complexity
- Faster installation with no or reduced batten requirements
- Integrated waterproofing with no top flashings
- Built to last with EPDM sealing and 25+ year durability
- 10-year product warranty
S4 Mounting Systems Demonstration
Watch how S4 simplifies in-roof solar installation with flexible mounting and built-in waterproofing.
S4 Mounting Systems Demonstration
Watch how S4 simplifies in-roof solar installation with flexible mounting and built-in waterproofing.
S4 is an in-roof solar mounting system designed for complete or partial roof integration. Its universal base plate supports different panel sizes and orientations, helping installers achieve faster installation, fewer components and reliable waterproofing with a clean roof-integrated finish.
S4 Design & Technical Resources
Access the official S4 Partner Portal for design tools, training, project support, technical documentation and the latest list of BROOF(t4)-approved solar panels. Technical documentation is also available on individual S4 product pages at Alternergy.
S4 Partner Portal & Configurator
Access S4 installer resources in one place, including the Configurator and Spacing Tool for designing in-roof PV systems.
S4 Partner Portal & Configurator
Access the official S4 Partner Portal for the Configurator, Spacing Tool, training, project support, technical documentation and the latest list of BROOF(t4)-approved solar panels. Technical documents are also available on individual S4 product pages at Alternergy.
Access S4 Portal
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Why Choose the S4 In-Roof Solar Mounting System?
S4 is an in-roof solar mounting system designed for complete or partial roof-integrated PV installations. Built around a patented universal base plate, it adapts to different solar panel sizes and orientations, giving installers more flexibility across residential, new-build, re-roofing and retrofit projects.
The system uses modular vertical and horizontal extensions to reduce format limitations and support portrait, landscape and mixed-orientation layouts. As panel dimensions evolve, modules can be replaced while the S4 base plate remains in position, helping preserve the roof structure and reduce future redesign work.
Faster Installation with Fewer Components
S4 is designed to simplify in-roof solar installation, helping installers reduce stock complexity, installation errors and time spent on the roof.
- Five core components for a simpler system
- Limited accessories to reduce stock complexity
- Fewer installation errors on site
- Faster, more consistent installation
- No battens required in portrait mode
- Reduced batten requirements in landscape mode
- Only one horizontal batten needed between rows in landscape installations
Integrated Waterproofing and Long-Term Protection
Waterproofing is built directly into the S4 in-roof PV mounting system, removing the need for top flashings while helping create a clean, roof-integrated finish.
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
- Zero maintenance
- Service life exceeding 20 years
S4 In-Roof Mounting from Alternergy
Alternergy supplies S4 in-roof mounting products to UK solar installers and trade customers. Installers can source S4 components alongside solar panels, inverters, batteries and PV accessories, with support on product availability, compatible components, project suitability and trade pricing.