In-Roof Mounting
Alternergy supplies fully certified roof-integrated solar panel systems for UK trade customers, designed for a clean finish and reliable performance.
We stock trusted in-roof systems from S4 In-Roof Mounting System and Viridian Solar. The S4 System, our newest addition, is built around a patented universal base plate and an ultra-simplified architecture - enabling faster installation, guaranteed compatibility across all panel formats, and long-term performance. Both are UK-based manufacturers.
Viridian Systems
Viridian Solar is the UK’s leading manufacturer of roof-integrated solar panel systems, known for its flagship Clearline Fusion range. Designed for new builds, retrofits, and architect-led projects, Clearline Fusion offers a sleek finish, fast installation, and certified performance.
Installed on over 100,000 UK homes, Viridian systems are trusted by installers, developers, and roofing contractors. All systems are fully compliant with MCS 012, Part L, and key British Standards.
- Flush-fit design with no separate tiles or flashings
- Compatible with slate, clay, and concrete roofs
- Fast push-fit installation – under 45 minutes per kWp
- High wind resistance and top UK fire rating (BROOF T1–T4)
- Newer advanced glass-glass TOPCon modules with 30-year power warranty
- Fully MCS 012 certified and tested to BS 8612 / BS 6399-2
- Part L & SAP-ready – ideal for new-build compliance
Viridian Solar systems are particularly suited to:
- New-build housing developments
- Full roof refurbishments and re-roofing projects
- Architect-led designs requiring discreet solar
- Conservation areas and planning-sensitive zones
- Projects needing SAP performance and Part L compliance
We supply complete Viridian Solar kits tailored to your roof type, tile material, and system design. Each kit includes:
- Viridian monocrystalline PV panels (only compatible with their system)
- In-roof mounting trays, brackets & fixings
- Portrait and landscape layout options
- Optional inverters and system accessories
- Full technical documentation is available, including installation manuals, datasheets, MCS certificates, and Viridian Fusion Configurator.
We stock a curated range of MCS-certified solar panels trusted for performance across all system types:
- Seamless Integration: Installed flush with the roofline for a sleek, low-profile finish
- MCS 012 Certified: Fully compliant with UK building regulations and weather resistance standards
- Optimised for New Builds: Supports SAP ratings and planning requirements
- Built for the UK Climate: Durable, weather-sealed systems for long-term performance
- Flexible Compatibility: Works with concrete, slate, and clay tiled roofs
These features reflect the standards of most high-quality roof-integrated solar systems available in the UK.
New-build housing and re-roofing projects: : In-roof systems are ideal where the entire roof is being constructed or replaced. Installed ahead of the surrounding roof covering, they streamline installation and reduce material costs by displacing traditional roofing materials.
- Conservation areas and planning-sensitive sites: Preferred in areas where low visual impact is required, with designs that blend seamlessly with slate, tile, or clay roofs.
- Architect-designed homes: A discreet, integrated solar solution that complements modern, high-spec housing.
- Commercial and mixed-use buildings: Clean aesthetics without compromising solar performance.
- Projects aligned with the UK’s Solar Roadmap 2025: Supporting the growing demand for roof-integrated solar panels in residential installations.
Why Choose Us?
We’re a trusted B2B solar distributor, stocking roof-integrated systems and accessories with fast delivery across the UK, backed by expert support and dependable trade service.
Get in touch with our team or log into your trade account for real-time pricing, stock availability, or to request a quote for full project kits.
Browse our In-Roof Systems
