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.
In-Roof Solar Mounting Systems
Alternergy supplies roof-integrated solar panel systems and in-roof PV mounting kits for UK installers and trade customers working on new-build, retrofit and roof replacement projects.
Our range includes S4 In-Roof Mounting System and Viridian Solar, supporting clean, low-profile solar installations with reliable roof integration.
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.
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
