About S4 Mounting System

S4 Mounting System is an industrial photovoltaic mounting systems manufacturer, focused on delivering robust, universal and future-proof in-roof solutions for residential and new-build markets.

Our approach combines engineering discipline, regulatory compliance and long-term industrial vision, supporting installers, distributors and housebuilders in deploying photovoltaic systems that are reliable, scalable and aligned with evolving market standards.

An Industrial Vision for In-Roof Photovoltaics

S4 was founded to address a structural challenge in the solar industry:
 
The growing complexity, fragmentation and dependency created by proprietary in-roof systems.
By developing a universal, certified and panel-agnostic integration platform, S4 enables the industry to move towards:
  • Simplified supply chains,
  • Reduced installation risk,
  • Long-term compatibility with future panel technologies.

Leadership & Market Experience

S4 Mounting System is led by G.Y. Sabban, a recognised figure in building-integrated photovoltaics with more than a decade of experience in the sector.
 
His background combines:
  • Deep knowledge of in-roof photovoltaic systems,
  • Hands-on experience with industrial manufacturing,
  • Direct understanding of installer, distributor and housebuilder requirements.
This experience has shaped S4’s philosophy:
 
Engineering-led solutions, designed for real-world deployment, not marketing-driven concepts.
This experience is based on long-term industry observation and market engagement.

A New Generation of In-Roof Systems

S4 Roofit represents the first milestone of this vision.
 
It is designed to deliver:
  • A universal in-roof mounting solution, compatible with all major photovoltaic panel manufacturers,
  • A single certified system supporting market evolution,
  • Consistent performance across projects and regions.
 
Key principles include:
  • Simplified logistics through reduced SKU count,
  • Efficient inventory management for distributors,
  • Fast, repeatable installation for installers,
  • Long-term compliance for housebuilders.

Certified, Compliant and Market-Aligned

S4 Mounting System operates within a framework of independent third-party validation, ensuring credibility and regulatory alignment.

Our systems are:

  • MCS 012 certified,
  • BBA assessed, confirming compliance with NHBC Standards.

This dual validation reflects S4’s commitment to meeting the highest levels of market expectation, particularly within the UK new-build sector.

Industrial Efficiency & Responsible Manufacturing

S4’s universal system architecture enables:

  • controlled tooling investment,
  • scalable local production strategies,
  • reduced transport distances,
  • optimised logistics flows.

Material choices and production processes are designed to:

  • support durability and longevity,
  • reduce waste at installation level,
  • align with circular economy principles.

Where applicable, recycled industrial materials are used, sourced from established and reliable supply chains.

A Platform for Future Development

S4 Roofit is not a standalone product, but the foundation of a broader industrial roadmap.

Additional solutions are under development across:

  • roofing integration,
  • photovoltaic mounting technologies,
  • system-level optimisation.

The objective is to build a coherent product platform, focused on simplicity, durability and long-term value.

An Experienced, Multidisciplinary Team

S4 Mounting System is supported by a multidisciplinary team combining expertise in:

  • photovoltaic systems,
  • industrial engineering,
  • structural design,
  • international market development,
  • digital tools and configurators.

Our engineering and technical teams work closely with laboratories, certification bodies and industry partners to ensure:

  • precision in design,
  • robustness in execution,
  • continuous improvement of our systems.

Engineering-Driven Innovation

Innovation at S4 is led by a dedicated engineering office, ensuring that all developments are:

  • technically sound,
  • compliant with market standards,
  • optimised for real-world installation.

This disciplined approach has already resulted in patented solutions, reinforcing S4’s position as a serious industrial partner rather than a commodity supplier.

This long-term, standards-driven approach enables S4 Mounting System to support large-scale residential developments with consistency, predictability and reduced technical risk.