What is a substructure for PV?

The substructure for photovoltaic systems forms the foundation for the safe and stable installation of solar modules. It ensures that the modules are optimally aligned to guarantee maximum energy efficiency. At the same time, it must withstand extreme weather conditions such as wind, snow, and rain without compromising the roof structure.

Materials for the substructure

Choosing the right material is crucial for the longevity and stability of the substructure. Commonly used materials include:

  • Aluminium: Lightweight, corrosion-resistant and easy to assemble – ideal for many applications.
  • Steel: Particularly robust and durable, but heavier than aluminum.
  • Stainless steel: Ideally suited for demanding conditions, e.g. in coastal regions.

Aluminum has become the preferred choice due to its light weight and corrosion resistance. It allows for easy installation and reduces the load on the roof structure.

Assembly of the substructure

Assembling the substructure requires careful planning and precision. Errors during installation can compromise stability and lead to long-term damage. Here are the key steps:

  1. Structural analysis: Before the substructure is installed, the load-bearing capacity of the roof should be checked.
  2. Planning: Optimal alignment and tilt of the solar modules ensures maximum energy efficiency.
  3. Installation: The substructure is securely connected to the roof structure using special brackets and screws.
  4. Testing: After assembly, the structure is tested for stability and durability.

Important tips for the substructure

A high-quality substructure minimizes maintenance and damage. Please note the following:

  • Avoid improvised solutions: A professional substructure is crucial for safety.
  • Opt for certified systems: Systems with test marks offer additional security.
  • Plan for the long term: Choose materials and systems that will withstand the demands for decades.

The solution for photovoltaic roofs: CLEVER-TILE ®

If you're looking for a simple, durable, and safe solution for mounting your photovoltaic system, CLEVER-TILE ® is the ideal choice. This innovative system combines aluminum for maximum stability with straightforward installation. With CLEVER-TILE ®, you avoid problems such as damaged roof tiles or time-consuming modifications to the substructure.

Referenced terms and sources

This existing glossary article was reviewed and approved on 14 October 2026. Time-sensitive information still refers to its original publication context unless the article states otherwise. It does not replace installation instructions or confirm compatibility with a particular roof tile model.

Machine-assisted translation. The German version remains available.

Data sheet and installation guideOriginal source