The selection depends on the roof surface and the method used to secure the system in position. COMPACTFLAT S, COMPACTFLAT SN 2, COMPACTFLAT SN FAST, and COMPACTFLAT S_BASE are suitable for concrete, bitumen, membrane, and gravel roofs. COMPACTFLAT GS is designed for green roofs and systems with bifacial modules, while COMPACTMETAL systems are intended for sandwich panel and trapezoidal sheet metal roofs. Depending on the roof, the system can be secured with ballast, anchors, or a combination of both. The final selection also depends on the roof’s load-bearing capacity, module format, orientation, and site-specific loads.

Each system has a different focus. COMPACTFLAT S is a compact bracket system with few components and short installation times. COMPACTFLAT SN 2 is a rail-based system with short-side and long-side clamping, three rail configurations, and support for module sizes up to 2,500 × 1,310 millimeters. COMPACTFLAT SN FAST is designed for pre-assembled east-west configurations with a 10-degree tilt and a module width of 1,134 millimeters. COMPACTFLAT S_BASE distributes point loads via its base plate and offers both ballast and anchor fastening for projects with limited building load-bearing capacity or large modules. The appropriate system is selected on a project-specific basis.

Two systems are suitable, for different reasons. COMPACTFLAT SN 2 is specifically designed for module sizes up to 2,500 × 1,310 millimeters and accommodates different module widths via its adjustable foot — making it the preferred choice when the individual module is large. COMPACTFLAT S_BASE is designed for large, continuous module arrays and accommodates their thermal expansion through its system design — making it the preferred choice when the overall array, rather than the individual module, is large. The right solution therefore depends on which dimension presents the challenge in your project.

COMPACTFLAT SN FAST. Pre-assembled front supports, click-in base plates and rail connectors, click connections, and three rail elements per project reduce the number of installation steps required on the roof. The system is designed for east-west configurations with a 10-degree tilt and a module width of 1,134 millimeters. If the module format, orientation, or project requirements differ, COMPACTFLAT SN 2 offers greater flexibility.

COMPACTFLAT GS is our elevated mounting system for green flat roofs and bifacial PV modules. The increased distance from the roof surface provides space for light and maintenance work. With bifacial modules, reflected light can reach the rear side of the modules. The potential additional yield depends on the reflectivity of the roof surface and the specific system design.

Ballasting is an option when the roof’s load-bearing capacity can accommodate the additional weight. If the total system weight needs to be reduced, roof attachment points can provide part of the required positional stability. A combination of anchors and ballast is also possible. The required configuration and amount of ballast are calculated based on the roof structure, permissible additional and point loads, wind loads, and project-specific structural requirements.

For flat-roof PV systems, AEROTOOL provides particular support with ballast calculations. Site and building data, satellite imagery, shading, wind and snow loads, and structural requirements are incorporated into the system design. Depending on the mounting system, the required ballast is calculated for the individual brackets or rails. The resulting project documentation includes the system design, CAD plan, project report, module layout and installation plan, and bill of materials.

COMPACTMETAL TR is designed for sandwich panel roofs. COMPACTMETAL TS and COMPACTMETAL TL are available for trapezoidal sheet metal roofs. The appropriate system for the roof and planned PV module is determined based on the technical characteristics and application limits of each solution.

Yes. We support you in selecting the appropriate PV substructure, assist with technical planning, and provide documentation for project preparation. This allows the roof structure, module format, and method of securing the system to be coordinated at an early stage. For inquiries, contact us at office@aerocompact.com, +43 5524 22 566, or via our inquiry form.