COMPACTFLAT S uses compact aluminum brackets instead of a continuous rail structure. The system requires only a few components and can be stored and transported in a space-saving manner. Its aerodynamic design has been tested in a wind tunnel and can reduce the amount of ballast required. The small contact area of the brackets also helps water drain off the roof. The system is CE-marked and comes with a 25-year product warranty.

The PES protection pad comes pre-assembled to eliminate steps and reduce installation time. It protects the roof membrane exactly where the brackets and ballast elements rest.

Alpine brackets are used in cases of increased snow loads and to secure excessively long modules along their length. Roof anchors are used for hybrid load-bearing when the roof’s structural load-bearing capacity is insufficient for ballast alone.

AEROTOOL calculates, on a project-by-project basis, how much ballast is required for each bracket. The software also determines the snow load threshold at which additional Alpine brackets are required. As a result, ballast and additional system components are not selected on a flat-rate basis, but are determined based on the specific roof geometry and the loads specified for the project.

No. Depending on the project, COMPACTFLAT S can be secured using stone or gravel ballast, or with an anchor fastening. In a hybrid solution, roof mounting points and ballast are combined to reduce the total weight of the system. Which option is suitable depends on the roof structure, wind load, coefficient of friction, and load-bearing capacity.

For traditional flat roofs with concrete, bitumen, membrane, or gravel surfaces. The product family includes south-facing variants with 5-, 10-, or 15-degree tilt angles, as well as east-west variants with a 10-degree tilt—allowing users to balance yield per module against space utilization. Depending on the model, the system is secured using stone ballast, gravel ballast, or anchors. COMPACTFLAT GS is the ideal system for green roofs, while the COMPACTMETAL series is designed for sandwich and trapezoidal sheet metal roofs.

Using the coefficient of friction measurement kit directly on the roof. A weight block and a tension spring scale determine how strongly the system’s contact with the existing surface resists slippage. The measured value is incorporated into the ballast calculation and provides a more concrete basis than a general estimate.

COMPACTFLAT S is a compact mounting system with few components and variants for 5, 10, and 15 degrees south, as well as 10 degrees east-west. COMPACTFLAT SN 2 offers more clamping and rail options and is designed for modules up to 2,500 × 1,310 millimeters. COMPACTFLAT SN FAST focuses on pre-assembled east-west configurations with a 10-degree tilt and a module width of 1,134 millimeters. COMPACTFLAT S_BASE is designed for large modules, limited building load-bearing capacity, and various anchoring methods. The specific selection is calculated on a project-by-project basis.

For south-facing installations, variants with 5, 10, and 15 degrees are available; the COMPACTFLAT S10 PLUS is designed for east-west orientations with a 10-degree tilt. The S10 is available with row spacing of 380 or 527 millimeters, while the S15 is available with 571 or 790 millimeters. The S10 PLUS is available with row spacing of 182 or 350 millimeters. The specific variant is selected based on the planned roof layout.

Alpine brackets are used when the snow load—determined by AEROTOOL on a project-by-project basis—exceeds a certain threshold, and they also support extra-long modules. Wind deflectors reduce wind loads. Roof anchors combine attachment points with ballast and can reduce the total weight. Ballast trays accommodate additional ballast and distribute point loads more evenly; they are designed, among other things, for high wind loads and gravel roofs. The combination is designed on a project-specific basis.

Ballast trays are particularly useful when additional loads need to be added or when point loads need to be distributed more evenly across the roof structure. They are also helpful for gravel roofs or in areas with high wind loads, where more robust ballasting is required.

A dedicated cable management solution is available for string cabling of the module rows. In addition, brackets for microinverters and power optimizers, as well as universal cable clips, are available and can be attached to the module frame or the system. These components provide defined mounting points for electrical components and cables.

Our product brochures for the S10, S10 PLUS, and S15 are available for preliminary selection; the intake form is available for project preparation; and the bid template is available for the bidding process. For installation, there are common assembly instructions for the S05, S10, and S15, as well as separate assembly instructions for the S10 PLUS; the assembly instructions applicable to the specific model used take precedence. In addition, there are instructions for measuring the coefficient of friction. To submit an inquiry, please contact office@aerocompact.com or use the inquiry form.

The documented COMPACTFLAT-S projects cover a range of sizes: 75 kWp in Italy, 485 kWp at the Käsekeller in Lingenau, and 2.2 MW in Čačak, Serbia. This demonstrates that the same system can be used across this documented range.

AEROTOOL supports project planning by calculating the required ballast for each bracket and assessing the potential use of Alpine brackets. In addition, we provide advice on system selection and assist with technical planning. You can reach us at office@aerocompact.com, +43 5524 22 566, or via the contact form.