COMPACTFLAT SN FAST is our pre-assembled rail system for PV installations on flat roofs. It is based on the COMPACTFLAT SN 2 and is designed for east-west mounting with a 10-degree tilt angle. You need only three different rail elements per project; front feet, click-in base plates, and rail connector brackets are already installed, and many connections are snapped into place rather than screwed together. The modules are mounted in landscape orientation and are clamped to either the short or long side, depending on the variant. The system has been wind tunnel-tested and is CE-marked.

Whenever installation time and material handling are the main cost drivers, SN 2 is the more flexible system—south and east-west orientations, multiple rail variants, and modules up to 2,500 × 1,310 millimeters. SN FAST forgoes part of this range and is designed for speed: east-west orientation at a 10-degree angle, optimized for the most common module width of 1,134 millimeters, three rail elements instead of many individual parts, and snap-fit connections instead of screw fasteners. For standard east-west installations with common modules, SN FAST is the faster choice; for custom formats, south-facing orientations, or unusual loads, SN 2 remains the right choice.

For horizontally mounted PV modules with an east-west orientation and a 10-degree tilt angle. The geometry is optimized for the standard module width of 1,134 millimeters. Depending on the variant, the module is clamped on either the short or long side. Project loads, module dimensions, and permissible clamping ranges must be verified before making a selection.

There are three configurations: a short-side clamping system with a 144-millimeter ridge spacing, a short-side clamping system with a 230-millimeter ridge spacing, and a long-side clamping system with a 144-millimeter ridge spacing. The narrower row spacing maximizes space utilization. The wider spacing creates more room between the rows of modules, thereby improving accessibility for maintenance work.

This is determined by the load zone. In regions with low snow and wind loads, short-side clamping is the more economical solution; within this design, you can choose between a 144-millimeter ridge spacing for a dense layout and 230 millimeters for better accessibility. For higher loads, long-side clamping is used: it maximizes the module’s load-bearing capacity because the forces are transmitted along the long side of the frame. In both cases, the module manufacturer’s clamping approval remains decisive—we will work with you to align it with the load assumptions for your site.

Using fixed ballast blocks, anchors, or both. Ballast clamps, which secure paving stones directly to the rails, or ballast angle profiles—which also serve as ballast supports and can be adjusted continuously to the module length—are used for ballasting. For anchoring, there is the single-anchor fastening—which, depending on the anchor design, can also be retrofitted next to the standard rail—and the double-anchor fastening, available in three lengths plus a reinforced version. On roofs with limited load-bearing capacity, a load-distribution plate that snaps into place without tools distributes the forces. The type of securing required depends on the roof structure, load-bearing capacity, and site-specific loads.

Yes, almost entirely. Cable management, load-distribution plates, anchor fasteners, and the fall protection system from the SN-2 system are compatible with SN FAST. For each specific project, we verify whether the respective component is compatible with the selected SN FAST variant and the roof structure.

Both reduce the number of steps required, just in different ways. The front feet, click-in base plates, and rail connectors are already mounted on the roof, and the universal click-in clamp snaps into place instead of being screwed in—its integrated grounding pins establish the potential connection as soon as the clamp is secured, and it is height-adjustable between 30 and 46 millimeters. The EUR pallet proves its worth in storage and during transport: All system components come in standard sizes, with just a few part numbers instead of many individual parts. For wholesalers, this means fewer storage spaces per project; for the construction site, it means less sorting before the first task is even started.

Our leaflet is available for the preliminary selection, the intake form for project preparation, and the bid template for the request for proposals. For installation, there are two separate assembly instructions: one for clamping along the long side and one for clamping along the short side; the assembly instructions applicable to the selected variant take precedence. In addition, there are instructions for measuring the coefficient of friction. The leaflet and intake form are also available in English, and the leaflet is additionally available in Italian. To submit an inquiry, please use the inquiry form or contact office@aerocompact.com.