K2 Systems — Mounting systems PV for professional installers

1. About K2 Systems

Founded in 2004 in Germany , K2 Systems has established itself as one of the world's leading manufacturers of mounting systems for photovoltaic installations. With 10 subsidiaries and distribution through more than 100 international partners , the company combines high-tolerance industrial manufacturing, digital dimensioning tools, and a range of components designed for complete interoperability.

Her point fort : a closed and coherent ecosystem — hook, rail, clamp and accessories all come from the same technical platform. Each component is sized to work with the others, which eliminates incompatibilities on site and simplifies supplies.
K2 Systems also offers a complete digital suite — K2 Base (load calculation), CrossBoard (irregular center spacing dimensioning) and K2 DocuApp (on-site installation declaration) — directly accessible from the product range pages.

2. The ranges K2 Systems available at POwR Connect

Sloping roofs

Tile roofing (flat, channel, interlocking)

• SingleRail : the reference system for all tiles. ETN L.24.08944 certified. 80% of cases resolved with the SingleHook 3S or 4S. Lateral connection to the rail without screwing onto the base plate. Also compatible with fiber cement, corrugated metal, standing seam, and bituminous roofing (via SpliceFoot).

• SolidRail : optimized for high mechanical stresses (wind, snow). ETN L.24.08944 certified. Suitable for tiles, fiber cement, corrugated sheets and standing seam roofing.

Corrugated, trapezoidal and sheet metal Trapezoidal sheet metal

• MultiRail : direct mounting via a one-component mounting rail. ETN A27T240S certified. Available in 100 mm and 250 mm.

• BasicRail : a versatile system Trapezoidal sheet metal / corrugated sheet metal. ETN A27T2506 certification.

Compact residential

• MiniRail / MiniFive : compact system for trapezoidal tiles and sheet metal, portrait or landscape orientation via MiniRail.

Rooftop terraces

• Dome 6 (S-Dome / D-Dome) : reference system Flat Roof K2. Covers all types of roofing materials — membrane (PVC, EPDM, TPO), concrete, bitumen, trapezoidal metal sheets, green roofs, and gravel. Available in single (S-Dome 6) and double (D-Dome 6) orientations, Xpress (pre-assembled) and Classic versions. ETN A27T250G certified. Optimized ballast according to the latest wind tunnel standards.

• TiltUp Vento : tiltable system at 20°, 25° or 30°, portrait or landscape orientation, compatible with large modules. Suitable for concrete, gravel and green roofs.

• Triangle/MultiAngle : adjustable tilt, portrait or landscape orientation. Suitable for membrane, concrete, and trapezoidal sheet metal. Ballasted with gravel, substrate, or concrete anchoring.

Facades and Ground

• FacadeRail : integration in Facade Portrait and landscape orientations. Commercial and public buildings.

• N-Rack : structure Ground for C&I installations. Compatible large format module.

Other product lines K2 Systems on request

K2 Systems also offers solutions for specific configurations not listed in our online catalog but proposed by our Design Office: Dome V , Dome Zero , GreenRoof Vento , Insert System , Universal KL-Clamp , WallPV (ventilated facades), Pi-Rack ( Ground large size) and Carport System .

Contact our technical team to study the solution best suited to your project.

3. The advantages of Mounting systems K2 Systems

• ETN certifications for each range : SingleRail and SolidRail (ETN L.24.08944), MultiRail (ETN A27T240S), BasicRail (ETN A27T2506), Dome 6 S/D (ETN A27T250G). Documents downloadable from each product range page — insurance coverage without any additional steps.

• Total system compatibility : K2 hooks, rails, clamps, and accessories are sized together. CrossHook 4S (ref. 2003144) on SingleRail 36 and SolidRail Light 37 without adaptation. Double-threaded screws, climbers and cable clamps set to the same tolerances. Zero cross-sourcing, zero incompatibility on site.

• Integrated digital suite : K2 Base sizes all systems (SingleRail, SolidRail MultiRail, Dome 6, WallPV facades) depending on wind/snow loads, roof type, and geometry. K2 DocuApp records installation declarations from the construction site with extended warranty. K2 Buddy guides the selection of the right system.

• Precision adjustments : SingleHook 4S — 3 positions H1 (40 / 47 / 54 mm) and 30 mm arm adjustment, range 81–111 mm, without additional components. Side connection to the rail without screwing onto the base plate.

• 12-year manufacturer's warranty on structural components — SingleHook, CrossHook, aluminum rails.

4. K2 Systems at the house of POwR Connect

POwR Connect distributes the product ranges K2 Systems ETN certified and in stock, available on the most popular models: SingleHook 3S and 4S, CrossHook, SingleRail 36, SolidRail Light 37, double threaded screws, climbers and common fixing accessories.

Prices, real-time availability, and technical documents (ETN datasheets, assembly instructions, component lists) are accessible upon logging into your professional account . B2B price list with volume discounts for multiple orders.

Our technical team is available Monday to Friday, 8:30am–12:30pm / 2pm–6pm for non-standard configurations, layout and module compatibility issues.

5. FAQ — K2 Systems at the house of POwR Connect

What is the difference between K2 SingleRail and K2 SolidRail ?
SingleRail is the reference system for tiles, with the most extensive range of hooks and compatibility with fiber cement, corrugated sheet metal, standing seam and bituminous roofing. SolidRail is optimized for high mechanical stresses. Both share ETN L.24.08944 certification and are dimensionally compatible. The selection is based on load calculation using K2 Base.

Which K2 system is suitable for a Flat Roof with a membrane (bitumen, PVC, EPDM, TPO)?
The Dome 6 is the benchmark solution: it covers all types of flat roofs, whether single or double-aspect. For a low-profile installation (slope ≤ 10°), the Dome Zero is the alternative—available upon request from our technical team. For green roofs, the GreenRoof Vento is optimized—also available upon request.

Is the CrossHook 4S (ref. 2003144) compatible with all K2 rails?
Yes. The CrossHook 4S is designed for the SingleRail system with CrossBoard, accepting variable spar spacing. It comes pre-assembled with Climber 36/50, ready to install. Compatible with SingleRail 36 and SolidRail Light 37 without modification.

Are the K2 product ranges ETN certified in France?
Yes: Single Rail / SolidRail (ETN L.24.08944), MultiRail (ETN A27T240S), BasicRail (ETN A27T2506), Dome 6 S/D (ETN A27T250G). Documents downloadable from each product range page.

How to access K2 Systems pricing on POwR Connect ?
Prices, stock levels and technical documents are visible after logging into your professional account. Registration is open to PV installers .