Mounting rails & connectors

Mounting rails from K2 Systems support the modules on the roof: SingleRail 36 and SolidRail Light in lengths from 2.40 to 5.95 m, BasicRail 22 for trapezoidal sheet metal, plus rail connectors and cross-connections for longer rows of modules.

14530388 K2 Systems SingleRail 36: 4.80 m - 2004393

K2 SingleRail 36 4.80 m: Sturdy mounting rail for various roof types. Aluminum EN AW-6063 T66. Product No. 2004393. Stable & durable.

€36.50
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530384 K2 Systems SingleRail 36: 5.95 m - 2004260

K2 SingleRail 36: 5.95 m from K2: Sturdy mounting rail for solar panels. Product No. 2004260. Length 5.95 m. Ideal for flat and sloped roofs. Made of aluminum!

€39.95
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530894 K2 Systems SingleRail 36: 2.40 m - 2003458

SingleRail 36 - 2.40 m mounting rail for flat and sloped roofs. Versatile, made of EN AW-6063T66 aluminum. Product No. 2003458. Robust & flexible.

€19.99
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530387 K2 Systems BasicRail 22: 4.80 m - 2004278

K2 BasicRail 22; 4.80 m: Versatile mounting rail for PV systems on trapezoidal sheet metal and dome systems. Aluminum EN AW-6063 T66. Product No. 2004278. Robust.

€25.95
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530829 K2 Systems SingleRail 36; 3.65 m - 2004258

The K2 SingleRail 36 mounting rail, with a length of 3.65 m, is a sturdy and versatile rail for photovoltaic mounting systems. Manufactured from high-quality EN AW 6063-T66, it is suitable for flat and sloped roofs and is compatible with several K2 system solutions.

€26.90
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530389 K2 Systems SolidRail Light: 4.80 m - 2004395

K2 SolidRail Light 4.80m: Premium mounting rail for sloped roofs. Aluminum EN AW-6063 T66. Product No. 2004271. Durable & flexible.

€39.90
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14530844 K2 Systems BasicRail 22: 5.95 m - 2004279

The K2 BasicRail 22 is a high-quality aluminum mounting rail specifically designed for mounting photovoltaic systems on trapezoidal sheet metal and sandwich panel roofing.

€36.80
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Freight shipping
- Pickup in Karlsruhe possible
14531314 K2 Systems SolidRail Light: 2.40 m - 2003461

The mounting rail with structural analysis, integrated into the K2 Base System, offers a flexible solution for a wide variety of roof mountings. With a length of 2.40 m, it provides adaptable design options for various construction projects.

€27.90
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
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- Pickup in Karlsruhe possible
14530345 K2 Systems SolidRail Rail Connector Set Ultra Light and Light - 1004107

Rail Connector Set for SolidRail: Quick connection of K2 SolidRail XS & Light. Includes screws. Product No. 1004107. Sturdy & durable.

€3.80
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
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- Pickup in Karlsruhe possible
14530344 K2 Systems Basic Connector Set BasicRail - 1003571

K2 Rail Connector Set BasicRail: Securely connects BasicRails. Includes screws. Aluminum & stainless steel. Product No. 1003571. Flexible & sturdy.

€1.20
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
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- Pickup in Karlsruhe possible
14531167 K2 Systems Dome FlatConnector Set (Rail Connector Set for SpeedRail and FlatRail) - 1006039

Rail connector set for the K2 Dome 6 system and the K2 Dome Zero system (flat roof). Mounting hardware included. Material: Aluminum EN AW 5754 H111, Stainless Steel A2

€3.69
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
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- Pickup in Karlsruhe possible
14530346 K2 Systems SolidRail Cross-Connection Kit - 1004110

SolidRail Cross Connector Set by K2: Connects cross rails at a 90° angle. Product No. 1004110. For SolidRail Light, Medium, Alpin. Accessories included!

€3.94
0 % VAT under § 12 Abs. 3 UStG Only with the operator declaration at checkout – without it, 19 % VAT is added.
- In stock Delivery by 18.10.2026
- Plus shipping costs · Parcel shipping
- Pickup in Karlsruhe possible

Mounting rails in three profiles from K2 Systems and the connectors that go with each profile: SingleRail 36 in four lengths, one of which is also black anodised, SolidRail Light and BasicRail 22. The rails rest on the roof mounting and support the module clamps.

Which profile belongs to which system

SingleRail 36 (39.4 × 36 mm): for flat and pitched roofs, mounted on SingleHook and CrossHook roof hooks.
SolidRail Light (39.5 × 37 mm): for pitched roofs in the SolidRail system, for example on the SolidHook 4S+ roof hook.
BasicRail 22 (63 × 22.5 mm): quick-fit rail for trapezoidal sheet metal and the base rail of the Dome flat-roof system.

Rail connectors are only compatible with their respective profiles. The set for SingleRail 36 includes four M8 hammer-head screws; the set for SolidRail Light and Ultra Light includes two M10 hammer-head screws; and the BasicRail set includes two Torx screws. The SolidRail cross-connection set joins two layers of rails at right angles when cross-rails are positioned on top of base rails.

Planning lengths and joints

The rail length corresponds to the width of the module array; longer rows are created using several rails with connectors. For BasicRail, K2 specifies a thermal break every 9.60 m and no module clamp above the connector. The structural analysis determines how many metres of rail and how many fixing points a roof requires.

The rail is secured using roof hooks and anchor bolts, whilst the modules are held in place by centre and end clamps. Clips and BasicLock for the BasicRail system are used on trapezoidal and sheet metal roofs, whilst the FlatConnector for domes is used for flat-roof mounting systems.