Module clamps

Centre clamps hold two modules side by side on the rail, whilst end clamps hold the last module in a row. The clamps from K2 Systems and Solitek fit module frames ranging from 25 to 50 mm, many of which are black.

14530802 K2 Systems Terminal Block MC 25–40 Black - 2004148

The K2 Clamp MC Black is a universal center clamp that, thanks to its flexible clamping range of 25 to 40 mm, is suitable for almost all standard module frame heights. Thanks to its convenient click function, it can be secured to any point on the mounting rail in a matter of seconds. The black anodized design ensures an aesthetically pleasing and discreet appearance for your photovoltaic system. However, it is not compatible with the K2 Dome 6 system.

€2.30
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
14531342 K2 Systems Universal Terminal Block 25-40 Black Anodized - 2004545

The K2 Clamp EC 25-40, Black is a black anodized universal module end clamp for solar panels with a frame height of 25–40 mm. Compatible with many K2 mounting systems (except K2 Dome 6). Made of aluminum, Badamid B70, and A2 stainless steel for maximum stability.

€2.85
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
14530358 K2 Systems DomeClamp Center Clamp 30–50 mm Black - 2002609

DomeClamp Center Clamp: Ideal for K2 Dome 6, Zero, and MiniRail systems. Sturdy aluminum and stainless steel. Perfect for flat and sloped roofs. Product No. 2002609.

€1.89
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
14530359 K2 Systems DomeClamp End Clamp 30–50 mm Black - 2002610

DomeClamp End Clamp: For K2 Dome 6, Zero & MiniRail. Made of aluminum & stainless steel. Ideal for flat & sloped roofs. Product No. 2002610. Safe & robust.

€2.15
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
14530363 K2 Systems OneMid 30-42 Set Black - 2003072

Universal Center Clamp OneMid 30–42 mm: Quick-click mechanism, black anodized. Ideal for solar panels. Product No. 2003072. Reliable mounting!

€1.99
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 · Parcel shipping
- Pickup in Karlsruhe possible
14530355 K2 Systems DomeClamp Center Clamp 30–50 mm - 2002558

DomeClamp Center Clamp 30–50 mm: For K2 Dome 6, Zero, and MiniRail. Made of aluminum and stainless steel. Ideal for flat and sloped roofs. Product No. 2002558. Safe and sturdy.

€1.65
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
14530356 K2 Systems DomeClamp End Clamp 30–50 mm - 2002559

DomeClamp End Clamp: Compatible with K2 Dome 6, Zero, and MiniRail. Made of aluminum and stainless steel. For module frame heights of 30–50 mm. Product No. 2002559.

€1.83
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
14530781 K2 Systems TerraGrif K2MI Duo 18 - 2003542

K2 TerraGrif K2MI Duo 18: Grounding accessory for DomeClamp & K2 Dome 6 system, 301 TA stainless steel. Product No. 2003542. Equipotential bonding for flat roofs.

€1.79
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
14530446 Solitek Terminal Block, Black E.B.-150mm

SoliTek has tested its modules using the Alumero CLICK 6.8 clamps. At least 4 clamps should be used to secure the modules to the mounting rails. The metal components of the module clamps must not come into contact with the front or rear glass panes.

€7.00
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
14530451 Solitek Center Terminal M.B.-150mm

SoliTek Click 6.8 EPDM L-150 Black Center Clamp for Solitek.

€4.80
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 · Parcel shipping
- Pickup in Karlsruhe possible
14531869 K2 Systems XS Module Center Terminal Set 34–38 mm - 1003586

The K2 XS Center Clamp (manufacturer’s part number: 1003586) is a high-quality center clamp set specifically designed for the precise mounting of solar panels on K2 systems. Thanks to its silver anodized finish, the clamp blends in perfectly with systems featuring silver module frames.

€1.70
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
14532037 K2 Systems Universal Terminal Block 25-40 - 2004543

The K2 Clamp EC 25-40 is a universal module end clamp for solar panels with a frame height of 25–40 mm. Compatible with many K2 mounting systems (except K2 Dome 6). Made of aluminum, Badamid B70, and A2 stainless steel for maximum stability.

€2.85
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

Module clamps from K2 Systems and Solitek for frame heights of 25 to 50 mm, plus clamps for frameless glass-glass modules and TerraGrif contact elements for equipotential bonding. Three specifications are decisive for the choice: frame height, mounting system and colour.

Clamping range and system

The clamping range must cover the frame height specified in the module data sheet. The range includes 25–40 mm (Clamp MC and Universal End Clamp Clamp EC), 30–42 mm (OneMid and OneEnd), 30–50 mm (DomeClamp) and 34–38 mm (Centre Clamp XS). The DomeClamp is part of the Dome 6 flat-roof system; K2 also lists several versions for the MiniRail. According to K2, however, Clamp MC, Clamp EC and OneMid are not intended for use with Dome 6. To match black module frames, most clamps are available in black. The 150 mm-long Solitek clamps secure frameless glass-glass modules from SoliTek to the laminate.

How many clamps are needed per row

Centre clamps are positioned between two modules, whilst end clamps are situated at the edge of the row. On a pitched roof with two rails per row, this results in four end clamps and two centre clamps per module joint. The module manufacturer’s installation instructions specify where clamping may take place on the frame. A qualified electrician determines whether TerraGrif elements are required for equipotential bonding.

The clamps are mounted on the mounting rails or within the flat-roof mounting system. The frame height and design of the solar panels are specified in the data sheet. The substructure provides an overview of all components.