K2 Systems GmbH

The German company based in Renningen (near Stuttgart) develops and produces mounting systems for PV installations. For the most part, the products are made from high-grade steel and aluminium, offering the right choice for the demands of any location – whether you choose an off-the-shelf or customized solution.

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The K2 principle

The M K2 slot nut is found in all K2 mounting systems as a central connecting element of various applications in the mounting rails.


Benefits for you

  • Easy to insert in all K2 mounting rails
  • M K2 are easy to lock following insertion. This prevents the rails from sliding down when positioned on a slant.
  • M K2 can be pushed into the rail precisely down to the exact millimetre
  • High tensile force
  • Material: Stainless steel (1.4301) / TPC
  • Thread : M8
  • Cost-effective thanks to optimal use of material

Mounting solutions for pitched roofs

MiniRail System

  • K2 MiniRail System for trapezoidal sheet metal roofs
  • High flexibility with adjustable clamp
  • Small components for optimal warehousing, transport and installation


MiniRail System (PDF)


Trapezoidal sheet metal



SpeedRail System

  • Trapezoidal installation system for roof-mounted solutions
  • Matching K2 SpeedClips and K2 SpeedLocks ensure simple and rapid installation
  • Crossbracing installation also possible


 SpeedRail System (PDF)



Trapezoidal sheet metal



Hanger Bolt System

  • Designed for corrugated roofs
  • Height-adjustable bolt attaches directly to roof rafter
  • Simple installation via hexagon head bolt and preassembled components including adapter plate


Hanger Bolt System (PDF)

CrossRail System (cross bracing)

  • Used with modules installed flat at crossbracing
  • Used as top rail together with SpeedRail
  • Quick and easy mounting rail installed from above using the K2 Climber


CrossRail System (PDF)



Tiled roofs

Trapezoidal sheet metal 

Corrugated fibre cement



SolidRail System

  • K2 roof fasteners for pan tiled roofs
  • Excellent corrosion resistance thanks to use of high-quality stainless steel components
  • Can also be installed in cross bracing (e.g. with K2 CrossRail)


SolidRail System (PDF)



Tiled roof 

Trapezoidal sheet metal

Corrugated fibre cement









Mounting solutions for flat roofs

Double Dome System

  • Innovative 10° roof-top system with double-sided orientation
  • Reduced installation time thanks to few components and mounting from above
  • Ideal for roofs with low ballast potential


D-Dome System (PDF)



Flat roofs



D-Level System

  • Roof-mounted system for roofs with low ballast potential
  • East-west facing installation and slight, two-sided 10° elevation
  • For all types of modules, thin-film and framed


D-Level System (PDF)



Flat roofs



S-Dome System

  • Innovative 10° roof-top system
  • Reduced installation time thanks to few components and mounting from above
  • Ideal for roofs with low ballast potential


Single Dome System (PDF)


Flat roofs



S-Level System 2.11

  • Low ballast on-roff system for variable orientation of south-east to south-west
  • Available with 20° elvation angle, option of K2 FlatRail or K2 SpeedRail as base
  • Installation-friendly thanks to partially pre-assembled components and screw connection from above


S-Level System 2.11 (PDF)


Flat roofs



Mounting solutions for open land

N-Rack System

  • Suitable for all ground types, available as screw-in and foundation version
  • Can be used with all module types, both framed and thin-film
  • System individually assembled and calculated as per requirements


N-Rack System (PDF)



Ground mounted systems



N-Rack System Mono

  • K2 N-Rack Mono system for concrete foundations
  • Installation-friendly due to perfectly coordinated components and system kit (KIT)
  • Structural analysed for different European countries


N-Rack System Mono (PDF)

T-Rack System

  • Ground-mounted pile-driven system
  • Straightforward system components for shorter assembly time
  • Modular design enables any system size


T-Rack 2.12 System (PDF)

A-Rack Box

  • All system components in a box for open land installations 5-500 kWp
  • Easy mounting thanks to matching components included in the kit system
  • Attractive price performance ratio at a low logistical effort

A-Rack Box System (PDF)



Ground mounted systems