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S:FLEX LEICHTmount RAIL 2.1 with extremely low surface load
The main advantages of the LEICHTmount RAIL 2.1 S/EW:
- System with General Technical Approval
- Extremely low surface load and system installation without roof penetration possible
- Low ballast due to systematic aerodynamic optimisation of the design
- Foot plates attached with a click to the ground rails to protect the roof skin from plasticizer migration
- Better pressure load distribution by increasing the number of foot plates
- Independently tested for wind safety in accordance with German and US standards
- Optimised rear ventilation for maximum energy yield
- Optimised cable management with conduit covers and edge clips
- Integrated cable ducts and covers that make cable routing possible even after system installation without additional expense or effort
- Integrated fall protection (optional)
- Roof drainage is ensured
- Capable of carrying lightning currents in accordance with DIN EN 62561 (VDE 185-561-1):2013-02
- We will gladly create the structural design for our customer's projects if required – the documentation we provide includes the structural analysis and the ballast plan
LEICHTmount RAIL 2.1 S for south orientation
Components
LEICHTmount RAIL 2.1 S ground rail
Our ground rail with attached foot plates ensures even load distribution over the roof.
LEICHTmount RAIL 2.1 base
The base serves as a lower receptacle for modules and module clamps.
LEICHTmount RAIL 2.1 tower
The tower is clicked on the floor rail and serves as an upper receptacle for modules and module clamps
LEICHTmount RAIL 2.1 foot plate
Foot plates attached with a click to the ground rails to protect the roof skin from plasticizer migration.
End and mid clamps
S:FLEX module clamps have an extremely wide clamping area and are therefore suitable for all standard modules and frame heights of 30-50 mm. High torsion resistance and our latest, ultra-smooth one-click technology make installation a snap.
Data
| Application |
| Flat roofs – roof pitch in general up to 5°; roof pitch > 5° up to 10° has to be checked specifically per project |
| Roofing type |
| Foil, bitumen, gravel, greenery, concrete |
| Orientation |
| South |
| Module pitch |
| 10° / 15° |
| Module size (L x W) |
| 1640 – 2340 mm x 985 – 1300 mm |
| System surface load |
| From 7.5 kg/m², incl. module & ballast |
| Building height |
| Max. 25 m (taller buildings up to 50 m on request) |
| Distance to edges |
| Installation in the roof edge and corner regions is possible |
| Wind load |
| Up to 2.4 kN/m² |
| Snow load |
| Up to 5.4 kN/m² |
| System size |
| Max. area size 20 x 20 m |
Downloads
A data sheet with technical information about our LEICHTmount RAIL systems is available for download here:
S:FLEX LEICHTmount RAIL 2.1 S/EW
For assembly instructions, please click here:
S:FLEX assembly instructions LEICHTmount RAIL 2.1 S
Planning
If you would like to take advantage of our planning support, you can:
– use our planning aid
– fill out our online form
– send an e-mail to
– or call us: +49 (0)761 888 56 08 0
LEICHTmount RAIL 2.1 EW for east/west orientation
Components
LEICHTmount RAIL 2.1 EW ground rail
Our ground rail with attached foot plates ensures even load distribution over the roof.
LEICHTmount RAIL 2.1 base
The base serves as a lower receptacle for modules and module clamps.
LEICHTmount RAIL 2.1 tower
The tower is clicked on the floor rail and serves as an upper receptacle for modules and module clamps
LEICHTmount RAIL 2.1 foot plate
Foot plates attached with a click to the ground rails to protect the roof skin from plasticizer migration.
End and mid clamps
S:FLEX module clamps have an extremely wide clamping area and are therefore suitable for all standard modules and frame heights of 30-50 mm. High torsion resistance and our latest, ultra-smooth one-click technology make installation a snap.
Data
| Application |
| Flat roofs – roof pitch in general up to 5°; roof pitch > 5° up to 10° has to be checked specifically per project |
| Roofing type |
| Foil, bitumen, gravel, greenery, sheet concrete |
| Orientation |
| East/west |
| Module pitch |
| 10° / 15° |
| Module size (L x W) |
| 1550 – 2400 mm x 985 – 1300 mm (EW 10°) 1550 – 2400 mm x 985 – 1080 mm (EW 15°) |
| System surface load |
| From 9.5 kg/m², incl. module & ballast |
| Building height |
| Max. 25 m (taller buildings up to 50 m on request) |
| Distance to edges |
| Installation in the roof edge and corner regions is possible |
| Wind load |
| Up to 2.4 kN/m² |
| Snow load |
| Up to 5.4 kN/m² |
| System size |
| Max. area size 20 x 20 m |
Downloads
You can download a data sheet with technical information about our LEICHTmount RAIL systems here:
S:FLEX LEICHTmount RAIL 2.1 S/EW
The assembly instructions are also available for download:
S:FLEX assembly instructions LEICHTmount RAIL 2.1 EW
Planning
If you would like to take advantage of our planning support, you can:
– use our planning aid
– fill out our online form
– send an e-mail to
– or call us: +49 (0)761 888 56 08 0
The lightweight alternative
Aerodynamic, lightweight and totally wind-safe installation possible without roof penetration. The S:FLEX LEICHTmount RAIL 2.1 mounting system for framed PV modules is the ideal solution for flat roofs – even with a low load-bearing capacity.
Both variants – the System S for the traditional south-facing orientation and the EW variant for maximum east/west coverage – deliver outstanding economy. The use of only a few, pre-assembled components, most of which can be connected easily and securely with one click, makes installation easy, efficient and fast. No need for time-consuming measuring, drilling or cutting on the roof.
In addition to the wide new foot plates clicked onto the substructure, the tool-free installation without self-drilling screws or sharp-edged components provides additional protection – even for the most delicate roof membrane.
The S:FLEX LEICHTmount CF for south orientation (S) or east/west coverage (EW)
The main advantages of the LEICHTmount CF S/EW:
- Patented, statically optimised systems
- Wind-tunnel tested to the latest standards at up to 250 km/h
- S variant with tilt angle of 5°, 10° or 15° and optimised row spacing for an 18° or 25° shading calculation area available
- Fast and easy installation
- Lower transport costs due to minimal use of materials
- Includes fleece pads proven via durability tests
- Certified module clamps with earthing pins that provide system earthing in accordance with international standards
- Problem-free water drainage and optimal module back-ventilation
- Optimised wind suction openings for reduced ballast
- Also suitable for roof-edge zones
- Also available as a heavy duty, easy-to-install Alpine version
- Certified to UL 2703, fire tested to UL 1703, tensile and load tested to IEC 61215
- We will gladly create the structural design for our customer's projects if required – the documentation we provide includes the structural analysis and the ballast plan
LEICHTmount CF S for south orientation
Components
LEICHTmount CF S supports
These supports consist of optimised materials and are supplied with a 5°/10°/15° tilt angle. Our rail-less support system offers flexible mounting options, even for uneven roofs or near interfering elements.
LEICHTmount CF S ballast tray
The use of our ballast trays enables uniform distribution of the ballast and prevents the formation of concentrated loads. Particularly suitable for use in areas with high wind loads.
LEICHTmount CF S module clamps
Height-adjustable module and end clamps for all frame heights from 30–46 mm. Install the clamps directly on the supports with standard earthing pins.
Data
| Application |
| Flat roofs – roof pitch up to 4° |
| Orientation |
| South |
| Module pitch |
| 5° / 10° / 15° |
| Shading calculation area |
| Module pitch 5° : 18° / Module pitch 10° and 15° : 18° or 25° |
| Module size |
| All common module sizes with frame heights from 30–46 mm |
| Surface load |
| Approx. 10 kg/m² of covered roof surface |
| Building height |
| Max. 25 m |
| Distance to edges |
| Installation in the roof edge and corner regions is possible |
| Wind load |
| Suction load up to 2.4 kN/m² |
| Snow load |
| Standard version, up to bis 2.4 kN/m² / Alpine version up to 4.4 kN/m² |
| System size |
| The maximum module array size is 120 modules (12 modules per row and 10 consecutive rows) |
Downloads
Assembly instructions can be downloaded here:
S:FLEX assembly instructions for LEICHTmount CF S
For the data sheet please click here:
S:FLEX data sheet LEICHTmount CF S/EW
Planning
Information about our Planning Tool is available HERE.
If you would like to take advantage of our planning support, you can:
– fill out our online form
– send an e-mail to
– or call us: +49 (0)761 888 56 08 0
LEICHTmount CF EW for east/west orientation
Components
LEICHTmount CF EW supports
These supports consist of optimised materials and are supplied with a 10° tilt angle. Our rail-less support system offers flexible mounting options, even for uneven roofs or near interfering elements.
LEICHTmount CF EW ballast tray
The use of our ballast trays enables uniform distribution of the ballast and prevents the formation of concentrated loads. Particularly suitable for use in areas with high wind loads.
LEICHTmount CF EW module clamps
Height-adjustable module and end clamps for all frame heights from 30–46 mm. Install the clamps directly on the supports with standard earthing pins.
Data
| Application |
| Flat roofs – roof pitch up to 4° |
| Orientation |
| East/west |
| Module pitch |
| 10° |
| Shading calculation area |
| 18° |
| Module size |
| All common module sizes with frame heights from 30–46 mm |
| Surface load |
| Approx. 15 kg/m² of covered roof surface |
| Building height |
| Max. 25 m |
| Distance to edges |
| Installation in the roof edge and corner regions is possible |
| Wind load |
| Up to 2.4 kN/m² |
| Snow load |
| Standard version, up to bis 2.4 kN/m² / Alpine version up to 4.4 kN/m² |
| System size |
| Variable arrangement as per the project report – the maximum module array size is 192 modules (12x2 modules per row and 8 consecutive rows) |
Downloads
Assembly instructions can be downloaded here:
S:FLEX assembly instructions for LEICHTmount CF EW
For the data sheet please click here:
S:FLEX data sheet LEICHTmount CF S/EW
Planning
Information about our Planning Tool is available HERE.
If you would like to take advantage of our planning support, you can:
– fill out our online form
– send an e-mail to
– or call us: +49 (0)761 888 56 08 0
The aerodynamic alternative
On flat roofs where roof penetration is not possible or desired but the roof construction and load-bearing capacities do not permit ballasting, an aerodynamic, largely ballast-free solution is a viable alternative.
Installed quickly and removable without a trace – yet as stable, storm-proof and durable as ballasted mounting systems or those that are firmly connected to the roof membrane – our aerodynamically designed frames are based on a well-thought, pioneering concept. In particular, our LEICHTmount systems, which can be installed in both south-facing and east-west orientations, come highly recommended as innovative and uncomplicated flat-roof installations.
