40x40 aluminium mounting rail for solar panels - length 1m
40x40 aluminium mounting rail for solar panels - length 1m — vue 2
40x40 aluminium mounting rail for solar panels - length 1m — vue 3
35x40 aluminum rail for solar panel mounting
35x40 aluminum rail for solar panel mounting
40x40 aluminium mounting rail for solar panels - length 1m
40x40 aluminium mounting rail for solar panels - length 1m — vue 2
40x40 aluminium mounting rail for solar panels - length 1m — vue 3
35x40 aluminum rail for solar panel mounting
35x40 aluminum rail for solar panel mounting

40x40 aluminium mounting rail for solar panels

By Julien Mawet · Solar PV Expert at Wattuneed • Updated April 2026
€8.23
Tax included
0200
0712971125070

The 40x40 aluminium rail is the fundamental structural component for the construction of photovoltaic mounting systems. This product is a load-bearing profile used to mechanically support solar panels on roofs or ground-mounted structures.

The length is selected simply by choosing the desired quantity: 1 unit corresponds to a 1.19 m rail and 2 units correspond to a 2.38 m rail. Each quantity ordered corresponds to a rail delivered in a single piece, cut to your specified length. Please note that the maximum length for transport is 2.40 m.

This accessory is specifically compatible with quick-release end and centre clamps as well as K2-type mounting brackets. This system creates a rigid mounting base by integrating with any mounting system requiring a 40x40mm profile for increased resistance to weather loads.

Technical advantages of the 40x40 rail:

  • Modularity: available in 1.19 m or 2.38 m sections to suit your project.
  • High strength: robust aluminium alloy capable of withstanding wind and snow loads.
  • Installation: grooves compatible with M8 bolts and hammer-head nuts.
  • Durability: oxidation-resistant material for maximum outdoor longevity.

Devis personnalisé
Recevoir une proposition claire
Nos conseillers reprennent votre sélection pour préparer un devis adapté à votre demande.

40x40 mm aluminium rail for solar panels


The 40x40 mm aluminium rail is an essential component for mounting solar panels, whether installed on a roof or on a ground-mounted structure. Designed to offer optimum mechanical strength, this profile ensures a solid, durable installation that meets the requirements of modern photovoltaic systems.

Made from high-quality extruded aluminium, it combines strength with lightness, allowing for easy handling and quick assembly. The material is naturally corrosion-resistant, ensuring a long service life even in exposed outdoor environments.





Technical specifications

  • Profile dimensions: 40 x 40 mm
  • Material: anodised aluminium
  • Application: mounting of photovoltaic panels on tiled roofs, steel roofing or ground-mounted structures
  • Compatibility: standard mounting brackets, connectors, intermediate clamps and end clamps



Features
Dimensions 40 x 40 (Nominal) mm
Linear weight 0.780 kg/m
Cross-sectional area 288.5 mm²
Moment of inertia Ixx 54,418 mm⁴
Moment of inertia Iyy 56,268 mm⁴
Top mounting M8 nut groove (Click)
Lower fixing Groove for M10 screw (Hammer head)





Available lengths and cutting

We dispatch rails up to a maximum length of 2.40 m to meet transport requirements. Beyond this length, several rails can be joined using connectors, ensuring perfect mechanical continuity.

Quantity conversion:
– 1 unit = 1.19 m of rail
– 2 units = 2.38 m of rail
Each unit corresponds to a single-piece rail, cut to precise dimensions.

Maximum shippable length: 2.40 m





Why choose our 40x40 aluminium rails?

  • Strength and durability: perfect for supporting all types of modules.
  • Easy installation: compatible with most fixing systems on the market.
  • Lightweight: makes handling on site easier.
  • Corrosion resistance: ideal for outdoor installation lasting several decades.
  • Suitable for residential and commercial installations.





Roof tile mounting installation

This video tutorial details the installation of the solar panel mounting rail on a tiled roof. Exact duration: 1 min 26 s





FAQ - 40x40 Aluminium Rail for Solar Panels

1. How are the accessories and panels fixed to this rail? +
The profile features a very practical dual mounting configuration. The upper mounting incorporates a groove specially calibrated to accommodate M8 nuts (a ‘click’ clamp system to secure the panels). The lower mounting has a groove suitable for M10 screws (hammer-head or hexagonal) to anchor the rail to roof hooks or ground structures.
2. What should I do if my row of panels requires a length greater than 2.40 m? +
For logistical and transport reasons, individual rail sections do not exceed 2.40 m. If your installation requires a greater length, simply join several rails end-to-end using standard rail joints (or connectors). This ensures perfect continuity and mechanical rigidity along the entire line.
3. How important is anodised aluminium for this product? +
Anodising is a surface treatment that significantly strengthens aluminium’s natural oxide layer. This makes the rail extremely resistant to corrosion, ambient salinity, UV rays and harsh outdoor weather conditions. Your structure retains its mechanical properties and strength for several decades.
4. How do I understand the quantity specifications when ordering? +
The rails are sold in specific cut lengths to precisely match your requirements: 1 unit ordered is equivalent to a 1.19 m rail, and 2 units are equivalent to a 2.38 m rail. Each section is delivered to you in one piece according to your chosen option, making handling and installation easier.
5. Is this 40x40 rail compatible with all brands of solar panels? +
Yes, this 40x40 mm format is the universal standard in the photovoltaic industry. It is compatible with the vast majority of clamps (mid and end) as well as with all thicknesses of solar panel frames (30 mm, 35 mm, 40 mm, etc.) available on the market.
6. Is the rail strong enough to withstand heavy snow and wind loads? +
Absolutely. Thanks to its extruded aluminium design with optimised internal geometry (as demonstrated by its high moments of inertia Ixx and Iyy), this rail offers excellent torsional rigidity. It flexes in a controlled manner under stress without ever breaking, keeping your panels secure in adverse weather conditions.
7. Can I use this rail for ground-mounted or flat-roof installations? +
Yes, it is completely versatile. Although it is very commonly used on pitched roofs (tiles, steel roofing sheets, slates), its structure allows it to be fixed just as effectively to ballast triangles for flat roofs or to metal ground-anchoring structures.
8. What tools are needed to assemble and cut the rail on site? +
As aluminium is a soft material, the rail can be cut very easily using a simple hand-held metal saw or an angle grinder fitted with a suitable disc. For assembling and tightening the fixings (M8/M10), an Allen key or a standard socket wrench is sufficient, making installation quick and straightforward.
0200

Specific References

UPC
712971125070
EAN13
0712971125070

You might also like

40x40 aluminium mounting rail for solar panels — Mounting systems

40x40 aluminium mounting rail for solar panels by Wattuneed is available in our Mounting systems catalog.

Product weight: 1.3 kg. Reference: 0200.