The ULAMEX silver and anodized end clamp secures the outermost solar panels in any photovoltaic array, providing a clean, finished edge while delivering the same mechanical clamping force as a middle clamp. Every PV installation requires solar panel end clamps — two per rail line at each array edge — to prevent the final modules from shifting under wind, snow or thermal cycling loads. Manufactured from EN AW-6060 T6 anodized aluminum these end clamps protect the panel frame from scratches and galvanic corrosion while distributing clamping pressure evenly. Available in both silver (natural anodized) and black anodized finishes, ULAMEX end clamps match any module aesthetic and are supplied with M8 T-bolt hardware ready for immediate installation on standard T-slot mounting rails.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Aluminum EN AW-6060 T6, anodized |
| Available sizes | 30 mm, 32 mm, 35 mm, 37 mm, 40 mm, 45 mm, 50 mm |
| Finish options | Silver anodized (natural) / Black anodized |
| Fastener | M8 T-bolt + sliding nut (stainless steel A2) |
| Recommended torque | 12–14 Nm (M8 bolt) |
| Clamp type | End clamp (array edge) |
| Rail compatibility | Standard T-slot PV profiles (40×40 mm, 45×40 mm) |
| Corrosion protection | Anodized aluminum |
| Operating temperature | −40 °C to +85 °C |
| Standards | Eurocode wind/snow load compatible, CE |
How It Works — Installation Guide
To install a solar panel end clamp, insert the M8 T-bolt into the T-slot channel of your PV mounting rail and slide it to the end position beyond the last module frame. Place the end clamp body over the bolt so that the gripping surface contacts the outer edge of the panel frame. Tighten to 12–14 Nm with a calibrated torque wrench. The end clamp grips a single panel frame — unlike a middle clamp that bridges two adjacent modules. This single-sided grip means the end clamp experiences asymmetric loading, which is why proper torque and correct sizing are especially critical at array edges where wind uplift forces are highest. Always verify that the clamp sits flush against the panel frame before final tightening.
Compatible Components
ULAMEX end clamps work hand-in-hand with our full range of photovoltaic mounting hardware. Use them alongside middle clamps in the interior of the array, mounted on aluminum PV profiles (40×40 mm and 45×40 mm). Attach rail profiles to the roof structure with roof hooks, and complete the assembly with T-bolts, sliding nuts and additional PV fasteners. For flat roof projects, pair end clamps with ballast mounting systems and PV tilt triangles for non-penetrating installations.
Application Scenarios
Pitched roof arrays: End clamps are placed at the left and right boundaries of every module row. On pitched roofs, these positions coincide with the highest wind uplift zones — particularly at roof ridges and gable ends. The robust clamping force of the EN AW-6060 T6 aluminum body, combined with the clamp body resists pull-out forces in all standard wind zones across Europe.
Flat roof ballast systems: On commercial flat roofs, end clamps secure the outermost modules of ballast-mounted arrays. The black anodized finish option is especially popular on flat roof installations where aesthetic uniformity with all-black modules is desired by building owners.
Ground-mounted solar farms: In large-scale ground-mount installations, end clamps are used at every row boundary. Given the higher exposure to wind in open-field environments, six clamps per module (including end clamps at the edges) are commonly specified by structural engineers.
Commercial and industrial rooftops: Warehouses, logistics centres and factory roofs frequently feature long module rows that require end clamps only at the very edges — maximizing the cost-efficient use of middle clamps throughout the interior of each row.
Sizing Guide — Selecting the Correct End Clamp
End clamp sizing follows the same principle as middle clamps: the gripping height must match the panel frame thickness. Consult the module datasheet for the frame height — typical values are 30, 32, 35, 37, 40, 45 or 50 mm. For a row of N modules, you need exactly 2 end clamps per rail line (one at each end), regardless of how many modules are in the row. With two rail lines (top and bottom of the module), that totals 4 end clamps per row. The interior positions are all filled with middle clamps, which secure two modules each. Order end clamps in the same size and finish as your middle clamps for a uniform, professional installation appearance.
Standards and Certifications
ULAMEX end clamps are produced from EN AW-6060 T6 aluminum conforming to European material standards. Anodizing quality meets Qualanod specifications. The clamp design is suitable for installations calculated under Eurocode EN 1991 wind and snow load parameters. ULAMEX holds EN 1090 certification for the execution of aluminum structures, providing full material traceability. Mill test certificates (EN 10204 Type 3.1) can be supplied on request for project compliance documentation. The stainless steel A2 T-bolt and sliding nut hardware complies with ISO 3506 for corrosion-resistant fasteners.
Why Choose ULAMEX
As a B2B metal wholesaler since 1988, ULAMEX combines deep industry knowledge with competitive wholesale pricing. We deliver solar panel end clamps across Europe by pallet — alongside the complete range of PV profiles, middle clamps, fasteners, roof hooks, ballast trays and tilt triangles. Single-source procurement means fewer suppliers, lower logistics costs and consistent quality across every component in your PV mounting system. Request a quote for your project requirements.
Frequently Asked Questions
How many end clamps do I need for my solar installation?
You need exactly 2 end clamps per rail line at each end of the module row. For a standard two-rail setup (top and bottom of the panel), that is 4 end clamps per row. All interior positions use middle clamps. The total end clamp count depends on how many separate rows your array has, not on the total number of modules per row.
Can I use end clamps in the middle of an array instead of middle clamps?
Technically, two end clamps placed back-to-back could replace one middle clamp at an interior position, but this is not recommended. It doubles the hardware, increases installation time and creates an unnecessary gap between modules. Always use middle clamps at interior junctions and reserve end clamps for the array edges where they are designed to perform.
What happens if I use the wrong clamp size?
If the clamp is too small, the clamp will not make full contact with the panel frame, reducing clamping force and potentially allowing the module to shift under wind load. If the clamp is too large, the bolt may bottom out before the clamp achieves adequate contact. Always match the clamp size to the exact panel frame height specified in the module manufacturer’s datasheet.
Are ULAMEX end clamps available in black anodized finish?
Yes. ULAMEX end clamps are available in silver (natural anodized) and black anodized finishes. The black variant is designed to complement all-black solar panels that are increasingly used in both residential and commercial installations for aesthetic reasons and to create a seamless, modern rooftop appearance.