END CAP FOR PV PROFILES

The ULAMEX End Cap for PV Profiles is a protective cover manufactured from UV-stabilised PA6 polyamide, designed to seal the open ends of aluminium PV mounting rails after installation. Available in sizes matching the 40×40 mm and 80×40 mm ULAMEX profile series, these press-fit caps prevent debris, water, and insect ingress into the rail channel while eliminating the sharp aluminium edges that pose a cut hazard during maintenance and cleaning operations.

Installation Guidelines

Align the end cap with the open rail end, ensuring the cap orientation matches the profile cross-section. Push the cap firmly into the rail end by hand — the cap is designed with a slight interference fit that snaps into the channel opening and holds by friction. No tools are required for standard installation. If the cap is difficult to insert (e.g., after rail cutting that left burrs on the inside edges), lightly deburr the rail end with a file before fitting.

End caps should be installed as the final step in the rail assembly, after all module clamps, connectors, and wiring have been completed. Install one cap on each exposed rail end — typically two per rail (both ends), unless one end terminates at a wall or structural element.

Applications

• Rooftop PV installations — sealing exposed rail ends on pitched and flat-roof solar arrays
• Ground-mount solar farms — capping rail ends on post-mount structures exposed to ground-level debris and wildlife
• Carport PV canopies — aesthetic finishing of visible rail ends in overhead canopy installations
• Maintenance safety — eliminating sharp-edge cut hazards for technicians during cleaning and inspection

Material Properties

PA6 polyamide (Nylon 6) provides the ideal combination of properties for an outdoor PV accessory: high impact resistance prevents cracking during installation and accidental contact, while the UV stabilisation additive protects against embrittlement from decades of solar radiation exposure. The operating temperature range of -40 to +120 °C covers all climatic conditions encountered in European PV installations, including the elevated temperatures on south-facing dark-coloured rail surfaces in summer.

Unlike PVC or ABS alternatives, PA6 maintains its elastic memory over time — the press-fit retention force remains consistent even after years of thermal cycling between extreme winter and summer temperatures.

Compatibility

ULAMEX end caps are designed for:

• ULAMEX PV profiles 40×40 mm — 40×40 end cap size
• ULAMEX PV profiles 80×40 mm — 80×40 end cap size
• Cut-to-length rails — caps fit rails cut on-site with standard aluminium cutting tools

Frequently Asked Questions

Q: Are end caps mandatory for PV installations?

While not structurally required, end caps are recommended by all major mounting system manufacturers and required by some certification bodies for occupational safety (eliminating sharp-edge hazards). They also prevent water pooling and debris accumulation inside the rail channel, which can cause premature corrosion or drainage issues.

Q: Black or grey — which colour?

Choose based on the rail and roof colour for the most inconspicuous appearance. Black blends with dark-anodised or black-powder-coated profiles and dark rooftops. Grey matches natural-finish (mill-finish) aluminium profiles and lighter roof surfaces.

Q: Can end caps be removed and reused?

Yes. Pull the cap out of the rail end by hand or with pliers. PA6 polyamide is resilient and maintains its shape through multiple insertion-removal cycles. End caps should be removed temporarily when extending a rail run or adding a profile connector.

Need end caps for your PV profiles? Request a Quote | +48 504 424 761 | [email protected]