Accessories for Structures
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What are accessories for solar panel structures?
They are auxiliary components—end and intermediate clamps, rail joints, terminals, wind stops, cable glands, and fasteners—that complete the structures for solar panels. They ensure module fastening, mechanical continuity of the profiles, and roof watertightness, as well as facilitating cable routing and maintenance. They are used in all subfamilies: coplanar, ground and flat roof, and metal roof.
Advantages and limitations
- Compatibility: universal clamps for standard frames (≈30–40 mm) and joints for different rail sections.
- Faster assembly: preformed parts, self-drilling fasteners, and guiding accessories reduce installation time.
- Long-term reliability: EPDM and stainless steels resist UV/corrosion; maintain watertightness.
- Limitations: combining non-equivalent parts can compromise tightening torque, expansion, or sealing; it is advisable to keep the same manufacturer line.
Applications
- Module fastening: end/intermediate clamps, anti-slip stops, and wind stops in windy areas.
- Structural continuity: rail joints and brackets to extend profiles or resolve changes in direction.
- Roof management: watertight cable glands, end caps, plugs, and anti-puncture supports on flat roofs.
- Cable management: UV clips, clamps, and ties for safe routing to boxes and protections.
How to choose the right accessories
- Type of structure: in coplanar systems, the hook/bolt and clamps are key; in flat/ground systems, joints and aerodynamic bases; in metal systems, self-drilling fasteners with EPDM.
- Module frame: check height (e.g., 30–40 mm) and compatibility of the intermediate/end clamp.
- Environment: marine/industrial environments require A4 stainless steel and high-quality EPDM.
- Wind calculation: determine clamp/stop density and overlap length in rail joints.
- Watertightness: use certified cable glands and EPDM washers; avoid improvised sealing.
Typical specifications
| Materials | Structural aluminium (profiles/clamps) and A2/A4 stainless steel (fasteners) |
| Sealing | EPDM gaskets and washers resistant to UV and ozone |
| Frame compatibility | Approx. 30–40 mm with specific intermediate and end clamps |
| Rail joints | Certified overlaps with torque-controlled fasteners |
| Cable glands | With watertight base for membrane, sheet, or tile; suitable for -40 °C to +90 °C |
| Reference standards | Eurocodes (wind/snow) and manufacturer guidelines |
Best practices
- Respect the recommended tightening torque; check for retightening during the first inspection.
- Avoid mixing fasteners; use stainless steel and suitable washers to prevent galvanic corrosion.
- Plan for thermal expansion in joints and long rails; leave working clearances.
- Protect waterproofing with rubber/HDPE bases on flat roofs.
- Route cabling through protected paths, securing at intervals with UV clips.
Quick comparisons
- Universal clamp vs dedicated: the universal clamp streamlines stock and assembly; the dedicated clamp better adjusts tolerances and aesthetics.
- Self-drilling fastener vs pre-drilled: self-drilling speeds up installation; pre-drilled is preferable for thick or multilayer sheets.
- EPDM cable gland vs generic sealing: the certified cable gland ensures watertightness and durability.
Relation to other collections
These accessories complement the Coplanar Structures, Ground and Flat Roof solutions, and the Metal Roof. For a global selection by support type, consult the parent collection Structures for Solar Panels.
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