A PV aluminum alloy hook is a structural bracket designed to secure solar mounting systems to tiled roofs. Its defining feature is its construction from high-strength aluminum alloy, offering a lightweight yet corrosion-resistant solution that is fully compatible with aluminum racking components, eliminating galvanic compatibility concerns.

Core Functional Principle: Under-Tile Anchorage with Material Compatibility

• Structural Rafter Attachment: Like its stainless steel counterpart, the aluminum hook transfers solar array loads directly into the roof's structural rafters or trusses via mechanical fasteners (lag screws) .

• Tile Preservation: The hook slides under existing roof tiles, allowing the tiles to remain intact and undisturbed. This preserves the roof's weatherproofing and aesthetic appearance without requiring tiles to be cut around the attachment point .

• Material Harmony: The defining advantage of an aluminum hook is its electrochemical compatibility with aluminum mounting rails. When an aluminum hook is bolted to an aluminum rail, there is no risk of galvanic corrosion, eliminating the need for isolation washers or specialized bi-metal separators .

Material Composition and Alloy Engineering

• High-Strength Aluminum Alloys: These hooks are manufactured from structural aluminum alloys, most commonly 6005-T5 or 6061-T6 .

• Strength: These heat-treated alloys provide tensile and yield strengths sufficient to handle the structural loads of a solar array.

• Weight: Aluminum is approximately one-third the weight of steel, making hooks easier to handle and install on roofs .