On clay or concrete tile roofs, hooks transfer array loads into the rafter — not into the tile alone. Measure tile type, batten layout and rafter centers before choosing a hook family.
Waterproofing: every penetration needs a compatible seal or flashing detail. Skip this and leaks show up months after handover.
Load path: wind uplift often governs. Share site wind zone and module layout so we can suggest hook density and stainless vs coated steel.
Pair hooks with the right rails, splices and module clamps as one kit — we supply matched hardware from the Handan factory.