Rail-based PV mounting system with click-in rail assembly for composition shingle, tile, and standing seam metal roofs. Features a pre-installed rail fastening bolt, fully integrated bonding, click-on mid and end clamps that fit 30–40 mm module frames, a tool-free bonded internal splice, and available wire-management and MLPE-mount accessories. Supports structural-attach and direct-attach options via the Universal L‑Foot with GF‑1 flashing or Smart Foot for shingles, the Universal Tile Hook for tile, and SimpleBlock‑U for standing seam. Conforms to UL 2703/2703A and UL 3741, includes Florida Product Approval for composition-shingle applications, and carries a 25‑year warranty.