Solar racking is the structural mounting system that secures solar panels to your roof or to the ground. While panels get most of the attention, the racking system is equally important — it determines how your panels are positioned, how they withstand weather, and how long your installation lasts.
Roof-mounted racking is the most common type for residential installations. These systems use rails or rail-less mounts attached to your roof rafters through the roofing material. Flashing and sealants create watertight penetration points. Modern racking systems are engineered to withstand high winds, heavy snow loads, and seismic activity, with most rated for wind speeds exceeding 100 mph.
The type of racking depends on your roof material. Asphalt shingle roofs use standard penetrating mounts with lag bolts into rafters. Metal roofs often use clamp-on systems that grip standing seams without any roof penetrations. Tile roofs require specialized brackets that slip under tiles. Flat roofs typically use ballasted systems weighted down without penetrations.
Ground-mounted racking is an alternative for homeowners with limited roof space or suboptimal roof conditions. Fixed ground mounts hold panels at a set angle, while tracking systems automatically adjust panel orientation throughout the day to follow the sun's path, increasing production by 15–25% compared to fixed mounts.
Racking quality directly affects system longevity and safety. Reputable installers use racking from established manufacturers with strong warranties and proven track records in your climate. The racking should last as long as the panels themselves — 25 years or more — so investing in quality mounting hardware protects your entire solar investment.