SkirtRail

Key Technical Features & Installation Efficiency

• Universal Frame Compatibility: Works with standard residential PV module frames ranging from 30mm to 40mm frame depths (using color-coded Universal SkirtRail Spacers).
• Single-Tool Standardization: Secures using standard 1/2” socket hardware, eliminating driver swaps on the roof edge.
• Unified Truck Inventory: Uses the same SkirtRail profile across both TopSpeed® and Ultra Rail platforms to simplify inventory management.
• Durable Design: Black powder coating delivers long-term weather resistance and visual integration.

Feature	TopSpeed® Systems	Ultra Rail Systems
Primary Function	Structural Requirement	Optional Aesthetic Upgrade
System Role	Core structural component; provides required leading-edge rail support and load distribution for the bottom row of modules.	Purely optional finish; enhances curb appeal by concealing front-facing mounting hardware, MLPE/OPE, and wiring.
Installation Necessity	Mandatory. Skipping or substituting SkirtRail invalidates standard engineering certifications and compromises system integrity.	Optional. Installers can deploy with or without SkirtRail depending on customer preference or project budget.
Mount Integration	TopSpeed® universal mounts lock directly into the SkirtRail assembly to establish array alignment and elevation.	Attaches directly to the leading edge of the array rail/module frame.
Code & Safety Compliance	Required to satisfy primary system load and structural engineering standards.	Serves as a required leading-edge barrier on upslope Type 38 module installations to maintain Class A System Fire Classification.
Tooling & Efficiency	Standardized 1/2" socket drive; single-tool roof-edge installation.	Standardized 1/2" socket drive; single-tool roof-edge installation.
Module Accommodation	Universal fit for standard 30mm–40mm frame depths.	Universal fit for standard 30mm–40mm frame depths.