Rail-Less Solar Module Mounting System for Reduced Installation Time
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Solution Overview
Problem
Conventional photovoltaic (PV) module mounting systems require excessive materials, labor, and time for installation, often leading to high costs and inefficiencies, particularly due to the use of rails that complicate design, engineering, and installation, and are difficult to retrofit or adjust without damaging roofs.
Innovation Solution
A rail-less PV module mounting system that uses a base mount assembly with a clamp assembly for corner-to-corner coupling, reducing material needs and allowing for easy installation and adjustment, featuring a single grounding lug and elevated seal for waterproofing, enabling efficient installation and maintenance without additional structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rail mounting systems are used, then PV modules can be mounted on roof structures, but installation time and labor costs increase significantly
Solution Approach 1:
The mounting system is divided into discrete, pre-fabricated components including rail sections, mounting brackets, and connection elements that can be independently assembled. This segmentation allows for rapid assembly without complex field engineering, directly reducing installation time while maintaining reliable mounting capability
Solution Approach 2:
Mounting brackets and connection hardware are pre-positioned and pre-assembled during manufacturing before delivery to the installation site. This preliminary action eliminates time-consuming on-site fabrication and adjustment, allowing installers to simply assemble pre-configured components, thereby reducing installation time without compromising mounting reliability
2Reliability
If conventional rail mounting systems are used, then PV modules can be securely mounted, but material costs and shipping costs increase
Solution Approach 1:
The design extracts and eliminates unnecessary intermediate components from traditional mounting systems. By using direct-attach mounting brackets that connect PV modules directly to roof structures, the system removes redundant rails and connection elements, reducing material quantity while maintaining secure mounting through optimized load-path design
Solution Approach 2:
Mounting brackets are designed as multi-functional components that simultaneously provide mechanical attachment, electrical grounding, and structural support. This universality consolidates multiple functions into single components, reducing the total quantity of materials needed while maintaining secure and reliable mounting
3Reliability
If conventional rail mounting systems are used, then PV arrays can be formed, but design and engineering complexity increases
Solution Approach 1:
The system employs standardized mounting brackets with uniform connection interfaces designed for specific local conditions (roof type, module size). This local quality approach creates simple, repeatable design patterns that reduce overall design complexity while ensuring reliable array formation through proven, location-optimized connection details
4Reliability
If conventional rail mounting systems are used, then PV modules can be mounted, but waterproofing performance decreases
Solution Approach 1:
Flashing elements serve as intermediary components between mounting brackets and roof surfaces, creating a waterproof barrier that directs water away from penetration points. This intermediary flashing system maintains the mounting function while effectively preventing water infiltration through proper drainage and sealing
Data Source
AI summary
A roof mounting system for the attachment of an article to a roof, the system comprising a plurality of PV modules each having at least one corner and a frame member, a flashing member having a top surface; an upstanding sleeve attached to the top surface of the flashing member; an elevated water seal having a borehole formed therethrough, the elevated water seal further comprising at least one screw for providing a waterproof seal between the article and the roof structure; and whereby the plurality of PV modules are interlocked in a way to provide a corner-to-corner coupling arrangement supported above the roof through the frame members of the plurality of PV modules.