Rail-Attached Bottom Clamp for Tool-Free Solar Panel Mounting
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Solution Overview
Problem
Solar panel system installers face challenges such as high material costs, complexity of installation, and servicing due to existing solar panel mounting systems, particularly with over-the-panel clamps which are costly and complex.
Innovation Solution
A new bottom clamp system fabricated from a single piece of sheet metal, without threaded fasteners or additional components, featuring slots, tabs, and an upper tab that engages the solar panel's return flange under tension, allowing for tool-free installation and easy removal, and can be preassembled with solar PV panels for simplified installation and reduced labor costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If over-the-panel clamps are used to secure solar panels to rails, then the panels can be firmly mounted, but the clamps are visible from the top which creates an undesirable appearance and the material costs and installation complexity are high
Solution Approach 1:
The clamp is inverted from the conventional over-the-panel design to an under-the-panel design. The U-shaped body is positioned beneath the solar panel, with the open end facing upward to receive the panel's return flange. This inversion hides the clamp from view while maintaining secure mounting, directly resolving the contradiction between mounting reliability and aesthetic appearance.
Solution Approach 2:
Multiple functional elements are merged into a single integrated clamp structure. The U-shaped body, engagement tabs, and spring mechanism are combined into one piece that simultaneously provides structural support, panel engagement, and securing force, thereby reducing device complexity while maintaining mounting firmness.
2Reliability
If traditional bottom clamps with multiple components are used, then secure mounting is achieved, but material costs increase and installation becomes complex
Solution Approach 1:
The clamp design merges multiple traditional components (U-shaped body, engagement tabs, spring mechanism) into a single integrated structure. This consolidation reduces the number of parts that need to be manufactured separately and assembled, thereby improving ease of manufacture while maintaining mounting security through the combined functional elements.
Solution Approach 2:
The single-piece clamp is designed with segmented functional zones: the U-shaped body for structural support, the engagement tabs for panel attachment, and the spring mechanism for securing force. This segmentation of functions within a unified structure allows simple manufacturing while achieving reliable mounting.
3Reliability
If bottom clamps require threaded fasteners and additional components, then secure attachment is achieved, but installation complexity and time increase
Solution Approach 1:
The clamp incorporates a spring mechanism that automatically engages and secures the solar panel return flange when the panel is placed on the rail. The spring-loaded tabs self-adjust and self-lock into position, eliminating the need for manual fastener installation and additional components, thereby improving installation speed while maintaining attachment security.
Solution Approach 2:
The traditional threaded fastener system is replaced with a spring-loaded mechanical engagement system. The spring mechanism provides continuous securing force through elastic deformation, substituting the multi-step fastening process with a single placement action, thus increasing productivity while ensuring reliable attachment.
4Reliability
If conventional bottom clamps are used that require bottom access for installation, then secure mounting is achieved, but servicing becomes difficult in rooftop installations
Solution Approach 1:
The clamp design inverts the access direction by positioning the open end of the U-shaped body upward, allowing installation and servicing from the top side where the solar panel is accessible. This eliminates the need for bottom access in rooftop installations while maintaining mounting stability through the same secure engagement mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces material costs, simplifies installation, and enhances servicing by providing a cost-effective, easy-to-install, and versatile mounting system that can be used in various applications, including rooftop installations without requiring bottom access.
Implementation Method 1
The spring is engaged to a bottom of the U-shaped body and engages the return flange under tension
Data Source
AI summary
A device, system, and method for mounting solar PV panels to rails. The device can include a bottom clamp that secures the solar PV panel to the rail by creating tension between the return flange of the solar panel frame and the rail. The bottom clamp can be structured to snap onto the rail sides. Mid-clamp versions of the bottom clamp can be so structured that the solar PV panel and bottom clamps can be removed by prying the opposing sides of the bottom clamp from above the solar PV panels.