U-Shaped Solar Panel End Clamp for Tool-Free Bonding
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Solution Overview
Problem
Existing solar panel installation methods are cumbersome and aesthetically unsatisfactory, as they require special tools and expose mid-clamps on the perimeter of solar panel arrays, failing to provide a simple, tool-free, and aesthetically appealing solution for securing and grounding solar panels to rail support structures.
Innovation Solution
A u-shaped end clamp with top and bottom jaws that bi-directionally fit within rail guides, featuring raised portions for electrical bonding and gripping the solar panel and rail surfaces, allowing tool-free installation and hiding the clamp from view, with an alternate embodiment using a t-bolt for additional securing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mid-clamps are used to secure solar panels to rails, then multiple panels can be secured simultaneously, but the clamps are exposed on top of the panels making them aesthetically unsightly
Solution Approach 1:
The clamp is inverted so that the gripping surfaces face upward to contact the panel flange, rather than facing downward as in conventional clamps. This allows the clamp body to be positioned below the panel, hiding it from view while maintaining securing functionality. The U-shaped configuration with upward-facing gripping surfaces enables this inverted arrangement.
Solution Approach 2:
The clamp transitions from a linear arrangement to a U-shaped configuration, adding a dimensional aspect by curving around the panel flange. This U-shape allows the clamp to engage the flange from below while positioning the securing mechanism in a different spatial orientation, achieving both aesthetic hiding and functional securing.
2Reliability
If conventional clamps with slots or guides on top of rails are used, then solar panels can be secured to the rails, but special tools are required for installation
Solution Approach 1:
The clamp incorporates self-aligning features including the U-shaped configuration that naturally orients itself within the rail slot, and gripping surfaces that automatically engage with the panel flange grooves. The resilient rear end provides self-adjusting pressure distribution. These self-service features eliminate the need for alignment tools or adjustment tools during installation.
Solution Approach 2:
The gripping surfaces act as intermediaries between the clamp and the panel flange, featuring raised portions with barbs that engage the grooves in the flange. This intermediary mechanism enables tool-free attachment by providing positive mechanical engagement without requiring threaded fasteners or adjustment tools.
3Strength
If existing clamps are used to secure solar panels, then mechanical fastening is achieved, but electrical grounding is not provided
Solution Approach 1:
The clamp is designed to perform multiple functions simultaneously: mechanical securing through the U-shaped gripping action, electrical grounding through the continuous conductive body, and structural support through the resilient rear end. This multi-functionality is achieved by making the entire clamp body conductive and configuring it to contact both the rail and panel flange, eliminating the need for separate grounding components.
4Reliability
If clamps are installed on the outer perimeter of solar panel arrays, then panels are secured, but the clamps are visible and reduce aesthetic appeal
Solution Approach 1:
The clamp is inverted and positioned below the panel flange, with gripping surfaces facing upward. This inversion allows the entire clamp body to be concealed beneath the panel on the perimeter, making it invisible from above while maintaining its securing function. The U-shape enables this concealed positioning.
Data Source
AI summary
In various representative aspects, an end clamp that mounts a bottom flange of a solar panel module to a rail support structure without requiring any tools for insertion while mechanically fastening and electrically bonding the solar panel module to the rail support structure. A method of installation is also provided.