Frameless PV Module Mounting for Wind Load Distribution
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Solution Overview
Problem
Existing solar panel mounting systems face challenges in supporting frameless solar panels efficiently, particularly in distributing wind-induced loads and accommodating various roof types, while maintaining energy efficiency and reducing installation complexity and costs.
Innovation Solution
A solar array mounting system featuring flexible pedestal-style feet, rigid links, and panel clamps with EPDM rubber gaskets, which securely attach frameless solar panels at a tilt, distributing uplift forces and resisting wind pressures through a compliant mounting structure that adapts to different roof surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solar panels are mounted in a tilted configuration to maximize solar capture, then energy efficiency is improved, but wind-induced lift and drag forces increase
Solution Approach 1:
The mounting system divides the solar array into modular units with individual panels or groups of panels mounted on separate racking structures. Each module can be independently secured to the roof, allowing the tilted configuration for energy efficiency while distributing wind loads across multiple discrete attachment points rather than creating a large continuous surface area.
Solution Approach 2:
The system uses ballast weights or mechanically anchored structures that provide counteracting forces to resist wind-induced lift and drag on tilted panels. The ballast or anchoring mechanisms are positioned to balance the aerodynamic forces generated by the tilted panel configuration, allowing the panels to maintain their energy-optimizing angle while withstanding wind loads.
2Force
If mounting structures provide greater weight or ballast to resist wind forces, then resistance to wind forces is improved, but the load on the building increases
Solution Approach 1:
The mounting system introduces intermediary structural elements such as roof penetrations, flange mounts, or distributed ballast systems that transfer wind loads directly to the building structure or ground in a controlled manner. These intermediaries allow the tilted panels to resist wind forces through mechanically fastened connections or strategically placed ballast rather than requiring excessive overall system weight, distributing loads to points where the building structure can accommodate them.
Data Source
AI summary
A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.