Solar Roof Shingle With Integrated Nano-Inverter Venting
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Solution Overview
Problem
Traditional solar energy systems face challenges with large, aesthetically unpleasing AC solar panels that require significant ventilation and are difficult to install on steep roofs, due to high heat generation and safety hazards from live electrical connections during installation.
Innovation Solution
Development of a low-profile solar roof shingle system with a nano-inverter integrated within the shingle frame, converting DC energy to AC energy, allowing for direct roof mounting and reduced size to match traditional shingles, with ventilation solutions to manage heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional large AC solar panels are used, then power generation capacity is achieved, but aesthetic appearance deteriorates and installation difficulty increases
Solution Approach 1:
The patent divides the traditional large solar panel into multiple small solar collectors (e.g., 10x10 grid of individual cells), each with its own micro-inverter. This segmentation allows the system to maintain total power generation capacity while reducing individual component size for easier installation and better aesthetic integration with traditional roofing materials.
Solution Approach 2:
The patent transitions from large planar panels to three-dimensional shingle-like structures that can be layered and overlapped like traditional roof shingles. This dimensional transformation enables integration with existing roof architectures, improving aesthetic appearance while maintaining installation simplicity through standardized overlapping patterns.
2Reliability
If micro-inverters are integrated into solar collectors, then safety during installation improves, but heat generation increases
Solution Approach 1:
By distributing multiple small micro-inverters across the solar collector array rather than using one large inverter, the patent reduces the power handling and heat generation of each individual inverter. This segmentation allows for more effective heat dissipation from each component while maintaining the safety benefits of DC-to-AC conversion at the collector level.
Solution Approach 2:
The patent implements localized heat management by providing individual ventilation pathways and thermal management structures for each micro-inverter module. This allows heat to be dissipated at the source near each inverter rather than requiring centralized cooling, effectively managing temperature while preserving the safety advantages of distributed inversion.
3Temperature
If solar collectors are raised above roof deck for ventilation, then heat dissipation improves, but aesthetic appearance deteriorates
Solution Approach 1:
The patent designs solar collectors with a shingle-like profile that includes a lower profile section for aesthetic integration with the roof surface and an upper section that provides the necessary ventilation space. This vertical dimensioning allows heat dissipation pathways to be incorporated within the shingle structure itself, eliminating the need to raise collectors above the roof deck while maintaining both aesthetics and thermal management.
4Device complexity
If traditional DC arrays with central inverter are used, then system complexity is reduced, but installation safety deteriorates
Solution Approach 1:
The patent segments the inversion function from the central inverter architecture to distributed micro-inverters integrated with each solar collector. While this increases component count, it eliminates the need for complex series/parallel wiring calculations and reduces safety hazards by converting DC to AC at each collector, preventing live DC connections during installation. The modular nature simplifies installation procedures despite the distributed architecture.
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 system provides an aesthetically pleasing, safe, and efficient means to generate AC energy with reduced installation complexity and increased power capacity per roof area, while minimizing heat and ventilation requirements.
Implementation Method 1
The solar collector converts incident sunlight to DC electrical energy available at DC terminals
Implementation Method 2
A nano-inverter is positioned within the shingle frame between the bottom panel and the top panel with its input coupled to the DC terminals of the solar collector. The nano-inverter converts DC electrical energy to AC electrical energy
Data Source
AI summary
A solar roof shingle for providing AC electrical power when exposed to sunlight includes a shingle frame having a bottom panel supportable on a roof deck, a top panel, and a thickness between the bottom panel and the top panel. The solar roof shingle also includes a solar collector mounted to and covering at least a portion to the top panel of the shingle frame, with the solar panel producing DC electrical energy at DC terminals when the solar collector is exposed to sunlight. A nano-inverter is disposed within the shingle frame between the bottom panel and the top panel and is electrically coupled to the DC terminals. The nano-inverter converts DC electrical energy to AC electrical energy available at AC terminals mounted to the shingle frame.