Solar Lead Assembly With Integrated Fusing for Combiner-Box-Free Wiring
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Solution Overview
Problem
Conventional solar power installations require a combiner box, which is cumbersome, prone to damage, and necessitates complex installation and maintenance, making it undesirable for efficient and cost-effective operation.
Innovation Solution
A lead assembly comprising a drop line and feeder cable, undermolded and overmolded at the nexus, connects solar arrays directly to an inverter without the need for a combiner box, integrating in-line fuses for protection and using connectors for easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a combiner box is used to connect solar arrays to inverter, then electrical connections can be made, but the device becomes clumsy, prone to damage, and requires complex installation and maintenance
Solution Approach 1:
The patent extracts the combiner box from the system and replaces it with a direct connection between solar arrays and inverter using a lead assembly with integrated connectors. This eliminates the intermediate component that caused complexity and reliability issues, while maintaining all necessary electrical connection functions.
Solution Approach 2:
The patent merges the functions of the combiner box into the lead assembly by integrating connectors and wiring directly into the connection between solar arrays and inverter. This consolidation eliminates the separate combiner box component, reducing system complexity and potential failure points.
2Productivity
If a combiner box is used to combine energy from solar arrays, then power can be delivered to inverter, but the installation requires extensive planning and skill
Solution Approach 1:
The lead assembly is pre-configured with integrated connectors and wiring before installation. This preliminary preparation eliminates the need for complex on-site planning and connection work, allowing installers to simply connect the pre-assembled unit between solar arrays and inverter.
Solution Approach 2:
The patent segments the connection system into modular components (solar array connectors, lead assembly, inverter connectors) that can be independently installed and configured. This modular approach simplifies installation by allowing step-by-step assembly without requiring complete system planning upfront.
3Reliability
If a combiner box is used in solar installation, then electrical connections are established, but the box must be periodically maintained and is difficult to move
Solution Approach 1:
The patent removes the combiner box from the system, eliminating the component that required periodic maintenance. The direct lead assembly connection has fewer moving parts and connection points, reducing maintenance requirements while maintaining system reliability.
Solution Approach 2:
The design discards the traditional combiner box approach in favor of a simpler direct connection system. By eliminating the intermediate component, the system reduces maintenance burden while recovering the essential function of electrical connection through the integrated lead assembly.
Data Source
AI summary
A lead assembly includes a feeder cable, a drop line cable with first and second drop lines, and one or more mold structures disposed about and enclosing a region of electrical interconnection between the feeder cable and the drop line cable. The first drop line terminates at a first drop line connector configured for detachable connection to a wire harness having multiple branches that are each configured to receive electrical power generated by a corresponding PV panel. The second drop line terminates at a second drop line connector. The mold structure(s) are disposed about and enclose a region of electrical interconnection between the feeder cable and the drop line cable. In the region of electrical interconnection, at least a portion of the drop line cable extends along a longitudinal axis that is parallel to a longitudinal axis of at least a portion of the feeder cable.