Modular String Inverter Wiring for Photovoltaic Array Compatibility
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Solution Overview
Problem
Existing string inverters are incompatible with different photovoltaic arrays, leading to high product costs and complexity due to the need for multiple types of inverters.
Innovation Solution
A modular string inverter design featuring detachable wiring modules that can be assembled to an inverter main unit, allowing for flexible adjustment of input types and positions, enabling compatibility with various photovoltaic arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of string inverters are used to accommodate different photovoltaic arrays, then compatibility with various photovoltaic arrays is improved, but device complexity and product costs increase
Solution Approach 1:
The inverter is divided into a main unit and detachable wiring modules. The wiring modules can be independently selected and assembled based on different photovoltaic array requirements, allowing compatibility with various array types without needing multiple complete inverter models. This segmentation enables flexible configuration while maintaining a single base platform.
Solution Approach 2:
The main unit is designed with universal compatibility to work with different types of wiring modules. The standardized interface and modular architecture allow one main unit to serve multiple functions by accepting various wiring module configurations, thereby accommodating different photovoltaic array types without requiring multiple specialized inverters.
2Adaptability or versatility
If multiple types of string inverters are used to accommodate different photovoltaic arrays, then compatibility with various photovoltaic arrays is improved, but product costs increase
Solution Approach 1:
By segmenting the inverter into standardized modules, manufacturing can be optimized through economies of scale. The main unit and wiring modules can be produced independently using standardized processes, reducing per-unit costs compared to manufacturing multiple complete inverter models. This modular approach allows for more efficient production and inventory management.
Solution Approach 2:
A single main unit design serves multiple purposes by compatible with different wiring modules, reducing the need to manufacture multiple specialized units. This universality decreases manufacturing complexity and inventory requirements, thereby lowering overall product costs while maintaining compatibility with various photovoltaic arrays.
3Ease of operation
If the wiring module is detached from the inverter main unit during installation, then ease of installation and adjustment is improved, but device complexity increases
Solution Approach 1:
The detachable wiring module design allows installers to connect components in a logical sequence - first connecting the DC input cable to the wiring module, then assembling the wiring module to the main unit. This segmentation simplifies the installation process by breaking it into manageable steps while the standardized interfaces minimize the complexity of the modular assembly.
Solution Approach 2:
The wiring module can be pre-connected to the DC input cable before being assembled to the main unit. This preliminary action allows cable connections to be made in a convenient location without being constrained by the main unit's installation position, thereby easing installation while the standardized docking interface keeps the overall system complexity manageable.
Data Source
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AI summary
A string inverter, comprising an inverter main body and multiple wiring modules. The wiring modules are detachably assembled to the inverter main body, the wiring modules each have an input end, and at least some of the wiring modules have different types of input ends. In the solution, the wiring modules are independent of each other, so that during product assembly, the wiring modules having particular types of input ends can be matched according to requirements, and then the type of the string inverter can be adjusted so as to adapt to different photovoltaic arrays for use, thereby improving the compatibility of the string inverter.