Open Source Racking for Solar Cell Modules

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Combine bolts, wire, and 3-D printable brackets to drastically reduce solar cell racking costs. Solar photovoltaic prices have plummeted so much that now the racking costs more than the solar panels for small systems. To fix this issue, we created a 3-D printable racking design that slashes costs by 80%. The X-wire racking system consists of corner brackets and crossing steel cables. Brackets are designed in OpenSCAD and can be customized to fit specific needs. A prototype X-wire rack was fabricated using a RepRap 3-D printer in PLA, as shown in images, and stabilized with a steel threaded rod. Brackets could combine the rod and bracket into a single component for added strength. For complete Bill of Materials (BOM) and details about the system and testing see here. For ground-mounted systems, visit this link. For roof-mounted systems, go here. To learn more about the project, check out Appropedia. All OpenSCAD files are available for download. Print Settings: Printer Brand: RepRap Printer Model: MOST delta Rafts: No Supports: No Resolution: 300 Infill: 100% Notes: For a complete BOM and details, refer to the papers linked above. Print at 100% infill for mechanical strength. If using PLA, it must be coated or painted to prevent breakdown.