Solar photovoltaic costs have dropped so much that now the racking costs more than the solar panels for small systems. To fix that we made a 3-D printable racking design that slashes the costs 80%.

The X-wire racking system is made up of corner brackets and crossing steel cables . In any size X-wire system there are nine separate bracket configurations : (a) left back, (b) middle back, (c) right back, (d) left middle, (e) center, (f) right middle, (g) left front, (h) middle front, and (i) left front. The brackets are designed in OpenSCAD and can be customized. The prototype X-wire rack was fabricated using a RepRap 3-D printer in PLA (as shown in Figures) and stabilized using a steel threaded rod. brackets could couple the rod and bracket into a single component.

For the full BOM and details about the system and testing see for ground mounted systems for development: https://www.academia.edu/29779538/3-D_Printing_Solar_Photovoltaic_Racking_in_Developing_World and for roof mounted systems see: https://www.academia.edu/12442737/Total_U.S._cost_evaluation_of_low-weight_tension-based_photovoltaic_flat-roof_mounted_racking