Mounting rails are what hold and support your solar panels. Solar panel mounting rails come in different thicknesses and lengths. Thicker rails are stronger and can support more weight and distance between roof attachments (known as “spans”).
For brackets rated between 20W and 80W, align the short edge of the solar panel to the top edge of the bracket (Figure 3). For solar panels rated between 100W and 150W, align the long edge of the solar panel to the top edge of the bracket (Figure 3). This is the standard mounting position for solar panels.
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