Sheathing, pre-installed anchors for mounting solar panel modules, and method of installation

A panel comprising:

• a first end;
• a second end opposite the first end;
• a first side;
• a second side opposite the first side;
• and
• a plurality of pre-installed anchors in the panel,
• wherein a fastener is disposable within individual anchors of the plurality of pre-installed anchors to attach a bracket to the panel for supporting one or more solar panel modules, and
• wherein at least a portion of the plurality of pre-installed anchors are equidistantly spaced apart from one another (i) in a first direction between the first end and the second end, or (ii) in a second direction between the first side and the second side.

A method comprising:

• determining locations to install a plurality of anchors into a piece of sheathing;
• installing the plurality of anchors into the piece of sheathing at the locations, respectively;
• installing the piece of sheathing onto a structure;
• installing a roofing material onto the sheathing;
• determining a location of the locations of one or more anchors of the plurality of anchors beneath the roofing material;
• and
• attaching a bracket to the structure via fasteners secured into the one or more anchors.