Racking systems are the structures that mount solar panels in place. Racking systems must be designed properly to ensure that they can resist geotechnical failures, wind-loading failures, and structural failures. Ground-mount racking systems are installed on the ground, and are typically made of extruded aluminum. Ground mount systems are typically installed using helical piles, or ballasted foundations. Roof-mounted racking systems are installed on the roof of an existing building. Roof-mounts are more common and typically more cost effective; however, ground-mounts in northern locations can increase a system’s production by achieving a higher-sloped tilt to optimize the energy that can be harvested.