System Setup: Is Ground Mounting Better Than Roof Mounting For Solar Panels?

Advantages of Ground Mounting

Ground mounting provides several benefits over roof mounting, particularly in regions with extreme weather conditions. In areas with high winds, such as the Midwest or coastal states, ground mounting reduces the risk of roof damage or panel dislodgment. A well-designed ground mounting system can withstand wind speeds of up to 140 mph, whereas roof mounting may not be as secure.

Considerations for Ground Mounting

When selecting a ground mounting system, consider the local solar irradiance levels, also known as sun hours per day. States with high sun hours, such as Arizona (7.1 hours/day) or Nevada (7.2 hours/day), can benefit from ground mounting to maximize energy production. Conversely, states with lower sun hours, like Washington (2.2 hours/day) or Oregon (2.5 hours/day), may require more efficient panels to compensate for reduced energy output.

Designing an Effective Ground Mounting System

To ensure optimal performance, design a ground mounting system that takes into account the site’s topography, soil conditions, and local building codes. A 3:12 slope is recommended for ground mounting, allowing water to run off and reducing snow accumulation. Use a 4-foot wide mounting rail to provide stability and support for the solar panels, and consider incorporating a tracking system to maximize energy production.