Solar panels are typically installed with a gap or space around their edges, known as the “frame clearance” or “edge spacing.” This practice is important for several reasons.

1. Thermal Expansion and Contraction: Solar panels are exposed to temperature variations throughout the day and across seasons. The materials in a solar panel, such as the glass, frame, and solar cells, expand and contract with temperature changes. Leaving edges or frame clearance allows room for these materials to expand and contract without causing undue stress on the panel’s components. If the panel were tightly secured, temperature-related expansion could lead to mechanical stress and potential damage.
2. Water Drainage: The gap around the edges of a solar panel provides a path for water to drain and helps prevent the accumulation of moisture or debris that could damage the panel or compromise its performance. Effective drainage helps maintain the longevity and efficiency of the solar panel.
3. Preventing Frame Damage: Solar panels typically have aluminum frames that provide structural support and protection. Leaving clearance around the edges prevents direct contact between the frame and mounting hardware, reducing the risk of frame damage and potential electrical issues.
4. Allowing for Tolerance: Solar panels come in various sizes, and precise measurements can vary slightly. By leaving frame clearance or space around the edges, installers can account for these tolerances and ensure a secure and safe installation.
5. Aesthetic Considerations: Proper edge spacing can also contribute to a more visually appealing installation. It allows for a uniform and symmetric appearance that is often preferred in solar array installations.

In addition to the clearance around the edges, proper spacing and mounting techniques are essential to ensure that the solar panels are securely attached to their mounting structure. This helps prevent damage from high winds, snow loads, and other environmental factors.

The specific requirements for edge spacing may vary based on the manufacturer’s recommendations and local building codes or installation guidelines. Installers should follow the manufacturer’s instructions and any relevant local regulations to ensure the safe and efficient installation of solar panels. Proper installation and maintenance help maximize the performance and longevity of the solar array while reducing the risk of damage or malfunction.