Are There Special Design Requirements For Solar Installations In Snow?

Design Considerations for Snowy Regions

When designing a solar installation in a snowy area, it’s essential to consider the local snow load and how it will affect the system. The National Electric Code (NEC) requires that solar panels be designed to withstand a minimum of 30 psf (pounds per square foot) of snow load. However, this can vary depending on the location and local building codes. For example, areas with heavy snowfall, such as in the mountains, may require a higher snow load rating of 60 psf or more.

Panel Selection and Mounting

To ensure that solar panels can withstand snow loads, it’s crucial to select panels with a high snow load rating. Look for panels with a UL 1703 rating, which indicates that they meet the Underwriters Laboratories standard for wind and snow resistance. Additionally, consider using mounting systems that are specifically designed for snowy regions. These systems often feature a higher structural rating and may include features such as snow shedding brackets and reinforced frames.

Local Building Codes and Regulations

Before designing a solar installation in a snowy area, it’s essential to familiarize yourself with local building codes and regulations. These codes may dictate specific requirements for solar panel design, mounting, and system size. For example, some jurisdictions may require that solar panels be installed on a slope of at least 30 degrees to ensure that snow can shed easily. By understanding and complying with local regulations, you can ensure that your solar installation meets the necessary safety and performance standards.