Quick Answer
Solar panels for snow and sun are designed to withstand different environmental conditions, with snow-load panels having a higher weight capacity and sun-load panels prioritizing efficiency.
Designing for Snow
Snow-load solar panels are engineered to handle the weight of heavy snow accumulation, typically exceeding 50 pounds per square foot. This is achieved through reinforced frames, increased mounting system strength, and often a more robust panel design. Manufacturers such as SolarWorld and Trina Solar offer specific snow-load certified panels, rated for areas with heavy snowfall.
Key Differences in Panel Selection
When choosing between solar panels for snow and sun, consider the location’s climate and average snowfall. For example, areas with high snowfall like the Northeast US or the Rocky Mountains, may require snow-load certified panels, while sun-drenched regions like California or Hawaii prioritize high-efficiency panels. Consider the following factors: panel efficiency (watts per square foot), frame material, and certifications (e.g., UL 3100 for snow-load). For example, the SolarEdge HD-Wave inverter is designed to support both snow-load and high-efficiency panels.
Installation Considerations
When installing solar panels in snowy regions, ensure proper roof preparation, including ensuring the roof can support the additional weight of snow and panels, and consider using snow-rails or other mounting systems designed for heavy snow conditions. Additionally, consider the installation location’s exposure to wind and the potential for snow drifts. In areas with heavy snowfall, it’s also important to clean the panels regularly to maintain energy production.
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