Roof Vs façade Mounted PV systems 


Facade-Mounted PV Systems:

  1. Subject to Shading:
    • Description: Facade-mounted PV systems are more susceptible to shading, as adjacent buildings, structures, or landscaping elements can cast shadows on the solar panels.
    • Implications: Shading can significantly impact the performance of the PV system, reducing overall energy production.
  1. Lower Performance:
    • Description: Facade-mounted systems generally have lower performance compared to roof-mounted systems, primarily due to the increased likelihood of shading and suboptimal orientation.
    • Implications: Lower performance may limit the energy output and efficiency of the PV system.
  1. Clearly Visible, Showing Environmental Awareness:
    • Description: Facade-mounted PV systems are prominently visible on the building’s exterior, making a visual statement about the commitment to environmental sustainability.
    • Implications: The visibility of the solar panels contributes to raising awareness about renewable energy and environmental consciousness.
  1. Opportunities for Additional Use:
    • Description: Facade-mounted systems offer opportunities for additional use beyond electricity generation. They can serve as architectural elements, providing shade, aesthetics, or even acting as part of the building’s design features.
    • Implications: Integration into building design can enhance the multifunctional aspect of facade-mounted PV systems.

Roof-Mounted PV Systems:

  1. Less Likely to be Overshadowed:
    • Description: Roof-mounted PV systems are less likely to be overshadowed by adjacent structures or natural features, especially if the roof is unobstructed.
    • Implications: Reduced shading enhances the reliability and performance of the PV system, ensuring more consistent energy generation.
  1. Higher Performance:
    • Description: Roof-mounted systems generally achieve higher performance levels, as they are typically installed in locations with optimal sunlight exposure and less shading.
    • Implications: Higher performance results in increased energy production and improved overall efficiency of the PV system.
  1. Easier to Install:
    • Description: Roof-mounted installations are often easier and more straightforward to install, as they utilize existing roof structures without requiring additional support frameworks.
    • Implications: Simpler installation processes can reduce overall project costs and time.
  1. Less Vulnerable to Vandalism:
    • Description: Roof-mounted systems are less accessible and, therefore, less vulnerable to vandalism or intentional damage compared to facade-mounted systems.
    • Implications: Enhanced security can contribute to the long-term reliability and safety of the PV installation.
  1. Adds Weight to the Roof:
    • Description: The installation of roof-mounted PV systems adds weight to the roof structure.
    • Implications: Structural considerations are important to ensure that the roof can support the added load of the solar panels. Consultation with a structural engineer may be necessary.

In summary, the choice between roof-mounted and facade-mounted PV systems depends on factors such as shading, performance goals, visibility, ease of installation, vulnerability to vandalism, and structural considerations. Each option has its own set of advantages and considerations, and the decision should align with the specific requirements and constraints of the building and its surroundings.