Technical Insights – How BIPV Systems Work in Real Projects

What if a building’s facade, roof, railing or shading system could do more than serve an architectural purpose? With building-integrated photovoltaics (BIPV), these elements can also generate solar electricity as part of the building itself. Unlike PV systems simply added to an existing surface, BIPV is considered part of the building’s design and construction. This brings architectural, structural, electrical, and safety requirements into the same design process. From choosing suitable building elements and assessing solar exposure to connecting the system and planning for maintenance, every stage matters. In this blog, we will understand how BIPV systems work in real building projects.

What Types of Projects Can Use BIPV, and Where Can It Be Integrated?

BIPV can be used across building types where suitable surfaces or architectural elements can integrate PV systems without compromising their intended function. The choice depends on available area, solar exposure, building design and technical requirements. 

Building and project types

• Residential buildings: High-rise apartments, villas and residential developments can incorporate BIPV into facades, roofs, balconies and canopies.
• Commercial buildings: Offices, hotels, retail spaces and mixed-use developments can use suitable facades, roofs and external architectural elements for solar generation.
• Institutional buildings: Schools, universities, hospitals and public buildings can integrate PV into parts of the building envelope or external structures.
• Industrial and infrastructure projects: Warehouses, manufacturing facilities and suitable transport-related structures can incorporate BIPV where the building design and site conditions support it.

Large commercial and infrastructure projects such as malls and airports can also integrate solar into suitable building elements. Explore our guide to solar integration in airports and malls for more on these applications.

Common BIPV applications

• Facades and cladding: BIPV cladding panels can form part of the external building envelope while generating solar electricity.
• Roofs and solar rooftiles: PV can be integrated into roofing systems while maintaining their intended function. Solar rooftiles incorporate PV technology directly into the roof surface.
• Balcony railings: Solar modules can form part of balcony or balustrade systems where appropriate.
• Fins and louvers: PV elements can combine solar shading with electricity generation.
• Canopies: Solar-integrated canopies can provide shelter while using the available surface for generation.

What Needs to Be Considered Before Designing a BIPV System?

BIPV design starts with understanding the building, site and intended application. Unlike conventional PV installation, designing with BIPV requires the photovoltaic system to be considered alongside the building’s architectural, structural, electrical and safety requirements.

Building & structural requirements

• Available area: Assess the dimensions, geometry and usable surfaces available for integration.
• Mounting and fixing: Select an appropriate method to connect the BIPV element to the building structure.
• Structural loads: Consider wind loads and other applicable loads, along with the interfaces between the BIPV system and building structure.
• Weather protection: For roofs and facades, waterproofing, drainage and related envelope details need to be resolved as part of the design.

Solar and site considerations

• Orientation and inclination: Assess how the position of each integrated element will affect solar exposure.
• Shading: Identify potential shading from nearby buildings, architectural features and other obstructions.
• Energy yield: Estimate expected generation based on site conditions, system configuration and available solar resource.
• Module configuration: Select module characteristics and electrical configuration appropriate to the application and building geometry.

Safety & compliance

• Fire performance: Consider applicable fire safety requirements for the building and BIPV application.
• Electrical safety: Address wiring, grounding, protection and other electrical requirements.
• Applicable standards: Identify relevant building, electrical and PV product standards during design.
• Application-specific requirements: Requirements can vary depending on whether the BIPV element functions as roofing, facade, railing, shading or another building component.

How Does a BIPV System Work Once It Is Integrated Into the Building?

Once designed, a BIPV system combines the functions of a building element with those of a photovoltaic system. The exact configuration varies by application, but the basic process connects the architectural element to the building structure and electrical network.

• Building element: PV modules are incorporated into a facade, roof, railing, canopy, louver or another architectural element. The element continues to perform its intended building function while also generating electricity.
• Structural integration: The BIPV element is supported and fixed to the building through an appropriate structural interface. The fixing arrangement needs to account for the relevant loads and site conditions.
• Energy generation: When sunlight reaches the PV modules, the photovoltaic cells generate DC electricity. This electricity is collected through the system’s electrical connections.
• Electrical connection: The DC output is connected to an appropriate inverter and electrical system. Depending on the project design, generated electricity can be used by building loads, with surplus energy potentially exported to the grid.
• Monitoring: Monitoring systems can track energy generation and system performance, helping identify unusual changes that may require investigation or maintenance.

How Do Orientation, Shading and System Design Affect Performance?

BIPV systems often use surfaces with different orientations and inclinations, so their energy generation may vary across the building. Performance needs to be considered as part of the overall design rather than assuming that every integrated surface will produce the same output.

• Orientation: The direction a facade, roof or other BIPV element faces affects the amount and timing of solar radiation it receives.
• Inclination: The angle of the integrated surface can influence solar exposure and expected energy generation.
• Shading: Balconies, overhangs, neighbouring buildings and other architectural features can reduce sunlight reaching parts of the PV system.
• System configuration: Electrical design can be planned to account for different orientations, shading conditions and operating characteristics across the installation.
• Module-level solutions: Microinverters or other suitable power-electronics configurations may be considered where project conditions make module-level optimisation appropriate.

How Do Execution, Durability and Maintenance Affect BIPV Performance?

BIPV performance depends on effective coordination of building, electrical and installation requirements. Since BIPV elements can form part of the building envelope, key installation details should be resolved before work begins. 

Project coordination

• Multidisciplinary planning: Architectural, structural and electrical teams need to coordinate the BIPV system with the wider building design.
• Interface details: Fixing points, waterproofing, drainage, cable routes and maintenance access should be addressed before installation.
• Installation and commissioning: Correct installation, electrical connections, testing and commissioning help ensure the system operates as designed.

Durability and maintenance

• Material selection: Materials should be suitable for the building application and expected environmental exposure.
• Cleaning: Cleaning requirements can vary depending on the location, surface orientation, surrounding conditions and accessibility.
• Access: Facades, canopies and elevated installations require practical provisions for inspection and maintenance.
• Performance monitoring: Tracking system output over time can help identify unexpected performance changes and support timely investigation or maintenance.

A well-coordinated approach helps ensure that the BIPV system remains compatible with the building while continuing to generate electricity throughout its operating life.

Conclusion

BIPV is more than adding solar modules to a building. It integrates energy generation with architectural and structural elements, while also requiring careful electrical, safety and maintenance planning. From site assessment and system design to installation and long-term monitoring, each stage can influence performance and reliability. A successful BIPV project therefore requires coordination across the building’s design and energy systems. 

Aelius, a leading manufacturer of BIPV and turnkey solar solutions, works with project teams to develop building-integrated solar solutions based on their architectural, structural and energy requirements. Contact us to explore the right BIPV approach for your project. 

FAQs

1. How do BIPV systems work?

BIPV systems integrate photovoltaic modules into building elements such as facades, roofs, railings and canopies. The modules generate electricity from sunlight, which can then be used by the building or exported to the grid, depending on the system design.

2. Where are BIPV systems commonly installed?

BIPV systems can be integrated into facades, roofs, balconies, canopies, fins, louvers and other suitable building elements. They can be used across residential, commercial, institutional, industrial and infrastructure projects.

3. Is BIPV more expensive than conventional solar panels?

BIPV can have higher upfront costs because the PV system is integrated with a building element and requires customised design and installation. Costs vary depending on the application, materials, system size and project requirements.

4. What factors should be considered before installing a BIPV system?

Key factors include the available area, building structure, orientation, shading, energy requirements, electrical integration, fire safety and applicable standards. Installation, maintenance access and weather protection should also be considered where relevant.