BIPV (Building Integrated Photovoltaic) glass is a new type of green building material that integrates solar photovoltaic cells into glass. It fulfills four major functions simultaneously: building enclosure, daylighting, decoration and power generation, serving as a key material for achieving zero-carbon buildings and on-site power consumption.
• Essence: It is power-generating glass that directly replaces traditional glass for curtain walls, roofs and skylights, acting as an integral part of the building structure.
• Difference from BAPV: BAPV (Building Attached Photovoltaic) refers to adding photovoltaic panels to existing buildings, while BIPV means building material is photovoltaic — the building will lose its function if BIPV components are removed.
• Power Generation Principle: Based on the photovoltaic effect. Sunlight irradiates semiconductor cells → generates electric charges → forms direct current → converted to alternating current via an inverter → used by the building or fed into the grid.
Typical Structure
BIPV glass features a multi-layer composite structure, mainly including double/triple laminated glass and insulated glass units:
1. Outer Glass (Front Glass)
￮ Ultra-clear low-iron tempered glass (high transmittance) or TCO conductive coated glass (for CdTe thin-film technology).
￮ Thickness: 3.2mm–8mm, with high impact resistance and weatherability.
2. Photovoltaic Layer (Core Layer)
￮ Crystalline Silicon Type: Monocrystalline/polycrystalline silicon cells with adjustable spacing for light transmittance (10%–60%).
￮ Thin-Film Type: Cadmium telluride (CdTe) and CIGS thin films, featuring uniform power generation and better aesthetic appearance.
￮ Encapsulation: Laminated with EVA/POE films to protect cells.
3. Inner/Back Glass
￮ Tempered or semi-tempered glass for structural strength.
￮ Can be coated with Low-E, tinted or ceramic frit for improved thermal insulation and aesthetics.
4. Advanced Structure (Mainstream for Curtain Walls)
￮ Laminated Insulated BIPV: Outer power-generating laminated layer + air cavity + inner glass. Optimal performance in thermal insulation, sound insulation and safety.
￮ Vacuum BIPV: Ultra-high thermal insulation, suitable for ultra-low energy buildings.
Key Properties
1 Functionality
• Power Generation: Crystalline silicon efficiency ≈ 20%–24%, thin-film efficiency ≈ 12%–16%; on-site consumption with surplus power fed to the grid.
• Building Performance: Safety (tempered/laminated), thermal insulation, sound insulation, solar shading and privacy protection.
• Customizable Aesthetics: Adjustable light transmittance (0–60%), available in colored, gradient or stone-like finishes.
2 Economic & Environmental Benefits
• Space Saving: Uses building envelopes without extra land occupation.
• Long Service Life: 25–30 years, with efficiency degradation ≤20% over 25 years.
• Zero Carbon: No fuel consumption, emissions, noise or pollution.
• Peak Shaving: Power generation peak matches daytime electricity demand peak.
3 Safety
• Complies with national building glass standards: wind pressure resistance, impact resistance, fire resistance and anti-theft performance.
• Side wiring and hidden cable design for aesthetic and safe installation.
Main Applications
1 Photovoltaic Curtain Walls (Most Widely Used)
• Applicable to: Exterior facades of office buildings, hotels, airports, exhibition centers and other large public buildings.
• Advantages: Replaces traditional glass curtain walls, combining facade power generation, aesthetics and energy efficiency.
2 Photovoltaic Roofs & Skylights
• Applicable to: Factories, shopping malls, station canopies and atrium skylights.
• Advantages: Acts as a rooftop power station, providing thermal insulation and reducing air conditioning energy consumption.
3 Photovoltaic Shading Panels / Louvers / Skylights
• Applicable to: Building exterior shading, spandrels and roof windows.
• Advantages: Integrates shading, power generation and daylighting to improve indoor light and thermal environment.
4 Photovoltaic Tiles / Roofing Systems
• Applicable to: Residences, villas and sloped roofs.
• Advantages: Replaces traditional roof tiles, combining waterproofing, power generation and aesthetics.
5 Typical Cases
• Apple Park: 17MW rooftop BIPV system, meeting 75% of the building’s electricity demand.
• Landmark projects in China: Grand Canal Museum, World Laureates Forum Forum Site, Shandong University of Art & Design.
Summary
BIPV glass is a core material for green buildings, realizing the concept of “buildings as power plants”. Driven by carbon neutrality goals, it is rapidly becoming a standard configuration for new construction and renovation projects, with integrated advantages in economy, environmental protection, safety and aesthetics.
Qingdao Wider Materials Co.,Ltd
BIPV (Building Integrated Photovoltaic) glass is a new type of green building material that integrates solar photovoltaic cells into glass. It fulfills four major functions simultaneously: building enclosure, daylighting, decoration and power generation, serving as a key material for achieving zero-carbon buildings and on-site power consumption.
• Essence: It is power-generating glass that directly replaces traditional glass for curtain walls, roofs and skylights, acting as an integral part of the building structure.
• Difference from BAPV: BAPV (Building Attached Photovoltaic) refers to adding photovoltaic panels to existing buildings, while BIPV means building material is photovoltaic — the building will lose its function if BIPV components are removed.
• Power Generation Principle: Based on the photovoltaic effect. Sunlight irradiates semiconductor cells → generates electric charges → forms direct current → converted to alternating current via an inverter → used by the building or fed into the grid.
Typical Structure
BIPV glass features a multi-layer composite structure, mainly including double/triple laminated glass and insulated glass units:
1. Outer Glass (Front Glass)
￮ Ultra-clear low-iron tempered glass (high transmittance) or TCO conductive coated glass (for CdTe thin-film technology).
￮ Thickness: 3.2mm–8mm, with high impact resistance and weatherability.
2. Photovoltaic Layer (Core Layer)
￮ Crystalline Silicon Type: Monocrystalline/polycrystalline silicon cells with adjustable spacing for light transmittance (10%–60%).
￮ Thin-Film Type: Cadmium telluride (CdTe) and CIGS thin films, featuring uniform power generation and better aesthetic appearance.
￮ Encapsulation: Laminated with EVA/POE films to protect cells.
3. Inner/Back Glass
￮ Tempered or semi-tempered glass for structural strength.
￮ Can be coated with Low-E, tinted or ceramic frit for improved thermal insulation and aesthetics.
4. Advanced Structure (Mainstream for Curtain Walls)
￮ Laminated Insulated BIPV: Outer power-generating laminated layer + air cavity + inner glass. Optimal performance in thermal insulation, sound insulation and safety.
￮ Vacuum BIPV: Ultra-high thermal insulation, suitable for ultra-low energy buildings.
Key Properties
1 Functionality
• Power Generation: Crystalline silicon efficiency ≈ 20%–24%, thin-film efficiency ≈ 12%–16%; on-site consumption with surplus power fed to the grid.
• Building Performance: Safety (tempered/laminated), thermal insulation, sound insulation, solar shading and privacy protection.
• Customizable Aesthetics: Adjustable light transmittance (0–60%), available in colored, gradient or stone-like finishes.
2 Economic & Environmental Benefits
• Space Saving: Uses building envelopes without extra land occupation.
• Long Service Life: 25–30 years, with efficiency degradation ≤20% over 25 years.
• Zero Carbon: No fuel consumption, emissions, noise or pollution.
• Peak Shaving: Power generation peak matches daytime electricity demand peak.
3 Safety
• Complies with national building glass standards: wind pressure resistance, impact resistance, fire resistance and anti-theft performance.
• Side wiring and hidden cable design for aesthetic and safe installation.
Main Applications
1 Photovoltaic Curtain Walls (Most Widely Used)
• Applicable to: Exterior facades of office buildings, hotels, airports, exhibition centers and other large public buildings.
• Advantages: Replaces traditional glass curtain walls, combining facade power generation, aesthetics and energy efficiency.
2 Photovoltaic Roofs & Skylights
• Applicable to: Factories, shopping malls, station canopies and atrium skylights.
• Advantages: Acts as a rooftop power station, providing thermal insulation and reducing air conditioning energy consumption.
3 Photovoltaic Shading Panels / Louvers / Skylights
• Applicable to: Building exterior shading, spandrels and roof windows.
• Advantages: Integrates shading, power generation and daylighting to improve indoor light and thermal environment.
4 Photovoltaic Tiles / Roofing Systems
• Applicable to: Residences, villas and sloped roofs.
• Advantages: Replaces traditional roof tiles, combining waterproofing, power generation and aesthetics.
5 Typical Cases
• Apple Park: 17MW rooftop BIPV system, meeting 75% of the building’s electricity demand.
• Landmark projects in China: Grand Canal Museum, World Laureates Forum Forum Site, Shandong University of Art & Design.
Summary
BIPV glass is a core material for green buildings, realizing the concept of “buildings as power plants”. Driven by carbon neutrality goals, it is rapidly becoming a standard configuration for new construction and renovation projects, with integrated advantages in economy, environmental protection, safety and aesthetics.
Qingdao Wider Materials Co.,Ltd
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