Glass to Power’s glass-glass photovoltaic (PV) glass allows architectural glazed surfaces to be transformed into active sources of renewable energy.
The power capacity of this type of glass is determined by the number of solar cells per unit, and typically offers a nominal power output ranging from 100 to 200 Wp/m2, varying according to the solar cell density required for the project.
Glass-glass PV modules ensure full architectural integration as they are specifically developed to replace building elements such as:
- Verandas and canopies
- Parapets
- Roofs
- Greenhouses
- Sections of curtain walls
The photovoltaic module can be integrated into an insulating glass unit (IGU) to improve the thermal and acoustic performance of the building.
Benefits of glass modules with photovoltaic cells for sustainable buildings
Key advantages
- High power output: Up to 180 Wp/m², ideal for sustainable buildings
- Full customization: Customizable dimensions, shape, transparency, and color
- Architectural versatility: Perfect integration into facades, roofs, parapets, and greenhouses
- Durability and safety: Tempered and laminated glass with high mechanical resistance
Technical structure of the Glass-Glass module with photovoltaic insulating glass unit
The core of the solution consists of strings of crystalline silicon photovoltaic cells encapsulated between two tempered and laminated glass panes with plastic interlayers. The cells, in addition to producing electrical energy, determine the module’s level of transparency, in relation to the chosen distance between them, thus allowing light to enter the building according to specific needs. Finding the right balance between natural light transmission and nominal power output is fundamental to achieving energy efficiency goals.
Custom design of glass for sustainable architecture
Glass-glass photovoltaic modules are custom-made and fully customizable in terms of size, shape, transparency, power output, thickness, cell type, and color. To optimize production in certain contexts, bifacial cells can also be used.
The cells can be spaced at varying distances, allowing for the adjustment of visible light transmission according to specific design needs.
Below are some examples of energy production per square meter, considering a variable number of cells, and the corresponding transparency percentage.
| N. cellls per sqm | Power output per sqm* | Transparency** |
|---|---|---|
| 12 | 65 W | 70% |
| 18 | 100 W | 55% |
| 24 | 130 W | 40% |
| 30 | 165 W | 24% |
| 36 | 200 W | 9% |
* Calculations refer to the use of photovoltaic cells with a 4 mm front glass. The use of different glass types results in variations in the production value.
** 100% transparency means completely transparent (equivalent to glass without cells). 0% transparency means completely opaque (equivalent to a traditional photovoltaic panel).
Certifications
Glass-glass photovoltaic modules are designed and manufactured in compliance with the most up-to-date reference standards related to both the building and photovoltaic sectors.
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