The world of architecture is undergoing a fundamental transformation. As countries continue to pursue aggressive “Net-Zero” energy building and carbon neutral goals, the role of building facades is dramatically changing. Gone are the days of the passive building façade serving only as a shield to protect us from the weather. Today’s building façades are being called upon to do a lot more. While architects have always looked to innovate and create more beautiful and functional designs, they have rarely considered the Façade to be more than just a non load bearing wall. At Glasvue (Agsitech) we have been at the forefront of architectural glass processing for 25 years, providing creative solutions for architects looking to create the most beautiful and high performance glass products.
Today, the most significant breakthrough in this evolution is Perovskite PV Glass—a next-generation thin-film photovoltaic technology that promises to turn every window into a silent, transparent power plant. But can these solar windows truly power a modern building? To understand the ROI and technical feasibility, here are five essential things you must know about Glasvue’s Perovskite technology.
1. Transparency vs. Power: Finding the Perfect Balance
One of the main challenges that traditional Building Integrated Photovoltaics (BIPV) have faced is the compromise between power generation and transparency. Crystalline silicon solar panels are not transparent, and this has caused many architects to have to choose between having a large, empty space as a result of a ceiling with an opaque structure, or to have no solar panels at all.
Perovskite solar cells make use of transparent glass for illumination, while absorbing the energy provided by the ultraviolet and infrared light. Glasvue uses a 6mm + 0.57mm + 6mm structure for its solar cells. This so-called “sandwich” structure is constructed from two layers of ultra-white tempered glass, sandwiching a flexible Perovskite PVB film in between.
Architects can now customize the transparency based on the building’s orientation:
Solar panel efficiency for office window integration 10-20% Shading Rate:
Recommended for office window applications where daylighting is desired. Power generation per day for a 1,000 m2 roof is approximately 200-300W.
40-60% Shading Rate:
More suitable for skylights or roof area that needs higher shading. These films are more dense and can produce light transmission up to 600-750W per day per 1000 square meters.
By adjusting the ratios of elements in our buildings, we can achieve a building that is both a light-filled sanctuary and an energy harvesting building that uses clean energy.
2. Efficiency Beyond the Lab: Why “Low Light” Performance Matters
While lab test results for Perovskite efficiency are looking up in record fashion, what really matters to solar applications developers is how the technology performs in the field. In contrast to the stability of silicon-based solar panels, which are known to suffer dips in power output the moment a cloud passes overhead or when they’re blocked by an adjacent skyscraper, Perovskite’s volatility has made it a wild card to depend on.
Perovskite PV Glass performs best in diffuse light and low light scenarios. Because the material is fabricated by thin-film deposition, it allows for energy harvesting from reflected sunlight off adjacent buildings, or ambient light on a rainy day.
The efficiency of the building facades in the Glasvue system can vary between 5-15% depending on the module configuration required for each building, including the level of transparency. This is lower than what is typically achieved on rooftops but as a building facade is typically five to ten times larger than a rooftop, the overall energy production of such a system is often much higher. And where a rooftop solar panel system may drop to half its maximum energy production in a “shadow zone” caused by other buildings, the Perovskite in the Glasvue glass maintains a steady power delivery to the smart storage of the building.
3. More Than Just Power: Superior Thermal and Acoustic Insulation
When it comes to high-performance architecture, energy generation is not about producing volts and amps, but about consuming kilowatts and Watts per square foot – in the smallest amount possible. A window that produces current can’t allow heat to escape. In this way, such a system is a failure to the underlying philosophy of sustainable design.
As a high performance building material first, Glasvue’s Perovskite PV Glass affords many benefits when replacing a standard single pane window with our PVB laminated structure. The structural integrity and thermal and acoustic performance of a building is therefore enhanced from the outset:
Because the K-value of our PV glass is 2.8 to 4.0 W/m²K (standard 6mm glass is generally higher than 5.0) this lowers the cooling/heating loads on the buildings systems by up to 10-25%: —- Thermal Insulation —-
Noise is a major source of nuisance in tower buildings. Our laminated structure has a Rw value between 35dB and 42dB, with a higher reduction of ambient noise compared to ordinary glass – 50-70%.
By integrating our solar glass, you are essentially installing a generator, an insulator and a sound barrier in a single architectural element.
4. Solving the Durability Myth: The 25-Year Promise
One of the major early discussion points around Perovskites was their supposedly high reactivity to water and oxygen. Glasvue Engineering has successfully bridged this wide gap between experimental research at the lab and the harsh conditions in a working-class production environment by leveraging state of the art technology, known as Industry 4.0, on site at our factory.
Our facility operates with an 85% automation rate, utilizing world-class equipment from Glaston (Finland) and Bystronic (Germany). Each sheet of Perovskite glass undergoes a rigorous high-end encapsulation process to ensure the PVB film is completely sealed from the environment.
We stand behind our durability with industry-leading warranties:
15-Year Appearance Warranty: Ensuring the glass remains clear and beautiful without discoloration.
25-Year Linear Power Output Warranty Offers complete assurance of stable energy production for decades.
That’s why Glasvue products are certified by regulatory bodies worldwide including US SGCC, Australian AS/NZS and European EN standards.
5. Real-World ROI: Turning Cost into Profit
Is the investment worth it? Let’s look at the data from Glasvue’s recent BIPV projects:
Recently, JUNFA SOLAR completed the Sanya Huaqiao-cheng residential PV system. After the on-site engineers completed the installation and power testing, the total power generated by 38.7 square meters of residential window glass is 11.61KW per day. When everyone goes to sleep, the PV system will provide pure solar power for the home’s lighting, refrigerators and air conditioners, fully realizing the concept of “living in the sun”.
With such large surfaces being available on most commercial buildings such as office blocks and shopping centres this system has enormous potential for revenue generation. For an average 1000m2 office building facade power generation can achieve anything up to 200-300KW per day. We have recently calculated that on a project we completed in Ningxia that the yearly power cost saving to the building owner will be 220,000 RMB or $31,000 USD.
Glasvue Perovskite Glass can help achieve the goal of reducing carbon footprint and has been quantified as follows. Glasvue Perovskite glass has the capability to cover an area of 1000 sqm. In one day, the amount of carbon emissions that can be reduced by this area is 997kg or 1 ton of CO2.
For developers, the glass ultimately pays for itself. What starts out as a capital expense in building construction, ends up as a material that not only helps to eliminate window maintenance, but in effect creates a new revenue-generating façade for the building.
Conclusion: The Future is Clear
Can a solar window power your building? The answer is Yes. With 25 years of glass manufacturing experience and by integrating leading edge Perovskite technology we are making Net-Zero buildings possible.
Whether you are creating a luxury residential development or a landmark tower for a whole city, Glasvue’s Perovskite PV Glass combines style, insulation and sustainable energy production in a single product, integrating all three elements in one glass panel.
Get modern with your next project. Browse our Product Page for the technical details or get in touch with our engineering team to plan a Green Power system that fits your needs.
FAQs
Q: Can the Perovskite PV Glass be made in different colors to match my building design?
A: Yes, unlike conventional blue/black silicon solar panels, our Perovskite film can be created in multiple base colors including blue, green and gray and can also be finished in more metallic colours like gold or silver grey.
Q: Can this be used in high rise buildings?
A: Yes it can. The PV glass is made up of Tempered safety glass that complies to SGCC/AS/NZS standards. If impact causes the glass to break, the shards stay attached to the inner PVB film, thereby eliminating shards of broken glass dropping on the ground below hence keeping all lives safe.
Q: How does the performance compare to “Low-E” energy-saving glass?
A: Our Perovskite PV glass integrates the well-known Low-E technology. While Low-E glass is simply designed to reflect heat to reduce energy consumption, our PV glass not only reflects heat but also generates electrical energy. Our PV glass provides an additional energy efficiency gain of 10-30% compared to Low-E systems.