BIPV Frequently Asked Questions: Light pollution, heat transfer coefficient, power generation estimation, transmittance selection, price of power generation glass, installed power per square meter...

With the continuous deepening of the "dual carbon" goals and the strong promotion of green building policies, the BIPV (Building Integrated Photovoltaics) industry has entered a stage of rapid development in recent years. However, given that the BIPV industry spans multiple professional fields such as photovoltaic electricity, architectural design and structure, and fire protection, its technical complexity and interdisciplinary characteristics have led to a lack of comprehensive and in-depth understanding of the industry by the public. To help all sectors better understand the BIPV industry, this account has systematically compiled and summarized the previously pushed frequently asked questions and answers about BIPV, and shares them here for your reference.

1. Among many BIPV materials, cadmium telluride solar glass stands out among many photovoltaic building materials due to its high power generation capacity, excellent safety performance, and high degree of customization. However, whether it will cause light pollution has always been a focus of attention in the industry.

Click to view: Measured data: Will the power generation glass used in BIPV projects produce light pollution?

2. Many architectural designers are concerned that the heat transfer coefficient (K value) of photovoltaic glass is too high, which will affect the building's heat insulation performance?

Click to view: In-depth analysis of the heat transfer coefficient of cadmium telluride solar glass

3. As an important part of BIPV technology, photovoltaic curtain walls not only have aesthetic value but can also effectively achieve solar power generation and reduce building energy consumption. The construction technology key points of photovoltaic curtain walls include form selection, grid design, tilt angle optimization, shadow blocking, power generation calculation, and structural design.

Click to view: Analysis of key technical points for photovoltaic curtain wall construction

4. Compared with traditional rooftop photovoltaic power stations, the power generation estimation of BIPV projects is more complex, involving multiple factors such as installation methods, azimuth angles, component types, transmittance, and shading conditions. Taking Hangzhou as an example, combined with three typical BIPV application scenarios—photovoltaic curtain walls, photovoltaic skylights, and photovoltaic tiles—this article briefly analyzes the power generation estimation method to provide practical reference for professionals in the construction and photovoltaic industries.

Click to view: Say goodbye to "guesswork"! How to estimate the power generation of BIPV projects?

5. Choosing the right solar glass is crucial for the performance and aesthetics of photovoltaic sunrooms. Solar glass products, with their unique characteristics and advantages, provide diversified choices for the construction of photovoltaic sunrooms.

Click to view: How to choose four types of solar glass products used in photovoltaic sunrooms?

6. In the process of rapid development of the photovoltaic industry, in addition to the attention paid to crystalline silicon batteries, cadmium telluride photovoltaics have also attracted industry attention in recent years.

Click to view: Understanding Cadmium Telluride Solar Glass (with FAQs)

7. The most common applications in photoelectric building scenarios are photovoltaic skylights on the roof and photovoltaic curtain walls on the facade. While possessing the functional attributes of traditional building materials, photovoltaic building materials also need to meet the building's lighting requirements, and the requirements for light transmittance of photovoltaic skylights and photovoltaic curtain walls are different.

Click to view: How to choose the light transmittance of photovoltaic glass?

8. Why is the price of cadmium telluride solar glass not as transparent as that of crystalline silicon components? The price per watt (per square meter) does not seem to be fixed but rather a relatively vague range.

Click to view: Why is the price of solar glass not transparent?

9. How many watts of power per square meter does solar glass with different light transmittance have? Taking the photovoltaic products of Longyan Energy, a representative domestic cadmium telluride component manufacturer, as a reference, this article reveals this secret.

Click to view: The Secret of Photovoltaic Buildings: Unveiling the Power of Solar Glass with Different Light Transmittance

10. Are those beautiful-looking photovoltaic tiles really cost-effective? Is their economic viability sufficient to support a new market?

Click to view: Are Photovoltaic Tiles a "Money-Making Machine" or a "High-Cost Toy"? Let's do the math!

11. As the "face" of a building, the value of a factory facade is far more than just power generation. It carries multiple attributes, including architectural aesthetics, corporate image display, and functional needs. Simply comparing the cost and benefits of facade photovoltaic curtain walls with rooftop power stations in an "apples-to-apples" manner ignores the decorative function of the facade itself and its added value.

Click to view: Factory Facade Photovoltaic Curtain Walls: A New Development Approach from "Cost Game" to "Value Reshaping"

12. What are the specific differences between conventional photovoltaics and BIPV (Building Integrated Photovoltaics)? This article analyzes the differences from multiple dimensions, including market and logic, and combines the technology, economics, application scenarios, and future trends of both.