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Based on responses received, a variety of product segments were identified as being pursued in the United States. The list includes:
In terms of markets served, most of the respondents indicated a focus on residential or commercial buildings. This was an almost equal split, with slightly more responses giving preference to commercial buildings and the majority pursuing both markets. It was noted by some respondents that their strategy is to initially target commercial buildings and then move to the residential market, as they see more difficulties for the residential segment due to less willingness of owners to pay and lack-of-standardization concerns for BIPV products. Some special segments of the commercial building market, like government buildings, educational facilities, hospitals, manufactured houses, and agricultural facilities were also identified by the respondents as being of interest and of their primary focus. The following segments were specifically mentioned:
In terms of new buildings or retrofits, the vast majority of respondents mentioned being involved in both sectors with few of them only focusing on new buildings.
A variety of information was provided with respect to the alignment of commercialized BIPV products and market segments. Some responses viewed the topic from the customer market segment perspective and others from the side of the BIPV product and application. It was also noted that, assuming availability of various BIPV products, the type of BIPV should be dictated by the aspect ratio of the building. Larger roof areas (like in warehouses) would naturally be a better fit for rooftop solar, while taller, skinnier buildings (like high-rise office or residential buildings) would be better fit for glazing or façade products.
Overall, most of the respondents considered the extended commercial building market to be best aligned with commercialized BIPV products. This market includes high-end commercial office and retail buildings (which have fewer cost constraints and can use the technology as marketing point), educational facilities, such as schools, colleges, and universities (which consider educational and research benefits of incorporating new technologies, especially in the science and technology sectors), hospitals, hospitality buildings, and warehouse facilities (which consider weight issues and reduced need for puncture of membrane roofs). New construction commercial projects seem to have the most potential.
The residential building market seems to be interested in the appeal of aesthetics of BIPV compared to tradition rooftop PV products. Development of more aesthetically pleasing products would be the best strategy for alignment with this market, though cost is also a significant factor. Multi-family homes and high-rise buildings seem to be the most promising segments. New constructions seem to be perceived as better aligned compared to retrofits.
In terms of products, roofing products are perceived to be best aligned with the market, both for commercial and residential applications. Power generating windows and other glass products are secondary, with more appeal on in commercial applications. However, responses indicate that most of the existing products need further development as they might not be fully aligned with the market needs. Another product category identified is shading elements, awnings, and in particular carports and parking shade covers.
Respondents also provided some insights about differences between the U.S. markets and markets in Europe or elsewhere in the world. It was noted that in the United States, residential and commercial roofs for new constructions align well with existing BIPV products in the space, but elsewhere in the world, many more commercial products are available for building façades for high-rise buildings, offices, government buildings, educational facilities, sports arenas, airports, and public areas. In Europe, there have been large commercial projects integrating BIPV glass as well as several small-scale commercial projects integrating BIPV walls and façades.
A variety of information was provided on the market opportunities for BIPV products. Like in the previous question, some responses viewed the topic from the customer market segment perspective and others from the side of the BIPV product and application.
Respondents perceived the largest market opportunities for BIPV to be in the commercial sector; however, residential applications were also considered to present great opportunities. In the commercial segment, corporate offices, retail buildings, storefronts, public buildings, government buildings, educational facilities, hospitals, and light industrial facilities were specifically identified as promising. Opportunities for older buildings with large power needs at places where the grid infrastructure is older were mentioned as well as applications that combine conventional rooftop solar with additional BIPV elements. For the residential sector, multi-family housing and low- and mid-rise buildings with a high ratio of wall-window to roof area were considered the largest opportunities. Incorporation of BIPV into manufactured housing and modular construction production lines was also identified as a promising opportunity. In terms of location, it was mentioned that the state of California would provide a large market opportunity because of the state requirements with respect to climate change and clean energy.
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When viewing opportunities from the BIPV product perspective, three product categories were identified as being the most promising in the market:
Regarding PV glass and power generating windows, respondents explicitly mentioned the stacking benefits of glass capturing infra-red light and thus also reducing heat transferred into the building.
Respondents also noted that a comprehensive market characterization and assessment is necessary, as the market opportunity will be eventually defined by the adoption and market-pull for these products, not by the theoretical availability of BIPV products that could replace a particular building element. Another view presented was the perspective of using the energy generated to offset the cost of the building element that is required by the building.
Respondents approached this topic from various different angles and provided different types of information related to marketing strategies, manufacturing locations, industry composition, and PV cell technologies mostly used by BIPV products. Some respondents noted that marketing efforts are very limited and are done on a project-per-project basis, and this is considered a contributing factor to the limited uptake of BIPV technologies.
In cases where developers or designers are more familiar with BIPV products, sourcing would follow the pattern of an interested architect or building developer reaching out to a BIPV product vendor. BIPV products are often marketed as elements of total-building approaches to achieve high LEED or similar scores. They are offered by the supplier to real-estate developers and architects with a promise of return on investment based on the electrical cost offset from the generated electricity as well as on applicable local incentives. Non-electrical benefits, such as acoustics, thermal, safety glazing, or UV light blocking, are also listed but often not included as part of the economic consideration. The dual-use and aesthetic aspects of BIPV compared to traditional PV products is another marketing point typically used.
There is a growing interest in U.S. manufacturing, as evidenced by the number of foreign-owned companies that have opened or are opening plants in the U.S., in addition to U.S.-owned companies that already have manufacturing facilities. The U.S. has established itself as a leader in the manufacturing of rooftop-integrated solar, but other companies could be incentivized to develop manufacturing capabilities that include PV integrated into windows, building façades, and other substrates. In addition, a growing number of innovative BIPV ideas have emerged across smaller companies and startups in the United States. Respondents, however, have noted that currently there are insufficient economic incentives for the development of domestic manufacturing of BIPV products and their respective supply chains in the United States. Tax incentives or grants to support BIPV manufacturers who wish to manufacture in the U.S. and for businesses to procure these products could be a driver for adoption.
In general, it is ideal to manufacture components as close to the market as possible as this reduces costs and speeds up development. The impact to the cost of the final product could be lowered, if the bulk of the raw materials and final assembly are completed domestically or regionally (especially if tariffs are considered). It is customary for the building industry to use local manufacturing and source materials locally, so it would be meaningful for BIPV to follow the same paradigm. Many building materials used in such products are large and heavy enough that makes sense to produce domestically and even regionally throughout the country to reduce transportation costs and logistics, which could account for 10-15% of the cost, in some cases. Other benefits include manufacturing to order, reduced inventories, on time delivery, quick deployment within the region, quality control, and the ability to better meet various sustainability requirements, while also ensuring supply chain security. It was also identified that cybersecurity of BIPV systems, as it pertains to their electronics and control hardware and software, provides another argument for domestic production.
The roofing industry lends itself to domestic manufacturing, with shipping costs being a major reason. The main challenge to the development of BIPV roofing is sourcing of materials and manufacturing of the non-industry standard-size solar roof tile. There currently exists very limited domestic capability for this need. The specific glass used in PV modules is made only in Asia today and is difficult and costly to source. Manufacturing equipment and facilities do not currently exist for specific solar tile sizes, and this not only increases cost but also lengthens development time. This creates needs and opportunities for developing domestic manufacturing capabilities.
Glass is also produced close to the consumption site due to high transportation costs because of the brittleness and weight of the product. Most windows are manufactured domestically, and insulated glass units (IGUs) follow this same pattern. IGUs are primarily ordered and manufactured regionally/domestically, due to custom specifications, sizes, and lead times. By extension, it is reasonable to conclude that solar windows and other glazing-based PV products are well-suited for domestic manufacturing. Solar windows are unlikely to be exported globally from a single manufacturing site as this could be cost prohibitive. If the integrated photovoltaic function does not involve fabricating semi-transparent solar cells over the entire window area, but rather only employ commercial solar cells (e.g. crystalline Si based) outside the window viewing area and thin-film coating techniques, then it is very feasible to integrate the photovoltaic window manufacturing/assembly alongside the existing window manufacturing facilities. It could also seamlessly integrate into the existing IGU supply chain (glass fabricators can apply PV coatings), which further ensures domestic manufacturing and that the revenue uplift from the value-added BIPV window product is captured domestically as well. Semitransparent OPV power generating windows also have a significant opportunity for domestic manufacturing.
Respondents also identified a few additional, more specialized opportunities for domestic manufacturing, such as cadmium telluride (CdTe) as the semiconductor for PV modules, pre-engineering and assembly of unitized curtainwall panels, manufactured homes incorporating BIPV, and emerging products that rely on advanced manufacturing like quantum dots.
Respondents described a variety of advantages that regional BIPV product manufacturing would provide. Such benefits pertain to:
It was also noted that this topic should be more thoroughly addressed within an economic framework that will consider factors like the costs of building and operating regional manufacturing facilities, the cost and availability of raw materials at a distributed scale, projected long-term product demand per region, the ability of a smaller manufacturing facility to adapt to new products and production equipment, and how the latter stacks up against projected savings in transportation and breakage costs.
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