There is a wide range of cells and modules in the market. There are various types of cell material, types of modules, framed or non-framed laminates, colors of the cells and colors of back sheets and frames; all provide a wide range of possible surfaces . This is a very basic knowledge for architects. Architects will design BIPV systems with a certain image in mind. Their choice of monocrystalline or polycrystalline (multicrystalline) cells will depend on color and not on efficiency .
18.104.22.168 Categories of integration
BIPV systems in projects can be divided according to the location of the application: roof systems, facade systems, glass construction (conservatory/atrium) systems and building components such as shading and canopy systems. The main mounting locations are the roof and the facade. There are
Figure 23.32 This shopping mall in Lausanne, Switzerland, includes a louver system with transparent modules mounted above the shop windows, which results in less reflection of sunlight in the windows, making it easier to look into the shops. Reproduced with permission by BEAR Architecten T. Reijenga
Figure 23.33 This zero-energy project in Etten-Leur, The Netherlands, combines different sustainable energy techniques. Each house has a roof structure with 6.2 kWp BP Solar PV modules. The aesthetic integration of the PV system is a completely new concept in housing. Reproduced from Reijenga T, Energy-Efficient And Zero-Energy Building in the Netherlands, Proc. International Workshop on Energy Efficiency in Buildings in China for the 21st Century, CBEEA (Beijing, December 2000) with permission by BEAR Architecten 
also many creative solutions available in designing how PV systems can be integrated. All these solutions are grouped as building components.