Because they can be deposited on flexible surfaces and can offer better high-temperature performance, thin-film PV cells are used in some BIPV roofing products. However, this type of PV technology is about 50% less efficient per square foot than a traditional single- or multicrystalline PV technology. This lower efficiency results in about twice as much surface area needed to produce an equivalent amount of power. If your roof space is limited, consider products made from single- or multicrystalline PV cells.
