Mono-crystalline• PV-Modules belong to solar modules which are quite complex to be produced. Due to the high silicon content of the photovoltaic cells, these modules are very effective having an impact on the degree of efficiency and consequently produce a higher solar harvest. On this account mono-crystalline solar modules are very suitable for roof areas that only offer little space to install a PV-construction. PV-Modules have a durability of approximately 30 years. The typical recognition feature of mono-crystalline PVModules is the dark-blue/blackish coloring. In comparison to poly-crystalline PV-modules, mono-crystalline PVModules do have a higher degree of efficiency, however, they are mostly costlier and widely spread.

The recognition feature of poly-crystalline• PV-Modules is the bluish coloring und the crystalline structure. Poly-crystalline PV-Modules have a smaller degree of efficiency than for example mono-crystalline PV-Modules. This results from the fact that during production less pure resp. more impure silicon is used. Poly-crystalline PV-Modules also have a durability of approximately 30 years. These PV-Modules are especially suitable for larger roof areas, because in contrast to the majority of mono-crystalline PV-Modules, comparable space given, less output is produced.

Crystalline Thin Layer Solar Modules• consists of a approx. two micro meter thin layer of silicon. This aspect turns this form of solar modules to be very interesting. The crystalline silicon-thin-layer-solar-cells integrated in the solar module, also called „KSD“ (CST), are economically very interesting based on the fact that considerable less silicon is required while producing solar modules. The degree of efficiency of the crystalline thin-layermodules is considerable located below the mono- and poly-crystalline modules.