ABSTRACT
The economic and technical development of photovoltaics is predominantly shaped on the global level, whereas the implementation and the spread strongly depend on local policies and actions. Comparing the potential of available and solar-architecturally suitable roof area between the urban environment of the City of Zurich and the fairly rural Canton of Fribourg, it can be stated that the potential of electrical energy production by photovoltaics to the electricity supply is three times higher in the rural area. Nevertheless, the City of Zurich has deployed its potential area much better. The relative contribution of photovoltaics to the electricity supply is fifty times higher in the City of Zurich than in the Canton of Fribourg. This fact emphasises the local aspects of photovoltaics implementation.
