To calculate the annual solar power production, the total installed capacity in kW is multiplied by the specific yield (in kWh/kW). The specific yield is determined based on a representative sample of plants from the Pronovo AG database, using actual production figures. Annual solar power production has steadily and significantly increased since 2010.
The following simplifying assumptions were made to estimate the number of households: 78% of people live in apartment buildings with an average household size of 2.18 people. A typical two-person household in an apartment building consumes an average of 2190 KWh/year.

Disclaimer:

The regional estimate of photovoltaic production is based on models and calculations. When aggregated at the national level, deviations from other statistics and figures published by the Swiss Federal Office of Energy (SFOE) may occur. The aim of this data product is to provide transparency on PV production and its potential at a regional and high temporal resolution. As with any model, there is an inherent margin of uncertainty, which may increase when data are aggregated.