Photovoltaics continues to be an important factor in the energy transition and increases the value of a building. The technologies for producing and storing renewable energies are available and are constantly evolving. However, their large-scale implementation has not yet been convincing. The aim is to bring business, politics, and the public under one (solar) roof.
In Germany, more and more companies and private households are turning to solar energy. According to the Federal Statistical Office, in March 2025, there were around 4.2 million photovoltaic systems installed on roofs and properties in Germany, with a total output of around 98,300 megawatts. This represents an increase of 23.7 percent in the number of systems compared to the same month last year, with installed capacity rising by 21.9 percent. In March 2024, there were around 3.4 million photovoltaic systems with a total output of around 80,700 megawatts. All photovoltaic systems that feed into the public grid are included in the statistics.
The share of photovoltaics in total electricity generation continues to increase. In 2024, around 59.5 million megawatt hours of electricity were fed into the grid through the operation of photovoltaic systems. This means that photovoltaics accounted for 13.8 percent of total domestic electricity production, which is a new record high. In 2023, photovoltaics accounted for 12.0 percent of total electricity feed-in. The previous record month for solar power in Germany was July 2024: with just under 8.7 million megawatt hours, more than a quarter (27.4 percent) of the electricity fed into the grid was generated by photovoltaic systems.
Since the fourth quarter of 2023, the SPINX has been indexing price developments for the installation of photovoltaic systems without battery storage. The data is based on offers from regional and national solar companies. The current data shows large regional differences in price developments and varying trends depending on the period under review. "After the boom, installation costs have fallen significantly, while electricity costs remain at a level of over 40 cents per kilowatt hour. Investing in alternative energy supplies is worth considering," says Christoph Barniske from the solar system comparison platform Selfmade Energy.
Graphic: © Destatis, 2025
