A PV system, short for photovoltaic system, is one of the most efficient methods of generating clean and renewable energy from the sun. It not only contributes to reducing CO₂ emissions but also enables an independent energy supply for homes and businesses.

How does a photovoltaic system work?

Photovoltaic systems use solar cells that convert sunlight into electricity. This process is based on the so-called photovoltaic effect, in which semiconductor materials such as silicon generate electricity when they are struck by light. The direct current (DC) generated is then converted into alternating current (AC) via an inverter, which can be used directly in the home or fed into the power grid.

Advantages of a PV system

  • Environmentally friendly: PV systems use an unlimited resource – sunlight – and produce no pollutants.
  • Cost-efficient: Once installed, PV systems can significantly reduce electricity costs and offer long-term savings.
  • Energy independence: With a PV system, households and businesses can reduce their dependence on fossil fuels and rising energy prices.
  • Value increase: Properties with solar panels often gain in market value.

Maintenance and lifespan

Photovoltaic systems are generally low-maintenance and long-lasting. Most modules have a lifespan of 25 to 30 years and retain a large portion of their performance even after decades. However, regular inspections and cleaning of the modules can help maintain efficiency.

Applications and extensions

Photovoltaic systems can be installed on both residential and commercial buildings. In combination with battery storage systems, they can ensure complete energy independence. Furthermore, innovative solutions such as facade-integrated modules or ground-mounted systems are possible to further optimize energy production.

Funding and financing

In Germany, there are numerous funding opportunities for photovoltaic systems, such as the Renewable Energy Sources Act (EEG). Regional programs and low-interest loans also facilitate financing. You can obtain information about these from your local energy agency or on the KfW Bank website.

Why invest in a PV system?

A photovoltaic system is a future-proof investment that not only contributes to sustainability but also offers financial advantages. With the right components and professional installation, the energy supply is secured for the long term.

Referenced terms and sources

This existing glossary article was reviewed and approved on 14 October 2026. Time-sensitive information still refers to its original publication context unless the article states otherwise. It does not replace installation instructions or confirm compatibility with a particular roof tile model.

Machine-assisted translation. The German version remains available.

Data sheet and installation guideOriginal source