The KfW Development Bank is one of Germany's leading promotional banks and offers a wide range of programs to support projects in the areas of renewable energy, energy efficiency, and sustainable building. KfW funding is a particularly attractive option for financing or subsidizing investments in solar power systems and energy-efficient buildings. This article provides all the essential information about KfW funding, the application process, and how to contact them.

What is KfW?

KfW (Kreditanstalt für Wiederaufbau – German Development Bank) is a public-law promotional bank founded in 1948. It supports private individuals, companies, and public institutions in implementing projects that pursue economic, social, or environmental goals. Financing is provided through low-interest loans, grants, or equity investments.

KfW funding programs for solar and energy projects

KfW offers several programs for solar power systems and energy-efficient construction:

  • Program 270 – Renewable Energies: Promotion of photovoltaic systems, battery storage and other technologies for the use of renewable energies.
  • Program 261/262 – Energy-efficient construction and renovation: Support for new buildings and renovations with high energy efficiency standards.
  • Program 433 – Subsidy for battery storage: Funding for battery storage systems that are operated in combination with photovoltaic systems.
  • Programme 439 – Charging infrastructure: Promotion of charging stations for electric vehicles, especially in the commercial sector.

How do I apply for KfW funding?

Applications for KfW funding are usually submitted through a bank or credit institution. The following steps are necessary:

  1. Find out about available funding programs on the KfW website.
  2. Create a concept for your project, including a cost estimate.
  3. Speak to your bank, which will submit the application to KfW on your behalf.
  4. After review and approval by KfW, you will receive the funding or loan.

KfW contact options

For questions and further information, you can contact KfW directly:

  • Telephone service: 0800 539 9002 (free from German landlines)
  • Contact form: KfW contact form

KfW headquarters

KfW Banking Group, Palmengartenstraße 5-9, 60325 Frankfurt am Main, Germany, Telephone: +49 69 74310, Website: www.kfw.de

Important instructions

  • The application must be submitted before the start of the measure.
  • Funding conditions and interest rates may vary. Please check regularly for current terms and conditions.
  • In some cases, an energy consultant is required, especially for energy efficiency programs.

Conclusion

KfW offers a wide range of funding opportunities to facilitate the expansion of renewable energies and energy-efficient construction. Low-interest loans and attractive grants enable faster implementation of investments in sustainable projects. Take advantage of this opportunity to realize your solar or energy project with KfW support.

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.

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