About Büro F
Büro F is a Berliner market researcher specializing in renewable energy and storage technologies. Since 2014, we have been analyzing the latest developments in the energy industry and identifying attractive business models and current trends. Contact us and benefit from our experience in advising manufacturers, energy suppliers, investors and government institutions in the energy sector.
Büro F is involved in various committees and forums for the decentralized and democratic energy transition. We work internationally and are a cosmopolitan consulting company.
We work as a network of energy experts
Büro F brings together a network of independent renewable energy experts. The core of our network is the office community on Marienstraße 25 in Berlin Mitte:
Stephan Franz is the founder and owner of Büro F. He has been carrying out market analyses in the field of renewable energies and smart energy systems for more than ten years. He’s worked with Büro F as a freelance consultant in Berlin since 2014. Prior to founding Büro F, Stephan worked as a consultant to the GIZ in the Chilean Ministry of Energy. In the strategy department of the photovoltaic manufacturer Q CELLS he previously supported the development of new business models for the self-consumption of solar power. Other professional positions include working as a consultant at the German Energy Agency (dena) and as an analyst with the market researcher EuPD Research. Stephan studied Political Science and Economics at the University of Potsdam. In 2017 he also completed the MBA "Energy Management" at the TU Berlin. Stephan is fluent in German, English and Spanish.
Fabian Zuber, owner of the consultancy l'energie - Lokale Energie, is a cooperation and office partner of Büro F. He has been working in the field of renewable energies for more than ten years. Recently, in the capacity of director he has managed the design and establishment of the alliance Bürgerenergie and has advocated the strengthening of decentralized power provision there. As public affairs manager at the company First Solar, he was responsible for public relations and the codesigning of political framework conditions in Germany and other European markets. He has written studies on international energy markets for the German Society for International Cooperation (GIZ) and the German Energy Agency (dena). Fabian Zuber studied languages, economy and cultural studies at the University of Passau. He speaks fluent German, English, Spanish, French and Portuguese.
Ulrich Kaltenbach, owner of Kaltenbach Energy Consulting, is cooperation and office partner of Büro F. He has been working in the renewable energy sector for several years. Ulrich received his degree in economics and International Cultural and Business Studies at University Passau. Most recently, he worked as a consultant for Gesellschaft für Internationale Zusammenarbeit (GIZ) in El Salvador. He supported the introduction of renewable energies in Central America. Prior to that, he worked for five years with the top-four German utility EnBW. At EnBW, Ulrich was responsible for the development of photovoltaic projects in the megawatt range. As a consultant for the German Latin America Association (LAV), Ulrich started the working line renewable energies. He is fluent in German, English and Spanish. Ulrich lives and works in Berlin.
Mirco Sieg is a cooperation partner of Büro F and has been active in the renewable energy sector for more than seven years. As a freelance consultant and author in Düsseldorf, he is currently focusing on knowledge and technology transfer between Germany and South America. One of his focuses lies on the technical, economic and political challenges of using smart microgrids. Previously, he worked for several years as an editor for the photovoltaic journals "pv magazine" and "photovoltaik" of the pv magazine group GmbH and Solarpraxis AG in Berlin. As an employee at the Embassy of the Republic of Chile in Berlin, he supported scientific exchange between Germany and the Andean state, including in the area of renewable energies. Mirco holds a diploma in landscape ecology and is fluent in German, English and Spanish.