idea to realisation

A strong team combines

experience with innovation

If you work alone, you add up. If you collaborate, you multiply. When people get together and exchange ideas, something new, something different arises. Making these novelties become reality requires courage and engagement. Our team unites people with the same target but different professional backgrounds. Long-standing experience in physical and technological research and development meets fresh, innovative thought-provoking impulses and concepts. With competence and passion we work together to realise our idea - for an innovative future and a successful energy transition.

Dipl.-Ing. (FH)

Stefan Höller


+ CEO and CTO

+ Hydrogen pioneer since 1991

+ Degree Dipl.-Ing. (FH) in physical engineering at the University of

   Applied Sciences of Lübeck

+ 1997 foundation of H-TEC Hydrogen-Energy-Systems GmbH,

   CEO and CTO

+ 2016 foundation of Hoeller Electrolyzer GmbH

+ More than 60 patents and patent applications in the field of

   electrolysis and fuel cells are based on his inventions

Lic.oec.HSG, MBA

Matthias Kramer


+ CEO and Chief Financial Officer

+ M.B.A., The University of Chicago Booth School of Business,

   USA, and lic.oec.HSG, University of St. Gallen, Switzerland

+ 20 years of experience in management consulting and leadership

   positions with Boston Consulting Group, Volkswagen
   Consulting and KPMG

+ Involved with Jacobs University Bremen and HSBA Hamburg

   School of Business Administration to take private higher

   education institutions further in Germany

DE  |  EN

Hoeller Electrolyzer GmbH

Alter Holzhafen 17 b

23966 Wismar  │ Germany


Phone: +49 3841 38901 0

Fax: +49 3841 38901 99



Imprint  |

privacy POLICY