Helmuth Frey

Field experience with molten carbonate fuel cells (MCFCs) and solid oxide fuel cells (SOFCs) with an emphasis on degradation

Alois Kessler, Wolfram Münch, Helmuth Frey, 2010 .

A control apparatus for a charging station to the current reference and / or for supplying power of a mobile storage and consumption unit

Alois Kessler, Jürgen Heiss, Lars Walch, 2008 .

Stationary Fuel Cells at Work – An Interim Report†

Wolfram Münch, Helmuth Frey, M. Edel, 2004 .