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Our company philosophy is reflected in our name:

GERES – Company (Gesellschaft) for the Development (Entwicklung) and Utilization of Renewable Energy Systems

The GERES Group, with its headquarters in Frankfurt, Germany, was founded in 1995. The GERES Group is under the direction of the managing partners Norbert Wiemann and Carmen Wiemann.

In addition to local offices in Rheinlandpfalz and Thüringen we also have foreign offices in Italy, Austria, the United States and Mexico.

Working from an all-inclusive picture of the whole project, we are concerned with every aspect of its realization including site evaluation, the creation of feasibility studies, and the planning, permitting, construction and operation of power plants for the length of their lifespan.

Our focus is to maintain a standard of highest quality, therewith allowing for the calculation of operating costs on a long-term basis and providing a solid foundation for our projects.


GERES – Company for the Development and Utilization of Renewable Energy Systems

Solar Energy

The GERES-Group employs a holistic approach to all areas of its business and this includes photovoltaic. We evaluate potential sites, conduct feasibility studies and do the planning for a location. Furthermore, we plan and realize the permitting for the open-air solar site as well as » mehr

Wind Energy

We evaluate potential sites, conduct feasibility studies and do the planning for a location. Furthermore, we plan and realize the permitting for the wind park as well as the grid connection. On site supervision of our projects is mandatory. The quality of our work also shows in our selection of wind » mehr

  • Expansion of the wind park Büttstedt

    2013-08-07 - We are expanding our Wind Park Büttstedt with 5 wind turbines of the type Enercon E 82 and 2 wind turbines of the type Enercon E 70 yielding a combined output of 16.1 MW. » mehr

  • Construction Start for Wind Park Gimbweiler

    2013-06-20 - June 6, 2013 – The GERES GROUP has begun construction of the Wind Park Gimbweiler in region of Birkenfeld in Rheinland Pfalz. » mehr