Hans-Martin Rüter

SunTechnics Energy Systems, Inc. provides turnkey systems for the utilization of renewable energy. It offers end-to-end solutions from conceptualization to completion for renewable energy systems, including evaluation, feasibility study, design, engineering, supply, installation and commission, operation and maintenance of solar PV systems. The company was founded in 1996 by Hans-Martin Ruter and is headquartered in Sacramento, CA.

Conergy AG specializes in the manufacture of solar products. It also engages in the installation of photovoltaic systems and solar thermal plants. The company was founded by Hans-Martin Rüter, Elisabeth Ammer, Dieter Ammer, Nikolaus Krane, Angiolo Laviziano, Hans Bucher, Andreas Rittstieg, Renate Rüter, Andreas Rüter, Christina Rüter, Franziska Rüter, Annabelle Theurer, Dieter Krane, and Ennio Laviziano on December 22, 1998 and is headquartered in Berlin, Germany.

RütInvest GmbH is a German Hamburg-based company that was founded in 2007 by Hans-Martin Rüter, who has been the CEO since its inception. The private company provides investment services.

DZ-4 GmbH leases solar power systems and optionally electricity storage. The company was founded by Tobias Schütt and Florian Berghausen on January 1, 2012 and is headquartered in Hamburg, Germany.